材料科学
离子电导率
电解质
化学工程
电化学
膜
聚丙烯
碳酸乙烯酯
锂(药物)
电化学窗口
热稳定性
快离子导体
高分子化学
复合材料
化学
电极
医学
生物化学
物理化学
工程类
内分泌学
作者
Anh Le Mong,Yeonho Ahn,Rangaswamy Puttaswamy,Dong Jin Kim
出处
期刊:Energy materials
[OAE Publishing Inc.]
日期:2023-07-14
卷期号:3 (4)
被引量:2
标识
DOI:10.20517/energymater.2023.20
摘要
High lithium (Li)-ion conductive solid electrolytes with mechanical stability are quite important in the development of long-term safe and high-performance solid-state Li-sulfur batteries (LSBs). Accordingly, we prepared a pore-filling solid electrolyte (PFSE) by introducing poly(ethylene glycol) double-grafted (poly(arylene ether sulfone) (PAES-g-2PEG), ionic liquid (IL), and ethylene carbonate (EC) into a porous polypropylene/polyethylene/polypropylene (PP/PE/PP) substrate. While the PP/PE/PP substrate provides the membrane with the mechanical strength, the PAES-g-2PEG filler provides high Li-ion conductivity due to the facile ion conduction pathway formation via percolation in the presence of IL and EC. This synergistic effect allowed the prepared PFSE membranes to exhibit both high mechanical strength of 200 MPa, thermal stability above 150 °C, and high ion conductivity of 0.604 mS cm-1 with a Li-transfer number of 0.41. Moreover, PFSE membranes also achieved a large electrochemical potential window of 4.60 V and high cyclic stability after 500 h of Li-stripping/plating. The LSB cell based on a PFSE membrane showed excellent electrochemical performance with preserving 95% of initial capacity after 200 cycles at a 0.2 C-rate.
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