A conjugately configured supercapacitor based on pairs of pre-lithiated Nb2O5/TiO2 with optimized retained energy upon aging enabled by suppressed self-discharge
Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibilit...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Jing, Siqi [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Schlagwörter: |
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| Übergeordnetes Werk: |
Enthalten in: Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method - Xiao, Hong ELSEVIER, 2013, the international journal on the science and technology of electrochemical energy systems, New York, NY [u.a.] |
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| Übergeordnetes Werk: |
volume:549 ; year:2022 ; day:30 ; month:11 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.jpowsour.2022.232141 |
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| Katalog-ID: |
ELV059091630 |
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| 245 | 1 | 0 | |a A conjugately configured supercapacitor based on pairs of pre-lithiated Nb2O5/TiO2 with optimized retained energy upon aging enabled by suppressed self-discharge |
| 264 | 1 | |c 2022transfer abstract | |
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| 520 | |a Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. | ||
| 520 | |a Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. | ||
| 650 | 7 | |a Niobium oxide |2 Elsevier | |
| 650 | 7 | |a Titanium dioxide |2 Elsevier | |
| 650 | 7 | |a Pre-lithiation |2 Elsevier | |
| 650 | 7 | |a Self-discharge |2 Elsevier | |
| 650 | 7 | |a Conjugated supercapacitor |2 Elsevier | |
| 700 | 1 | |a Yan, Xiaohui |4 oth | |
| 700 | 1 | |a Li, Taibai |4 oth | |
| 700 | 1 | |a Xiong, Yige |4 oth | |
| 700 | 1 | |a Hu, Tao |4 oth | |
| 700 | 1 | |a Wang, Zhongjie |4 oth | |
| 700 | 1 | |a Ge, Xiang |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier |a Xiao, Hong ELSEVIER |t Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method |d 2013 |d the international journal on the science and technology of electrochemical energy systems |g New York, NY [u.a.] |w (DE-627)ELV00098745X |
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10.1016/j.jpowsour.2022.232141 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001929.pica (DE-627)ELV059091630 (ELSEVIER)S0378-7753(22)01118-1 DE-627 ger DE-627 rakwb eng 690 VZ 50.92 bkl Jing, Siqi verfasserin aut A conjugately configured supercapacitor based on pairs of pre-lithiated Nb2O5/TiO2 with optimized retained energy upon aging enabled by suppressed self-discharge 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. Niobium oxide Elsevier Titanium dioxide Elsevier Pre-lithiation Elsevier Self-discharge Elsevier Conjugated supercapacitor Elsevier Yan, Xiaohui oth Li, Taibai oth Xiong, Yige oth Hu, Tao oth Wang, Zhongjie oth Ge, Xiang oth Enthalten in Elsevier Xiao, Hong ELSEVIER Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method 2013 the international journal on the science and technology of electrochemical energy systems New York, NY [u.a.] (DE-627)ELV00098745X volume:549 year:2022 day:30 month:11 pages:0 https://doi.org/10.1016/j.jpowsour.2022.232141 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 549 2022 30 1130 0 |
| spelling |
10.1016/j.jpowsour.2022.232141 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001929.pica (DE-627)ELV059091630 (ELSEVIER)S0378-7753(22)01118-1 DE-627 ger DE-627 rakwb eng 690 VZ 50.92 bkl Jing, Siqi verfasserin aut A conjugately configured supercapacitor based on pairs of pre-lithiated Nb2O5/TiO2 with optimized retained energy upon aging enabled by suppressed self-discharge 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. Niobium oxide Elsevier Titanium dioxide Elsevier Pre-lithiation Elsevier Self-discharge Elsevier Conjugated supercapacitor Elsevier Yan, Xiaohui oth Li, Taibai oth Xiong, Yige oth Hu, Tao oth Wang, Zhongjie oth Ge, Xiang oth Enthalten in Elsevier Xiao, Hong ELSEVIER Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method 2013 the international journal on the science and technology of electrochemical energy systems New York, NY [u.a.] (DE-627)ELV00098745X volume:549 year:2022 day:30 month:11 pages:0 https://doi.org/10.1016/j.jpowsour.2022.232141 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 549 2022 30 1130 0 |
| allfields_unstemmed |
10.1016/j.jpowsour.2022.232141 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001929.pica (DE-627)ELV059091630 (ELSEVIER)S0378-7753(22)01118-1 DE-627 ger DE-627 rakwb eng 690 VZ 50.92 bkl Jing, Siqi verfasserin aut A conjugately configured supercapacitor based on pairs of pre-lithiated Nb2O5/TiO2 with optimized retained energy upon aging enabled by suppressed self-discharge 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. Niobium oxide Elsevier Titanium dioxide Elsevier Pre-lithiation Elsevier Self-discharge Elsevier Conjugated supercapacitor Elsevier Yan, Xiaohui oth Li, Taibai oth Xiong, Yige oth Hu, Tao oth Wang, Zhongjie oth Ge, Xiang oth Enthalten in Elsevier Xiao, Hong ELSEVIER Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method 2013 the international journal on the science and technology of electrochemical energy systems New York, NY [u.a.] (DE-627)ELV00098745X volume:549 year:2022 day:30 month:11 pages:0 https://doi.org/10.1016/j.jpowsour.2022.232141 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 549 2022 30 1130 0 |
