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

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 tr...

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Published inNanoscale research letters Vol. 15; no. 1; pp. 193 - 8
Main Authors Li, Zhigang, Guan, Zhongxiang, Guan, Zhiping, Liang, Ce, Yu, Kaifeng
Format Journal Article
LanguageEnglish
Published New York Springer US 01.10.2020
Springer Nature B.V
SpringerOpen
Subjects
Activated carbon
Agricultural pollution
Anodes
Batteries
Biomass
Carbon
Chemistry and Materials Science
Composite materials
Cryogenic engineering
Cryogenic process
Cryogenic treatment
Electrochemical analysis
Electrochemistry
Electrode materials
Hemp
Hemp stems
High specific capacity
Lithium
Lithium-ion batteries
Materials Science
Mechanical properties
Methods
Molecular Medicine
Nano Express
Nanochemistry
Nanoscale Science and Technology
Nanotechnology
Nanotechnology and Microengineering
Pore size
Pore structure
Porosity
Rechargeable batteries
Lithium-ion batteries
Cryogenic process
Pore structure
Hemp stems
High specific capacity
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Summary: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 m 2 /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.
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ISSN:1556-276X
1931-7573
1556-276X
DOI:10.1186/s11671-020-03422-w