Effect of Deep Cryogenic Activated Treatment on Hemp Stem-Derived Carbon Used as Anode for Lithium-Ion Batteries

Nanoscale Research Letters

Ce Liang¹  Kaifeng Yu¹  Zhiping Guan²  Zhongxiang Guan²  Zhigang Li² 

[1] Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, 130025, Changchun, China;Key Laboratory of Automobile Materials, Ministry of Education, College of Materials Science and Engineering, Jilin University, 130025, Changchun, China;Institute of Superplastic and Plastic of Jilin University, 130025, Changchun, China;

关键词: Cryogenic process;    Hemp stems;    Pore structure;    Lithium-ion batteries;    High specific capacity;   

DOI  :  10.1186/s11671-020-03422-w

来源: Springer

【 摘 要 】

The cryogenic process has been widely applied in various fields, but it has rarely been reported in the preparation of anode materials for lithium-ion battery. In this paper, activated carbon derived from hemp stems was prepared by carbonization and activation; then, it was subjected to cryogenic treatment to obtain cryogenic activated carbon. The characterization results show that the cryogenic activated carbon (CAC) has a richer pore structure than the activated carbon (AC) without cryogenic treatment, and its specific surface area is 1727.96 m2/g. The porous carbon had an excellent reversible capacity of 756.8 mAh/g after 100 cycles at 0.2 C as anode of lithium-ion battery, in which the electrochemical performance of CAC was remarkably improved due to its good pore structure. This provides a new idea for the preparation of anode materials for high-capacity lithium-ion batteries.

【 授权许可】

CC BY