期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 9, 页码 7946-7954出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b16724
关键词
cellulose; silicon anode; Li-ion batteries; carbon; electrochemical performance
资金
- Xiamen University [20720150090]
- Xiamen Southern Oceanographic Center [4GZP59HJ29]
- Fujian Provincial Department of Ocean and Fisheries [2015-27]
In this work, we propose a novel and facile route for the rational design of Si@SiO2/C anode materials by using sustainable and environment-friendly cellulose as a carbon resource. To simultaneously obtain a SiO2 layer and a carbon scaffold, a specially designed homogeneous cellulose solution and commercial Si nanopowder are used as the starting materials, and the cellulose/Si composite is directly assembled by an in situ regenerating method. Subsequently, Si@SiO2/C composite is obtained after carbonization. As expected, Si@SiO2 is homogeneously encapsulated in the cellulose-derived carbon network. The obtained Si@SiO2/C composite shows a high reversible capacity of 1071 mA h g(-1) at a current density of 420 mA g(-1) and 70% capacity retention after 200 cycles. This novel, sustainable, and effective design is a promising approach to obtain high-performance and cost-effective composite anodes for practical applications.
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