电解质
离子电导率
材料科学
化学工程
电导率
锂(药物)
盐(化学)
六氟丙烯
聚合物
溶剂
膜
高分子化学
化学
复合材料
有机化学
共聚物
电极
医学
生物化学
物理化学
四氟乙烯
工程类
内分泌学
作者
Mingming Ma,Menghui Zhang,Lei Shi,Jingang Zheng,Zhengxin Wang,Bingcheng Hu,Chengguo Sun
标识
DOI:10.1016/j.ssi.2023.116242
摘要
Solid-state polymer electrolytes (SSPEs) in combination with an ultrahigh content of lithium salt would result in the poor membrane-forming property and mechanical strength of electrolyte member. To address these issues, herein, we construct glass fibre (GF) supported poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) electrolyte membrane (GF-PVHF) with the mass ratio of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) to PVDF-HFP ranging from 1.0 to 3.4. When the GF-PVHF electrolyte membrane with 2.8 mass ratio shows the high room temperature ionic conductivity of 8.92 × 10−4 Scm−1, and presents the good flexibility and non-flammability due to the synergistic action between GF and PVDF-HFP. Both the assembled LiFePO4/Li and LiNi0.6Co0.2Mn0.2O2/Li batteries exhibit excellent cycling stability, with capacity retention of 93.9% for LiFePO4/Li after 300 cycles at room temperature and 88.9% for LiNi0.6Co0.2Mn0.2O2/Li after 100 cycles at room temperature. This work provides a strategy of designing SSPEs with ultrahigh salt concentration over 70%.
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