Pretreatment of Graphite Anodes with Lithium Sulfate to Improve the Cycle Performance of Lithium-Ion Batteries
Pretreatment of Graphite Anodes with Lithium Sulfate to Improve the Cycle Performance of Lithium-Ion Batteries
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硫酸锂预处理石墨负极提高锂离子电池循环性能
DOI：
10.1002/ente.201600360
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发表时间：
2017
影响因子：
3.8
通讯作者：
Ye Xiushen
中科院分区：
文献类型：
--
作者：
Cui Xiaoling;Tang Fengjuan;Li Chunlei;Zhang Yu;Wang Peng;Li Shiyou;Ye Xiushen
用0.5 mol L - 1li2so4水溶液对石墨电极表面进行喷雾沉积预处理。采用傅里叶变换红外光谱、X射线光电子能谱和电化学测量方法研究了在Li2SO4处理过的石墨电极表面形成的固体电解质界面（SEI）膜的物理和电化学性能。结果表明，在Li2SO4的促进下形成的SEI膜薄、稳定、有效且具有弹性，可以适应电化学循环过程中石墨电极的体积变化。由于基于Li2SO4处理石墨电极的Li/中间相碳微珠（MCMB）电池表现出优异的循环性能和低界面阻抗，我们可以推断，这种改性对锂离子电池（lib）有积极的影响，提供了更快充电的可能性，并且适合于速率要求高的应用，如电动汽车和混合动力汽车。
Graphite electrode surfaces are pretreated by spray‐deposition method with 0.5 mol L−1Li2SO4aqueous solution. The physical and electrochemical properties of a solid electrolyte interphase (SEI) film formed on the surface of Li2SO4‐treated graphite electrode are investigated by Fourier transform infrared spectroscopy, X‐ray photoelectron spectroscopy, and electrochemical measurements. The results show that the SEI film formed, promoted by Li2SO4, is thin, stable, effective, and elastic to accommodate volume changes of graphite electrode during electrochemical cycles. Due to the fact that the Li/mesophase carbon microbeads (MCMB) cell based on Li2SO4‐treated graphite electrode exhibits excellent cycling performance and low interfacial impedance, we can deduce that such modifies have positive implications for lithium‐ion batteries (LIBs), offering the possibility of faster‐charging LIBs and LIBs that are suitable for rate‐demanding applications, such electric vehicles and hybrid electric vehicles.