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10.1016/j.jpowsour.2022.232141 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001929.pica (DE-627)ELV059091630 (ELSEVIER)S0378-7753(22)01118-1 DE-627 ger DE-627 rakwb eng 690 VZ 50.92 bkl Jing, Siqi verfasserin aut A conjugately configured supercapacitor based on pairs of pre-lithiated Nb2O5/TiO2 with optimized retained energy upon aging enabled by suppressed self-discharge 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. Niobium oxide Elsevier Titanium dioxide Elsevier Pre-lithiation Elsevier Self-discharge Elsevier Conjugated supercapacitor Elsevier Yan, Xiaohui oth Li, Taibai oth Xiong, Yige oth Hu, Tao oth Wang, Zhongjie oth Ge, Xiang oth Enthalten in Elsevier Xiao, Hong ELSEVIER Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method 2013 the international journal on the science and technology of electrochemical energy systems New York, NY [u.a.] (DE-627)ELV00098745X volume:549 year:2022 day:30 month:11 pages:0 https://doi.org/10.1016/j.jpowsour.2022.232141 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 549 2022 30 1130 0 |
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10.1016/j.jpowsour.2022.232141 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001929.pica (DE-627)ELV059091630 (ELSEVIER)S0378-7753(22)01118-1 DE-627 ger DE-627 rakwb eng 690 VZ 50.92 bkl Jing, Siqi verfasserin aut A conjugately configured supercapacitor based on pairs of pre-lithiated Nb2O5/TiO2 with optimized retained energy upon aging enabled by suppressed self-discharge 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. Niobium oxide Elsevier Titanium dioxide Elsevier Pre-lithiation Elsevier Self-discharge Elsevier Conjugated supercapacitor Elsevier Yan, Xiaohui oth Li, Taibai oth Xiong, Yige oth Hu, Tao oth Wang, Zhongjie oth Ge, Xiang oth Enthalten in Elsevier Xiao, Hong ELSEVIER Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method 2013 the international journal on the science and technology of electrochemical energy systems New York, NY [u.a.] (DE-627)ELV00098745X volume:549 year:2022 day:30 month:11 pages:0 https://doi.org/10.1016/j.jpowsour.2022.232141 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 50.92 Meerestechnik VZ AR 549 2022 30 1130 0 |
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Enthalten in Numerical modeling of wave–current forces acting on horizontal cylinder of marine structures by VOF method New York, NY [u.a.] volume:549 year:2022 day:30 month:11 pages:0 |
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Jing, Siqi ddc 690 bkl 50.92 Elsevier Niobium oxide Elsevier Titanium dioxide Elsevier Pre-lithiation Elsevier Self-discharge Elsevier Conjugated supercapacitor A conjugately configured supercapacitor based on pairs of pre-lithiated Nb2O5/TiO2 with optimized retained energy upon aging enabled by suppressed self-discharge |
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a conjugately configured supercapacitor based on pairs of pre-lithiated nb2o5/tio2 with optimized retained energy upon aging enabled by suppressed self-discharge |
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A conjugately configured supercapacitor based on pairs of pre-lithiated Nb2O5/TiO2 with optimized retained energy upon aging enabled by suppressed self-discharge |
| abstract |
Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. |
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Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. |
| abstract_unstemmed |
Supercapacitors are advantageous in terms of power density and cycle life, but their wider application is limited by self-discharge. Previous attempts for improving the stability have mainly focused on the specific component (materials, separators or electrolytes) of the device, while the feasibility for mitigating self-discharge through a general device-scale configuration is largely unknown. Herein, we report a symmetric supercapacitor with a conjugated configuration, which consists of a pair of pre-lithiated niobium oxide decorated with evenly distributed titanium dioxide, forming a Lix[(Nb2O5):(TiO2)a] vs. Li2-x[(Nb2O5):(TiO2)a] conjugated configuration. The intercalation type pseudocapacitive Nb2O5 are unique due to their linearly sloped charge/discharge curve like electrochemical double layer capacitances (EDLCs) while the charged ions can be inserted/extracted reversibly from the bulk like batteries. As a result, such conjugated device can store energy like conventional EDLCs, while the self-discharge process is significantly supressed. When further added with suitable amount of titanium dioxide as the stabilizer, the conjugated supercapacitor retained 74% of its energy after aging for 48 h. These results are expected to provide a general guidance for designing materials specifically for constructing conjugated supercapacitors with high initial energy density and alleviated self-discharge. |
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