电解质
材料科学
离子电导率
电化学窗口
电化学
化学工程
热稳定性
复合数
离子液体
快离子导体
锂(药物)
电池(电)
阴极
锂电池
锂离子电池
离子
无机化学
离子键合
电极
复合材料
化学
有机化学
热力学
物理化学
内分泌学
催化作用
功率(物理)
工程类
物理
医学
作者
Chengjie Sun,Jin Hua Zhang,Xiang Yuan,Jia Ning Duan,Sheng Wen Deng,Jing Fan,Jeng Kuei Chang,Ming Zheng,Quan Dong
标识
DOI:10.1021/acsami.9b13712
摘要
The quasi-solid-state electrolytes (QSSEs) with an inorganic skeleton, a solid–liquid composite material combining their respective merits, exhibit high ionic conductivity and mechanical strength. However, most quasi-solid electrolytes prepared by immobilizing ionic liquid (IL) or organic liquid electrolyte in inorganic scaffold generally have poor interface compatibility and low lithium ion migration number, which limits its application. Herein, we design and prepare a ZIF-8-based QSSE (ZIF-8 QSSE) in which the ZIF-8 has a special cage structure and interaction with the guest electrolyte to form a composite electrolyte with good ionic conductivity about 1.05 × 10–4 S cm–1 and a higher lithium-ion transference number of about 0.52. With the ZIF-8 QSSE, a protype lithium battery coupled with LiCoO2 cathode shows good electrochemical performances with an initial discharge capacity of 135 mAh g–1 at 50 mA g–1 and a remaining capacity of 119 mAh g–1 after 100 cycles, only 0.119% capacity degradation per cycle. It is worth noting that the ZIF-8-based QSSEs have good thermal stability up to 350 °C that does not show thermal runaway, which is significantly higher than that of a conventional organic liquid battery system.
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