材料科学
锂(药物)
复合数
硅
电极
碳纤维
化学工程
聚合
电化学
储能
扩散
纳米技术
复合材料
光电子学
聚合物
物理
工程类
内分泌学
量子力学
物理化学
功率(物理)
化学
热力学
医学
作者
Runsheng Gao,Jie Tang,Kun Zhang,Kiyoshi Ozawa,Lu‐Chang Qin
出处
期刊:Nano Energy
[Elsevier]
日期:2020-12-01
卷期号:78: 105341-105341
被引量:65
标识
DOI:10.1016/j.nanoen.2020.105341
摘要
Silicon-based materials are showing appealing potentials for electrical energy storage because of their unparalleled theoretical energy density. In this work, a rapid and efficient surface-polymerization processing has been developed to obtain a sandwich-like silicon-carbon composite structure for fast lithium storage. The anchored silicon particles are connected with a low diffusion tortuosity in the designed structure that facilitates the electron transport throughout the electrode and enhances the response rate under high current density. Electrochemical measurements demonstrate that the silicon-carbon composite electrode exhibits a high capacity for lithium storage. It shows a reversible capacity of 1990 mA h g−1 at 0.5 C after 100 cycles and also has an excellent capacity retention property (only −0.062% capacity reduction per cycle) in long-term cycling at 1 C. Furthermore, it can deliver a high reversible specific capacity of 1170 mA h g−1 even at 4 C.
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