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Polymerized-ionic-liquid-based solid polymer electrolyte for ultra-stable lithium metal batteries enabled by structural design of monomer and crosslinked 3d network

引用

Materials Reports(Energy) 2025年第1期5卷 61-69页

作者： Lingwang Liu Jiangyan Xue Yiwen Gao Shiqi Zhang Haiyang Zhang Keyang Peng Xin Zhang Suwan Lu Shixiao Weng Haifeng Tu Yang Liu Zhicheng Wang Fengrui Zhang daosong Fu Jingjing Xu Qun Luo Xiaodong Wu School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei230026China i-Lab Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of SciencesSuzhou215123China School of Materials Science and Engineering Shanghai UniversityShanghai200444China Tianmu Lake Institute of Advanced Energy Storage Technologies Liyang213300China Institute of Physics Chinese Academy of Sciences Beijing100190China College of Material Science and Engineering Hohai UniversityChangzhou213022China

Solid polymer electrolytes(SPEs)have attracted much attention for their safety,ease of packaging,costeffectiveness,excellent flexibility and ***-dioxolane(PdOL)is one of the most promising matrix materials of SPEs due to its remarkable compatibility with lithium metal anodes(LMAs)and suitability for in-situ ***,poor thermal stability,insufficient ionic conductivity and narrow electrochemical stability window(ESW)hinder its further application in lithium metal batteries(LMBs).To ameliorate these problems,we have successfully synthesized a polymerized-ionic-liquid(PIL)monomer named dIMTFSI by modifying dOL with imidazolium cation coupled with TFSI^(-)anion,which simultaneously inherits the lipophilicity of dOL,high ionic conductivity of imidazole,and excellent stability of *** the tridentate crosslinker trimethylolpropane tris[3-(2-methyl-1-aziridine)propionate](TTMAP)was introduced to regulate the excessive Li^(+)-O coordination and prepare a flame-retardant SPE(dT-SPE)with prominent thermal stability,wide ESW,high ionic conductivity and abundant Lit transference numbers(t_(Li+)).As a result,the LiFePO_(4)|dT-SPE|Li cell exhibits a high initial discharge specific capacity of 149.60 mAh g^(-1)at 0.2C and 30℃with a capacity retention rate of 98.68%after 500 *** work provides new insights into the structural design of PIL-based electrolytes for long-cycling LMBs with high safety and stability.

关键词： Polymerized ionic liquid Solid polymer electrolyte Structural design crosslinked 3d network Lithium metal battery

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