Influence of transition metal doping on nano silicon anodes for Li-ion energy storage applications
Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for...
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| Autor*in: |
Nulu, Arunakumari [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022transfer abstract |
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| Übergeordnetes Werk: |
Enthalten in: Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners - Jacobs, Jacquelyn A. ELSEVIER, 2017, JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics, Lausanne |
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| Übergeordnetes Werk: |
volume:911 ; year:2022 ; day:5 ; month:08 ; pages:0 |
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| DOI / URN: |
10.1016/j.jallcom.2022.164976 |
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ELV057636060 |
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| 520 | |a Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. | ||
| 520 | |a Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. | ||
| 650 | 7 | |a Li-ion energy storage |2 Elsevier | |
| 650 | 7 | |a Metal doped silicon |2 Elsevier | |
| 650 | 7 | |a Silicon anodes |2 Elsevier | |
| 650 | 7 | |a Transition metal doping |2 Elsevier | |
| 700 | 1 | |a Nulu, Venugopal |4 oth | |
| 700 | 1 | |a Sohn, Keun Yong |4 oth | |
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10.1016/j.jallcom.2022.164976 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001766.pica (DE-627)ELV057636060 (ELSEVIER)S0925-8388(22)01367-6 DE-627 ger DE-627 rakwb eng 630 VZ Nulu, Arunakumari verfasserin aut Influence of transition metal doping on nano silicon anodes for Li-ion energy storage applications 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. Li-ion energy storage Elsevier Metal doped silicon Elsevier Silicon anodes Elsevier Transition metal doping Elsevier Nulu, Venugopal oth Sohn, Keun Yong oth Enthalten in Elsevier Jacobs, Jacquelyn A. ELSEVIER Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners 2017 JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics Lausanne (DE-627)ELV001115774 volume:911 year:2022 day:5 month:08 pages:0 https://doi.org/10.1016/j.jallcom.2022.164976 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 911 2022 5 0805 0 |
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10.1016/j.jallcom.2022.164976 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001766.pica (DE-627)ELV057636060 (ELSEVIER)S0925-8388(22)01367-6 DE-627 ger DE-627 rakwb eng 630 VZ Nulu, Arunakumari verfasserin aut Influence of transition metal doping on nano silicon anodes for Li-ion energy storage applications 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. Li-ion energy storage Elsevier Metal doped silicon Elsevier Silicon anodes Elsevier Transition metal doping Elsevier Nulu, Venugopal oth Sohn, Keun Yong oth Enthalten in Elsevier Jacobs, Jacquelyn A. ELSEVIER Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners 2017 JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics Lausanne (DE-627)ELV001115774 volume:911 year:2022 day:5 month:08 pages:0 https://doi.org/10.1016/j.jallcom.2022.164976 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 911 2022 5 0805 0 |
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10.1016/j.jallcom.2022.164976 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001766.pica (DE-627)ELV057636060 (ELSEVIER)S0925-8388(22)01367-6 DE-627 ger DE-627 rakwb eng 630 VZ Nulu, Arunakumari verfasserin aut Influence of transition metal doping on nano silicon anodes for Li-ion energy storage applications 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. Li-ion energy storage Elsevier Metal doped silicon Elsevier Silicon anodes Elsevier Transition metal doping Elsevier Nulu, Venugopal oth Sohn, Keun Yong oth Enthalten in Elsevier Jacobs, Jacquelyn A. ELSEVIER Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners 2017 JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics Lausanne (DE-627)ELV001115774 volume:911 year:2022 day:5 month:08 pages:0 https://doi.org/10.1016/j.jallcom.2022.164976 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 911 2022 5 0805 0 |
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10.1016/j.jallcom.2022.164976 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001766.pica (DE-627)ELV057636060 (ELSEVIER)S0925-8388(22)01367-6 DE-627 ger DE-627 rakwb eng 630 VZ Nulu, Arunakumari verfasserin aut Influence of transition metal doping on nano silicon anodes for Li-ion energy storage applications 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. Li-ion energy storage Elsevier Metal doped silicon Elsevier Silicon anodes Elsevier Transition metal doping Elsevier Nulu, Venugopal oth Sohn, Keun Yong oth Enthalten in Elsevier Jacobs, Jacquelyn A. ELSEVIER Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners 2017 JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics Lausanne (DE-627)ELV001115774 volume:911 year:2022 day:5 month:08 pages:0 https://doi.org/10.1016/j.jallcom.2022.164976 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 911 2022 5 0805 0 |
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10.1016/j.jallcom.2022.164976 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000001766.pica (DE-627)ELV057636060 (ELSEVIER)S0925-8388(22)01367-6 DE-627 ger DE-627 rakwb eng 630 VZ Nulu, Arunakumari verfasserin aut Influence of transition metal doping on nano silicon anodes for Li-ion energy storage applications 2022transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. Li-ion energy storage Elsevier Metal doped silicon Elsevier Silicon anodes Elsevier Transition metal doping Elsevier Nulu, Venugopal oth Sohn, Keun Yong oth Enthalten in Elsevier Jacobs, Jacquelyn A. ELSEVIER Factors associated with canine resource guarding behaviour in the presence of people: A cross-sectional survey of dog owners 2017 JAL : an interdisciplinary journal of materials science and solid-state chemistry and physics Lausanne (DE-627)ELV001115774 volume:911 year:2022 day:5 month:08 pages:0 https://doi.org/10.1016/j.jallcom.2022.164976 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 911 2022 5 0805 0 |
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Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. |
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Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. |
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Silicon is a promising alternative anode material for lithium-ion batteries (LIBs), offering a high theoretical capacity and low working potential versus Li+/Li. However, massive volume changes during the Li+ charge/discharge process and the low intrinsic conductivity of Si are limiting factors for its practical applicability in energy storage systems. In this study, transition metal (Mn, Ni)-doped silicon nanoparticles (Si NPs) with different dopant concentrations were prepared using a low-temperature heat treatment approach and studied as anode materials for LIBs. Compared to pure Si anodes, transition metal-doped Si anodes showed improved electrochemical performance. After 100 cycles, 0.5% Mn- and 0.5% Ni-doped Si anodes delivered 2324 mA h g–1 and 2561mA h g–1 with 88% and 86% capacity retention, respectively, at 200 mA g–1 (vs. first reversible capacity). The prepared anodes exhibited a superior rate capability and better Li+ diffusion properties. These significant enhancements in the electrochemical properties are attributed to the metal dopant, which enhances the intrinsic conductivity of the host Si and mitigates volume expansion. Moreover, it provides the required ionic channels for faster Li+ diffusion while reducing the Li+ diffusion length across the host Si. The full cells fabricated from the prelithiated metal-doped Si anodes and commercial LiCoO2 cathodes delivered high energy densities of 371 Wh kg–1 and 388.5 Wh kg–1, respectively, and were found to be suitable for Li+ energy storage applications. |
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