阳极
材料科学
石墨烯
锂(药物)
电化学
碳纳米管
碳纤维
电流密度
体积膨胀
化学工程
锂离子电池
纳米技术
复合材料
复合数
电池(电)
电极
化学
物理化学
功率(物理)
医学
内分泌学
量子力学
工程类
内科学
物理
作者
Cong He,Xiaochun Li,Jie Zheng,Bohejin Tang,Yichuan Rui
标识
DOI:10.1016/j.colsurfa.2021.128226
摘要
Pyrite FeS2, which has abundant reserves, is widely regarded as an excellent anode material for lithium-ion batteries. However, FeS2 is prone to volume expansion and low conductivity during charging and discharging, resulting in poor electrochemical performance. In this paper, a fast non-hydrogel method was used to synthesize the precursor of FeS2 @C (carbon nanotubes, graphene, crab shell carbon, and sucrose carbon), and the obtained FeS2@CNT has a relatively best electrochemical performance. Benefiting from its structural advantages, FeS2@CNT exhibits a good rate performance (1200, 1125, 1020, 920 and 820 mA h g−1 at five levels of the current density of 100–2000 mA g−1). And it has an excellent cycle performance (1200 mA h g−1 after 100 cycles at 100 mA g−1). It shows that this method has considerable advantages in the process of preparing composites.
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