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High power and stable P-doped yolk-shell structured Si@C anode simultaneously enhancing conductivity and Li+ diffusion kinetics
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Chen, Ming, Zhou, Qinnan, Zai, Jiantao, Iqbal, Asma, Tsega, Tsegaye Tadesse, Dong, Boxu, Liu, Xuejiao, Zhang, Yuchi, Yan, Changyu, Zhao, Liang, Nazakat, Ali, Peisan E., Sharel , Low, John C. T. and Qian, Xuefeng (2020) High power and stable P-doped yolk-shell structured Si@C anode simultaneously enhancing conductivity and Li+ diffusion kinetics. Nano Research . doi:10.1007/s12274-020-3142-9 (In Press)
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WRAP-High-power-stable-P-doped-yolk-shell-anode-kinetics-Low-2020.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (3888Kb) | Preview |
Official URL: http://dx.doi.org/10.1007/s12274-020-3142-9
Abstract
Silicon is a low price and high capacity anode material for lithium-ion batteries. The yolk-shell structure can effectively accommodate Si expansion to improve stability. However, the limited rate performance of Si anodes can’t meet people’s growing demand for high power density. Herein, the phosphorus-doped yolk-shell Si@C materials (P-doped Si@C) were prepared through carbon coating on P-doped Si/SiOx matrix to obtain high power and stable devices. Therefore, the as-prepared P-doped Si@C electrodes delivered a rapid increase in Coulombic efficiency from 74.4% to 99.6% after only 6 cycles, high capacity retention of ∼ 95% over 800 cycles at 4 A·g−1, and great rate capability (510 mAh·g−1 at 35 A·g−1). As a result, P-doped Si@C anodes paired with commercial activated carbon and LiFePO4 cathode to assemble lithium-ion capacitor (high power density of ∼ 61,080 W·kg−1 at 20 A·g−1) and lithium-ion full cell (good rate performance with 68.3 mAh·g−1 at 5 C), respectively. This work can provide an effective way to further improve power density and stability for energy storage devices.
| Item Type: | Journal Article | ||||||||||||||||||||||||
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| Subjects: | Q Science > QD Chemistry T Technology > TJ Mechanical engineering and machinery T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science > WMG (Formerly the Warwick Manufacturing Group) | ||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Lithium ion batteries, Silicon , Energy storage, Diffusion | ||||||||||||||||||||||||
| Journal or Publication Title: | Nano Research | ||||||||||||||||||||||||
| Publisher: | Tsinghua University Press | ||||||||||||||||||||||||
| ISSN: | 1998-0124 | ||||||||||||||||||||||||
| Official Date: | 2020 | ||||||||||||||||||||||||
| Dates: |
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| Date of first compliant deposit: | 28 October 2020 | ||||||||||||||||||||||||
| DOI: | 10.1007/s12274-020-3142-9 | ||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||
| Publication Status: | In Press | ||||||||||||||||||||||||
| Access rights to Published version: | Open Access | ||||||||||||||||||||||||
| Copyright Holders: | © The Author(s) 2020 | ||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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