文献类型：期刊文献

英文题名：Multiple ionic conduction highways and good interfacial stability of ionic liquid-encapsulated cross-linked polymer electrolytes for lithium metal batteries

作者：Tian, Liying[1];Wang, Meihuang[1];Liu, Ying[2,3];Su, Zhe[1];Niu, Bo[1];Zhang, Yayun[1];Dong, Panpan[4];Long, Donghui[1]

机构：[1]East China Univ Sci & Technol, Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Ctr Computat Chem, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[4]Washington State Univ, Sch Mech & Mat Engn, Pullman, WA 99164 USA

年份：2022

卷号：543

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20223012396266);WOS:【SCI-EXPANDED(收录号:WOS:000844590300001)】；

基金：Acknowledgements This work was supported by National Natural Science Foundation of China (No. 22078100, No. 21878091 and No. 22008073) .

语种：英文

外文关键词：Cross -linked polymer electrolyte; In -situ polymerization; Ionic liquid; Interfacial compatibility; Solid-state lithium metal batteries

摘要：PEO-based electrolytes are promising for solid-state lithium metal batteries, but their low ionic conductivity and unstable interfacial compatibility with electrodes are the bottlenecks restricting their further applications. Herein, a unique ionic liquid (Pyr14TFSI)-encapsulated cross-linked polymer electrolyte with abundant ether-oxygen repeat units (C-SPE-IL) is proposed and prepared through an in-situ thermal polymerization process. The Pyr14+ cations of ionic liquid present a stronger affinity towards ether-oxygen groups by means of tight coordinated interactions, which promotes ionic liquid encapsulated uniformly in the polymer matrix to release more mobile Li ions into ionic liquid and create multiple ionic conduction highways in both ionic liquid and polymer matrix. The C-SPE-IL shows a much higher ionic conductivity of 3.98 x 10-4 S/cm at 30 degrees C. Moreover, tight interfaces with LiF- and Li3N- rich components between C-SPE-IL and Li anode are constructed to ensure effective suppression of lithium dendrites during cycling. The LiFePO4/Li batteries using C-SPE-IL present stable cycling performances at both 35 degrees C and 60 degrees C. This work provides a facile and accessible approach to design novel SPE with both ionic conduction highways and good interfacial stability for high-performance solid-state lithium metal batteries.