Electrochemical properties of stoichiometric CuS coated on carbon fiber paper and Cu foil current collectors as cathode material for lithium batteries
Electrochemical properties of stoichiometric CuS coated on carbon fiber paper and Cu foil current collectors as cathode material for lithium batteries
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DOI：
10.1039/c7ta00614d
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发表时间：
2017-04-21
影响因子：
11.9
通讯作者：
Taniguchi, Izumi
中科院分区：
文献类型：
--
作者：
Kalimuldina, Gulnur;Taniguchi, Izumi
我们通过在400 ° C下喷雾热解，然后在150 ° C下低温热处理1小时来制备化学计量的CuS，以进行电化学反应机理研究。在0.02C和1.2- 3.0V下用Li/Li+循环后，通过非原位XRD分析涂覆在碳纤维纸（CFP）和Cu箔集流体上的阴极电极。由于在第一次充电后形成低结晶度的CuS，以及多硫化锂（Li 2Sx，2 < x）的溶解，化学计量的涂覆在CFP集流体上的CuS遭受第一次循环的不可逆性和第五次循环至120 mA h g（-1）后的快速容量衰减
We prepared stoichiometric CuS by spray pyrolysis at 400 degrees C, followed by low temperature heat treatment at 150 degrees C for 1 h to conduct electrochemical reaction mechanism studies. The cathode electrode coated on carbon fiber paper (CFP) and Cu foil current collectors were analyzed by ex situ XRD after cycling at 0.02C and 1.2-3.0 V with Li/Li+. Stoichiometric CuS coated on a CFP current collector suffered from the 1st cycle irreversibility and rapid capacity fading after the 5th cycle to 120 mA h g(-1), owing to the formation of a low crystallinity CuS after the 1st charge, and the dissolution of lithium polysulfides (Li2Sx, 2 < x