材料科学
电解质
电化学窗口
电化学
离子电导率
化学工程
聚合物
阴极
复合数
电池(电)
碳酸乙烯酯
离子键合
复合材料
化学
电极
离子
有机化学
物理化学
物理
工程类
功率(物理)
量子力学
作者
Yongtao Wang,Lingqiao Wu,Zhenxu Lin,Mingxue Tang,Peipei Ding,Xianwei Guo,Zihe Zhang,Shiqi Liu,Boya Wang,Xin Yin,Zonghai Chen,Khalil Amine,Haijun Yu
出处
期刊:Nano Energy
[Elsevier]
日期:2022-06-01
卷期号:96: 107105-107105
被引量:39
标识
DOI:10.1016/j.nanoen.2022.107105
摘要
Polymer electrolyte is one of the important components for developing advanced solid-state lithium batteries (SSLBs). However, the narrow electrochemical stability window restricts the practical application with high-voltage cathodes. Herein, a series of composite solid electrolytes (CSEs), possessing both wide electrochemical stability window (up to 5.0 V vs. Li+/Li) and high ionic conductivity (over 1.35 ×10−3 S/cm at 25 °C), were reported by integrating SiO2 nanoparticles into poly(vinyl ethylene carbonate) polymer electrolyte. The enhanced anti-oxidation performances are mainly caused and confirmed by the local intermolecular interactions of hydrogen bonds in CSE. Based on this CSE, the SSLBs with LiCoO2 cathode present good cycle stability at high voltage, and the capacity retention with 4.5 V cut-off voltage is about 94% after 200 cycles. This work not only proves the importance of intermolecular interactions in CSE, but also provides an effective method for achieving high-energy SSLBs with enhanced interface compatibility between polymer electrolyte and high-voltage cathodes.
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