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Published in: Rare Metals 3/2024

16-12-2023 | Original Article

ZIF-8-functionalized polymer electrolyte with enhanced performance for high-temperature solid-state lithium metal batteries

Authors: Jin-Fang Zhang, Yuan-Yuan Wang, Xiao-Feng Li, Gen-Yan Zhang, Ying Li, Rong Liu, Sheng-Liang Hu, Tuo-Ping Hu, Ruth Knibbe, Qing-Bing Xia

Published in: Rare Metals | Issue 3/2024

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Abstract

Solid polymer electrolytes (SPEs) with high ionic conductivity are desirable for solid-state lithium metal batteries (SSLMBs) to achieve enhanced safety and energy density. Incorporating nanofillers into a polymeric matrix to develop nanocomposite solid electrolytes (NCSEs) has become a promising method for improving the ionic conductivity of the SPEs. Here, a novel ZIF-8-functionalized NCSE was prepared for high-temperature SSLMBs using an in situ radical polymerization method. It is found that the ZIF-8 nanoparticles could reduce the crystallinity of polymer segments and offer a Lewis acid surface that promotes the dissociation of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and stabilizes the TFSI anion movement. Thus, the as-prepared NCSE exhibits an outstanding ionic conductivity of 1.63 × 10–3 S·cm−1, an electrochemical stability window of 5.0 V at 80 °C, and excellent interface compatibility with lithium metal anode with a stable polarization over 2000 h. Furthermore, the assembled SSLMBs with LiFePO4 cathode show dendrite-free Li-metal surface, good rate capability, and stable cycling stability with a capacity retention of 70% over 1000 cycles at a high temperature of 80 °C. This work provides valuable insights into promoting the ionic conductivity of SPEs.

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Appendix
Available only for authorised users
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Metadata
Title
ZIF-8-functionalized polymer electrolyte with enhanced performance for high-temperature solid-state lithium metal batteries
Authors
Jin-Fang Zhang
Yuan-Yuan Wang
Xiao-Feng Li
Gen-Yan Zhang
Ying Li
Rong Liu
Sheng-Liang Hu
Tuo-Ping Hu
Ruth Knibbe
Qing-Bing Xia
Publication date
16-12-2023
Publisher
Nonferrous Metals Society of China
Published in
Rare Metals / Issue 3/2024
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-023-02521-8

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