1. Boron-Doped, Carbon-Coated SnO2/Graphene Nanosheets for Enhanced Lithium Storage.
- Author
-
Liu, Yuxin, Liu, Ping, Wu, Dongqing, Huang, Yanshan, Tang, Yanping, Su, Yuezeng, Zhang, Fan, and Feng, Xinliang
- Subjects
DOPING agents (Chemistry) ,ELECTROCHEMICAL analysis ,ELECTRIC properties of graphene ,STANNIC oxide ,LITHIUM-ion batteries ,NANOFABRICATION ,HYDROTHERMAL carbonization - Abstract
Heteroatom doping is an effective method to adjust the electrochemical behavior of carbonaceous materials. In this work, boron-doped, carbon-coated SnO
2 /graphene hybrids (BCTGs) were fabricated by hydrothermal carbonization of sucrose in the presence of SnO2 /graphene nanosheets and phenylboronic acid or boric acid as dopant source and subsequent thermal treatment. Owing to their unique 2D core-shell architecture and B-doped carbon shells, BCTGs have enhanced conductivity and extra active sites for lithium storage. With phenylboronic acid as B source, the resulting hybrid shows outstanding electrochemical performance as the anode in lithium-ion batteries with a highly stable capacity of 1165 mA h g−1 at 0.1 A g−1 after 360 cycles and an excellent rate capability of 600 mA h g−1 at 3.2 A g−1 , and thus outperforms most of the previously reported SnO2 -based anode materials. [ABSTRACT FROM AUTHOR]- Published
- 2015
- Full Text
- View/download PDF