材料科学
电解质
阴极
阳极
电化学
环氧乙烷
准固态
纳米技术
氧化物
金属
化学工程
电导率
复合材料
电极
聚合物
物理化学
共聚物
色素敏化染料
冶金
化学
工程类
作者
Junze Guo,Weidong Zhang,Zeyu Shen,Shulan Mao,Xinyang Wang,Shichao Zhang,Jiahui Zhang,Yingying Lü
标识
DOI:10.1002/adfm.202204742
摘要
Abstract Poly(ethylene oxide) (PEO) based solid‐state electrolytes with good chemical stability against Li–metal, provide a promising solution for practical all solid‐state Li–metal batteries (ASSLMBs). However, the risk of short circuit using thin PEO under semi‐molten state and the oxidative decomposition of PEO by cathodes under high voltage hinder the practical application of PEO‐based ASSLMBs. Here, it is found that by readjusting the Li + and e – conductivity at anode/cathode interface by introducing Nanodiamonds (NDs) into PEO electrolytes can greatly improve the electrochemical performance of PEO‐based batteries. Under the mediation of high modulus and insulative NDs, the lifespan of Li symmetric cells can increase by 30 times at 0.8 mA cm –2 , and high‐voltage Li/LiCoO 2 cells show excellent capacity retention under practical testing conditions (50 µm Li and 30 µm PEO electrolyte).
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