Vanadium-Doped Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S Heterojunction Nanofibers as High-Capacity and Long-Cycle-Life Anodes
Lithium-ion batteries (LIBs) are considered one of the most important solutions for energy storage; however, conventional graphite anodes possess limited specific capacity and rate capability. Bismuth sulfide (Bi<sub>2</sub>S<sub>3</sub>) and cobalt sulfide (Co<sub>1−x&...
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2024-12-01
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| Online Access: | https://www.mdpi.com/1996-1073/17/23/6196 |
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| author | Haomiao Yang Lehao Liu Zhuoheng Wu Jinkui Zhang Chenhui Song Yingfeng Li |
| author_facet | Haomiao Yang Lehao Liu Zhuoheng Wu Jinkui Zhang Chenhui Song Yingfeng Li |
| author_sort | Haomiao Yang |
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| description | Lithium-ion batteries (LIBs) are considered one of the most important solutions for energy storage; however, conventional graphite anodes possess limited specific capacity and rate capability. Bismuth sulfide (Bi<sub>2</sub>S<sub>3</sub>) and cobalt sulfide (Co<sub>1−x</sub>S) with higher theoretical capacities have emerged as promising alternatives, but they face challenges such as significant volume expansion during electrochemical cycling and poor electrical conductivity. To tackle these problems, vanadium was doped into Bi<sub>2</sub>S<sub>3</sub> to improve its electronic conductivity; subsequently, a vanadium-doped Bi<sub>2</sub>S<sub>3</sub> (V-Bi<sub>2</sub>S<sub>3</sub>)@Co<sub>1−x</sub>S heterojunction structure was synthesized via a facile hydrothermal method to mitigate volume expansion by the closely bonded heterojunction interface. Moreover, the built-in electric field (BEF) created at the heterointerfaces can significantly enhance charge transport and facilitate reaction kinetics. Additionally, the nanofiber morphology of the V-Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S heterojunction structure further contributed to improved electrochemical performance. As a result, the V-Bi<sub>2</sub>S<sub>3</sub> electrode exhibited better electrochemical performance than the pure Bi<sub>2</sub>S<sub>3</sub> electrode, and the V-Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S electrode showed a significantly enhanced performance compared to the V-Bi<sub>2</sub>S<sub>3</sub> electrode. The V-Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S heterojunction electrode displayed a high capacity of 412.5 mAh g<sup>−1</sup> after 2000 cycles at 1.0 A g<sup>−1</sup> with high coulombic efficiencies of ~100%, indicating a remarkable long-term cycling stability. |
| format | Article |
| id | doaj-art-fc8cc8f8aa6c4b09807be02471046cbc |
| institution | Kabale University |
| issn | 1996-1073 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Energies |
| spelling | doaj-art-fc8cc8f8aa6c4b09807be02471046cbc2024-12-13T16:26:20ZengMDPI AGEnergies1996-10732024-12-011723619610.3390/en17236196Vanadium-Doped Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S Heterojunction Nanofibers as High-Capacity and Long-Cycle-Life AnodesHaomiao Yang0Lehao Liu1Zhuoheng Wu2Jinkui Zhang3Chenhui Song4Yingfeng Li5School of New Energy, North China Electric Power University, Beijing 102206, ChinaSchool of New Energy, North China Electric Power University, Beijing 102206, ChinaSchool of New Energy, North China Electric Power University, Beijing 102206, ChinaSchool of New Energy, North China Electric Power University, Beijing 102206, ChinaSchool of New Energy, North China Electric Power University, Beijing 102206, ChinaSchool of New Energy, North China Electric Power University, Beijing 102206, ChinaLithium-ion batteries (LIBs) are considered one of the most important solutions for energy storage; however, conventional graphite anodes possess limited specific capacity and rate capability. Bismuth sulfide (Bi<sub>2</sub>S<sub>3</sub>) and cobalt sulfide (Co<sub>1−x</sub>S) with higher theoretical capacities have emerged as promising alternatives, but they face challenges such as significant volume expansion during electrochemical cycling and poor electrical conductivity. To tackle these problems, vanadium was doped into Bi<sub>2</sub>S<sub>3</sub> to improve its electronic conductivity; subsequently, a vanadium-doped Bi<sub>2</sub>S<sub>3</sub> (V-Bi<sub>2</sub>S<sub>3</sub>)@Co<sub>1−x</sub>S heterojunction structure was synthesized via a facile hydrothermal method to mitigate volume expansion by the closely bonded heterojunction interface. Moreover, the built-in electric field (BEF) created at the heterointerfaces can significantly enhance charge transport and facilitate reaction kinetics. Additionally, the nanofiber morphology of the V-Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S heterojunction structure further contributed to improved electrochemical performance. As a result, the V-Bi<sub>2</sub>S<sub>3</sub> electrode exhibited better electrochemical performance than the pure Bi<sub>2</sub>S<sub>3</sub> electrode, and the V-Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S electrode showed a significantly enhanced performance compared to the V-Bi<sub>2</sub>S<sub>3</sub> electrode. The V-Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S heterojunction electrode displayed a high capacity of 412.5 mAh g<sup>−1</sup> after 2000 cycles at 1.0 A g<sup>−1</sup> with high coulombic efficiencies of ~100%, indicating a remarkable long-term cycling stability.https://www.mdpi.com/1996-1073/17/23/6196vanadium dopingheterojunctionV-Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S nanofiberlithium-ion batteries |
| spellingShingle | Haomiao Yang Lehao Liu Zhuoheng Wu Jinkui Zhang Chenhui Song Yingfeng Li Vanadium-Doped Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S Heterojunction Nanofibers as High-Capacity and Long-Cycle-Life Anodes Energies vanadium doping heterojunction V-Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S nanofiber lithium-ion batteries |
| title | Vanadium-Doped Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S Heterojunction Nanofibers as High-Capacity and Long-Cycle-Life Anodes |
| title_full | Vanadium-Doped Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S Heterojunction Nanofibers as High-Capacity and Long-Cycle-Life Anodes |
| title_fullStr | Vanadium-Doped Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S Heterojunction Nanofibers as High-Capacity and Long-Cycle-Life Anodes |
| title_full_unstemmed | Vanadium-Doped Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S Heterojunction Nanofibers as High-Capacity and Long-Cycle-Life Anodes |
| title_short | Vanadium-Doped Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S Heterojunction Nanofibers as High-Capacity and Long-Cycle-Life Anodes |
| title_sort | vanadium doped bi sub 2 sub s sub 3 sub co sub 1 x sub s heterojunction nanofibers as high capacity and long cycle life anodes |
| topic | vanadium doping heterojunction V-Bi<sub>2</sub>S<sub>3</sub>@Co<sub>1−x</sub>S nanofiber lithium-ion batteries |
| url | https://www.mdpi.com/1996-1073/17/23/6196 |
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