电解质
锂(药物)
膜
复合数
聚偏氟乙烯
材料科学
离子电导率
化学工程
聚合物
原位聚合
法拉第效率
相(物质)
聚合
化学
复合材料
电极
有机化学
工程类
医学
物理化学
生物化学
内分泌学
作者
Fujun Zhang,Dan Mao,Wenbo Xin,Shaofei Yang,Hao Zhang,Yanzhu Zhang,Xundao Liu,Dehua Dong,Zhengmao Ye,Jiajie Li
出处
期刊:Polymers
[MDPI AG]
日期:2024-02-20
卷期号:16 (5): 565-565
标识
DOI:10.3390/polym16050565
摘要
Numerous endeavors have been dedicated to the development of composite polymer electrolyte (CPE) membranes for all-solid-state batteries (SSBs). However, insufficient ionic conductivity and mechanical properties still pose great challenges in practical applications. In this study, a flexible composite electrolyte membrane (FCPE) with fast ion transport channels was prepared using a phase conversion process combined with in situ polymerization. The polyvinylidene fluoride-hexafluoro propylene (PVDF-HFP) polymer matrix incorporated with lithium lanthanum zirconate (LLZTO) formed a 3D net-like structure, and the in situ polymerized polyvinyl ethylene carbonate (PVEC) enhanced the interface connection. This 3D network, with multiple rapid pathways for Li+ that effectively control Li+ flux, led to uniform lithium deposition. Moreover, the symmetrical lithium cells that used FCPE exhibited high stability after 1200 h of cycling at 0.1 mA cm−2. Specifically, all-solid-state lithium batteries coupled with LiFePO4 cathodes can stably cycle for over 100 cycles at room temperature with high Coulombic efficiencies. Furthermore, after 100 cycles, the infrared spectrum shows that the structure of FCPE remains stable. This work demonstrates a novel insight for designing a flexible composite electrolyte for highly safe SSBs.
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