材料科学
电化学窗口
离子电导率
复合数
锂(药物)
化学工程
电解质
电导率
相容性(地球化学)
快离子导体
电化学
复合材料
电极
化学
物理化学
内分泌学
工程类
医学
作者
Yanfang Zhai,Guanming Yang,Zhong Zeng,Shufeng Song,Shuai Li,Ning Hu,Weiping Tang,Wen Zhang,Lü Li,Janina Molenda
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2021-07-20
卷期号:4 (8): 7973-7982
被引量:31
标识
DOI:10.1021/acsaem.1c01281
摘要
Exploring quasi-solid electrolytes with superior ionic conductivities, wide electrochemical stability window, desirable compatibility toward lithium metal, and facile processability for high-energy lithium metal batteries remains a challenge. In this work, all of these issues are fully addressed via a composite hybrid design, of which poly(ethylene oxide) (PEO) is used as a polymeric host and guarantees the interfacial compatibility toward lithium metal, highly conductive and thermally stable ionogel aims at suppressing PEO crystallization and enhancing conductivity, and garnet conductor enhances mechanical and electrochemical stabilities. Such a composite hybrid design yields the required quasi-solid electrolyte, which not only shows a high ionic conductivity of 7.4 × 10–4 S cm–1 at 25 °C but also extends the electrochemical stability window to 5.5 V vs Li/Li+, demonstrated with the interacted and monolithic structure of the composite hybrid quasi-solid electrolyte by XPS. Moreover, the composite hybrid quasi-solid electrolyte suppresses dendrite growth with a current density up to 0.7 mA cm–2. The quasi-solid Li∥LiNi0.5Co0.2Mn0.3O2 and Li∥LiFePO4 cells using this composite hybrid quasi-solid electrolyte are demonstrated. This study suggests that engineering integration of ionogel, polymer, and inorganic conductor offers an alternative to explore new electrolytes for lithium metal batteries.
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