Insitu coating of nitrogen-doped graphene-like nanosheets on silicon as a stable anode for high-performance lithium-ion batteries
| Autor: | Haitao Zhuo, Xiaoyan Chai, Jianhong Liu, Chuanxin He, Lingna Sun, Yongliang Li, Qianling Zhang, Peiyang Zhu, Hongwei Mi |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Silicon Renewable Energy Sustainability and the Environment Conformal coating Nanoparticle chemistry.chemical_element Nanotechnology General Chemistry engineering.material Anode chemistry Coating Chemical engineering engineering General Materials Science Lithium Faraday efficiency Nanosheet |
| Zdroj: | J. Mater. Chem. A. 2:11254-11260 |
| ISSN: | 2050-7496 2050-7488 |
| Popis: | Carbon coating is an effective approach to improve the cycling stability of silicon (Si) anodes for lithium-ion batteries. In this research, we report a facile one-step carbon-thermal method to coat Si nanoparticles with nitrogen-doped (N-doped) graphene-like nanosheets derived from a liquid-polyacrylonitrile (LPAN) precursor. The coated Si anode displays an initial coulombic efficiency of 82%, which is about three times greater than its pristine counterpart, as well as superior cycling stability. The performance improvement is a result of the N-doped graphene-like nanosheet conformal coating, which not only creates an electrically conductive network for the electrode, but also provides a buffering matrix to accommodate the volume change of Si during charging and discharging processes. |
| Databáze: | OpenAIRE |
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