碳酸乙烯酯
电解质
材料科学
化学工程
法拉第效率
碳酸二甲酯
丙烯酸酯
聚合物
阳极
多硫化物
离子电导率
锂(药物)
无机化学
化学
单体
电极
有机化学
复合材料
内分泌学
物理化学
工程类
医学
甲醇
作者
Qingjie Zhou,Chuankai Fu,Renlong Li,Xueyan Zhang,Bingxing Xie,Yunzhi Gao,Geping Yin,Pengjian Zuo
标识
DOI:10.1016/j.cej.2022.135419
摘要
Rechargeable lithium metal batteries (LMBs) have been regarded as one of the most promising next-generation energy-storage systems due to their high theoretical energy density. However, the practical application of LMBs is greatly impeded by poor high-voltage tolerance and safety concerns originated from flammable organic carbonate-based liquid electrolytes. Herein, a novel dual-salt gel polymer electrolyte (DS-GPE) is prepared via in situ polymerization of vinyl ethylene carbonate (VEC) and pentaerythritol tetra acrylate (PETEA) monomers in a poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) porous structure. The newly developed DS-GPE shows high ionic conductivity (6.9 mS cm−1) at room temperature, adequate Li+ transference number (tLi+= 0.512), outstanding oxidative resistance (5.3 V vs. Li/Li+) and favorable interfacial compatibility. Stable interfacial layers are rich in B-, F-, components on both the Li metal anode and high-voltage LiCoO2 cathode, realizing excellent cycling stability in Li||Li symmetrical cells, and a capacity retention of 83.42% over 100 cycles with average Coulombic efficiency of 99.86% in Li||LiCoO2 cell.
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