文献类型：期刊文献

英文题名：Composite solid electrolytes containing single-ion lithium polymer grafted garnet for dendrite-free, long-life all-solid-state lithium metal batteries

作者：Liu, Mian[1];Guan, Xiang[2];Liu, Hongmei[1];Ma, Xiang[1];Wu, Qingping[3];Ge, Sitong[4];Zhang, Haitao[1];Xu, Jun[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Univ Manchester, Dept Mat, Oxford Rd, Manchester M13 9PL, England;[3]Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China;[4]Univ Bristol, Fac Social Sci & Law, Queens Rd, Bristol BS8 1QU, England

年份：2022

卷号：445

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20221912095282);WOS:【SCI-EXPANDED(收录号:WOS:000803690300007)】；

基金：This work was supported by China petroleum engineering con-struction (Group) company (CPECC) .

语种：英文

外文关键词：All -solid -state batteries; Composite solid electrolyte; Garnet modification; Single -ion lithium polymer grafting; High voltage electrode

摘要：Compared with traditional liquid electrolytes, the composite solid electrolytes (CSE) composed of polymer and inorganic particle fillers show better electrochemical stability and safety in lithium-ion batteries. However, the low lithium ion transference number (t(Li+)) and filler agglomeration still threat CSE performance. In response to these threats, we proposed a flexible anion-immobilized modified ceramic-polymer composite solid electrolyte, which significantly increased the lithium ion transference number and showed promising performance after assembled in an all-solid-state battery. Primarily, the surface of Ta-doped garnet Li6.4La3Zr1.4Ta0.6O12 (@LLZTO) was modified by a silane coupling agent bearing C = C bonds, then the lithium single-ion polymer (lithium (4-styrenesulfonyl) (trifluoromethanesulfonyl) imide (LiSTFSI)) was chemically grafted onto the above particles resulting in the ceramic-polymer composite particles (Li@LLZTO). These particles can be uniformly distributed in the polyethylene oxide (PEO) matrix to form composite solid electrolyte (PL@LCSE). It is found that the PL@LCSE promotes the dissociation of lithium salt and reduces the crystallinity of PEO, and shows a relatively high restriction on the migration of anions. Therefore, PL@LCSE shows a high ionic conductivity (1.5 mS & BULL;cm(-1)), a wide electrochemical window (~5.3 V vs. Li/ Li+) and a high t(Li+) (0.77). The Li/PL@LCSE/Li battery exhibits long cycle stability (cycling more than 1000 h). Excellent cycling stability and high rate capability are demon-strated in the all-solid-state batteries with LiFePO4 and LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode. Consequently, the synthesized garnet-lithium single-ion polymer composite micron particles have great potential in the next generation of all-solid-state lithium metal batteries.