Mixed Salts of LiFSI and LiODFB for Stable LiCoO2-Based Batteries

Mixed Salts of LiFSI and LiODFB for Stable LiCoO2-Based Batteries
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用于稳定 LiCoO2 电池的 LiFSI 和 LiODFB 混合盐

DOI:
10.1149/2.1241613jes
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发表时间:
2016
影响因子:
3.9
通讯作者:
Bin Bai
Bin Bai
中科院分区:
工程技术4区
文献类型:
--
作者:
Shangguan Xuehui;Jia Guofeng;Li Faqiang;Wang Qinglei;Bin Bai

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为了改善钴酸锂(LiCoO 2)电池的长期循环稳定性,用双(氟磺酰)亚胺锂[N(SO 2F)2](LiFSI)和二氟硼酸锂(LiODFB)的混合盐取代六氟磷酸锂(LiPF 6)作为非水电解液的电解质。SEM和CV结果表明,LiODFB的加入可以抑制铝在LiFSI基电解液中的腐蚀。与使用LiPF 6基电解质的LiCoO 2基电池相比,使用LiFSI 0.7-LiODFB 0.3基电解质的LiCoO 2基电池的循环稳定性和倍率性能优异。
Mixed salts of lithium bis (fluorosulfonyl) imide Li [N (SO 2 F) 2](LiFSI) and Lithium difluoro (oxalato) borate (LiODFB) were used to improve excellent long-term cycling stability of Lithium cobaltate (LiCoO 2)-based batteries and substituted the Lithium hexafluorophosphate (LiPF 6) salt in non-aqueous electrolytes. SEM and CV demonstrated that adding LiODFB into LiFSI-based electrolytes could restrain aluminum corrosion caused by LiFSI-based electrolytes. Compared to LiCoO 2-based batteries using LiPF 6-based electrolytes, the cycling stability and rate capability of LiCoO 2-based batteries using LiFSI 0.7-LiODFB 0.3-based electrolytes were excellent.
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