材料科学
电解质
电化学
离子电导率
互穿聚合物网络
化学工程
电化学窗口
金属
聚合物
快离子导体
热稳定性
电极
复合材料
化学
冶金
物理化学
工程类
作者
Jun Ying,Nan Gao,Feilong Dong,Haiming Xie,Jun Li
标识
DOI:10.1016/j.est.2023.108809
摘要
Semi-interpenetrating-network (semi-IPN) PEO-based solid polymer electrolytes (SPEs) are synthesized for the application of Li-metal batteries. Owing to the special semi-IPN structure and synergistic effects of EO segments and PVDF-HFP, the SIN solid electrolytes demonstrate great flexibility, high ionic conductivity of 2.45 × 10−4 S cm−1 at 25 °C, outstanding thermal stability and broad electrochemical window (4.9 V vs. Li+/Li). In addition, SIN owns excellent electrochemical stability with Li-metal with a low over-potential <70 mV after 1400 h Li plating/stripping. Moreover, benefiting from the stable interfacial contact, LiFePO4|SIN|Li cells provide high discharge capacity of 146 mAh g−1 with superior capacity retention of 96.6 % after 500 cycles at 0.1C under room temperature. Hence, the semi-IPN PEO-based SPEs appear to be promising for use in high-performance solid-state Li-metal batteries.
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