Excellent Cyclic and Rate Performances of SiO/C/Graphite Composites as Li-Ion Battery Anode.
作者:Hu, Long; Xia, Wenming; Tang, Renheng; Hu, Renzong; Ouyang, Liuzhang; Sun, Tai; Wang, Hui
Frontiers in chemistry
卷:8 页:388
DOI:10.3389/fchem.2020.00388
出版年: 2020
文献类型:Journal Article
摘要
The SiO-based composites containing different carbon structures were prepared from asphalt and graphite by the milling, spray drying, and pyrolysis. In the obtained near-spherical composite particles, the refined amorphous SiO plates, which are coated with an amorphous carbon layer, are aggregated with the binding of graphite sheets. The SiO/C/Graphite composites present a maximum initial charge capacity of 963 mAh g-1 at 100 mA g-1, excellent cyclic stability (~950 mAh g-1 over 100 cycles), and rate capability with the charge capacity of 670 mAh g-1 at 1,000 mA g-1. This significant improvement of electrochemical performances in comparison with pristine SiO or SiO/C composite is attributed to the unique microstructure, in which both the graphite sheets and amorphous carbon coating could enhance the conductivity of SiO and buffer the volume change of SiO. The higher pyrolysis temperature causes the denser spherical microstructure and better cycle life. Our work demonstrates the potential of this SiO/C/Graphite composite for high capacity anode of LIBs.
Copyright © 2020 Hu, Xia, Tang, Hu, Ouyang, Sun and Wang.
关键词
关键词列表:SiO; cyclic stability; lithium-ion battery; pyrolysis; spray drying
作者信息
地址:Guangdong Provincial Key Laboratory of Advanced Energy Storage Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, China.
Guangdong Province Key Laboratory of Rare Earth Development and Application, Guangdong Research Institute of Rare Metals, Guangzhou, China.
期刊信息
Impact Factor (影响因子): Journal Citation Reports