ZIF-8-Based Quasi-Solid-State Electrolyte for Lithium Batteries

Cui Sun, Jin Hua Zhang, Xiang Fei Yuan, Jia Ning Duan, Sheng Wen Deng, Jing Min Fan, Jeng Kuei Chang, Ming Sen Zheng*, Quan Feng Dong*

*Corresponding author for this work

研究成果: Article同行評審

14 引文 斯高帕斯(Scopus)

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.

原文English
頁(從 - 到)46671-46677
頁數7
期刊ACS Applied Materials and Interfaces
11
發行號50
DOIs
出版狀態Published - 18 十二月 2019

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