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

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

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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(tri-fluoromethanesulfonyl)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 ℃,and excellent interface compatibility with lithium metal anode with a stable polarization over 2000 h.Fur-thermore,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 ℃.This work provides valuable insights into promoting the ionic conductivity of SPEs.

Lithium metal batteriesMetal-organic frameworksSolid polymer electrolytesLithium metal anodeInterfacial compatibility

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

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School of Materials Science and Engineering,North University of China,Taiyuan 030051,China

School of Energy and Power Engineering,North University of China,Taiyuan 030051,China

School of Chemistry and Chemical Engineering,North University of China,Taiyuan 030051,China

School of Mechanical and Mining Engineering,The University of Queensland,Brisbane,QLD 4072,Australia

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Fundamental Research Program of Shanxi ProvinceScience and Technology Cooperation and Exchange Special Project of Shanxi ProvinceKey Laboratory Research Foundation of North University of China and Shanxi Key Laboratory of Advanced Carbon Electrode MaterAustralian Research Council

202103021224177202204041101005202104010910019DP200102573

2024

10.1007/s12598-023-02521-8

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(3)
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