The polyvinyl carbonate(PVC)polymer solid electrolyte can be in-situ generated in the assembled lithium-ion battery(LIBs);however,its rigid characteristic leads to uneven interface contact between electrolyte and electrodes.In this work,trimethyl phosphate(TMP)is introduced into the precursor solution for in-situ generation of flexible PVC solid electrolyte to improve the interfacial contact of elec-trolyte and electrodes together with ionic conductivity.The PVC-TMP electrolyte exhibits good interface compatibility with the lithium metal anode,and the lithium symmetric battery based on PVC-TMP electrolyte shows no obvious polarization within 1000 h cycle.As a consequence,the initial interfacial resistance of battery greatly decreases from 278 Ω(LiFePO4(LFP)/PVC/Li)to 93 Ω(LFP/PVC-TMP/Li)at 50℃,leading to an improved cycling stability of the LFP/PVC-TMP/Li battery.Such in-situ preparation of solid electrolyte within the battery is demonstrated to be very significant for commercial application.

Fei Zheng;Hao-Tong Li;Yan-Zhen Zheng;Dan Wang;Ning-Ning Yang;Hai-Yang Ding;Xia Tao

Beijing Key Laboratory of Green Recovery and Extraction of Rare and Precious Metals,University of Science and Technology Beijing,Beijing 100083,China;State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029,China;General Research Institute of Nonferrous Metals,Beijing 100088,China;China Automotive Battery Research Institute Co.,Ltd.,Beijing 101407,China

稀有金属（英文版）

[1]Fei Zheng;Hao-Tong Li;Yan-Zhen Zheng;Dan Wang;Ning-Ning Yang;Hai-Yang Ding;Xia Tao-.Trimethyl phosphate-enhanced polyvinyl carbonate polymer electrolyte with improved interfacial stability for solid-state lithium battery)[J].稀有金属（英文版）,2022(06):1889-1898

Trimethyl

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