1. Chitosan-derived graphitic carbon@Fe3C as anode materials for lithium ion battery.
- Author
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Li, Bowen, Zhang, Yu, Xiong, Jun, Gui, Yunyun, Huang, Tiantao, Peng, Junjun, Liu, Huihong, Yang, Feng, and Li, Ming
- Subjects
LITHIUM-ion batteries ,ENERGY storage ,SOLID electrolytes ,METAL compounds ,IRON compounds ,NANOPARTICLE size ,CARBON composites - Abstract
Chitosan-based carbon materials have attracted great attention in electrochemical energy storage. Introducing iron metal or iron compounds into carbon materials favors to boost their electrochemical performance. Herein, chitosan-based graphitic carbon@Fe
3 C composites (CSGC@Fe3 C) have been prepared as anode materials for lithium ion battery by a simple pyrolysis method. By manipulating the temperature higher than 700 °C, pure Fe3 C encapsulated in chitosan-based graphitic carbon with different mass ratio from 30 to 53.8 wt% can be achieved. The resulting CSGC@Fe3 C composites retain porous carbon sheet structure embedded with a large amount of Fe3 C nanoparticles in size from 20 to 300 nm. The electrochemical measurements demonstrate CSGC@Fe3 C with 53.8 wt% Fe3 C as anode material for lithium ion battery can provide a highest reversible capacity of 423 mAh g−1 at 0.1 A g−1 over 100 charge/discharge cycles and stable cycling capacity of 195 mAh g−1 at a high current density of 2 A g−1 during 200 cycles. The catalysis of Fe3 C on the reversible formation and decomposition of solid electrolyte interphase (SEI) has been corroborated and results in the improvement of surface capacitive contribution. This work provides a basic insight into metal carbides constructing biomass-based carbon anode materials to realize high-performance electrochemical energy storage device. [ABSTRACT FROM AUTHOR]- Published
- 2022
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