聚丙烯腈
材料科学
阴极
电化学
化学工程
肿胀 的
阳极
复合材料
电导率
锂(药物)
电阻率和电导率
电极
聚合物
化学
内分泌学
物理化学
工程类
电气工程
医学
作者
Shiying Chen,Jian Zou,Ke Gui,Ge Zhou,Hong Li,Liping Wang
摘要
FeSx (1 ≤ x ≤ 1.14) is one of the most promising conversion-type cathodes as lithium metal batteries due to its low-cost and high energy density. Nevertheless, it suffers from heavy volume change, which brings in fast capacity decay. In this study, we employ four different binders (PVDF, PAN, SBR/CMC, and PAA/CMC) to improve their electrochemical performance. It is found that PAN demonstrates the best performance from 559.5 mAh/g (first) to 458.5 mAh/g (100th) at 0.2 C in the voltage window of 1.0 − 3.0 V. This can be ascribed to its high adhesion strength, good electrical conductivity, low swelling properties, high polarity, and good mechanical stability. The findings highlight the importance of a binder material to guide good cycling stabilities for conversion-type or high-volume change cathodes.
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