文献类型：期刊文献

英文题名：Constructing compatible LLZTO/PEO interfaces with fast Li+ transport channels for high-performance composite polymer electrolytes

作者：Jin, Yimei[1];Lin, Yiting[1,2,3];Zhang, Zekai[2];Li, Bing[1];Wang, Ru[1];Lian, Cheng[1,2];Han, Xia[2];Liu, Honglai[1,2];Su, Haiping[2];Li, Jingkun[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn & Low Carbon Technol, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China

年份：2026

卷号：540

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20262120763288);WOS:【SCI-EXPANDED(收录号:WOS:001780730900001)】；

基金：We greatly appreciate the financial support of the Shanghai Pilot Program for Basic Research (22TQ1400100-18) , the National Key Research and Development Program of China (2022YFA1503501) , the Shanghai Basic Research Program "Natural Science Foundation" Project (25ZR1402106) .

语种：英文

外文关键词：All-solid-state lithium metal battery; Composite polymer electrolyte; Interfacial engineering; Li+ transport kinetics; Molecular brush grafting

摘要：Composite polymer electrolytes (CPEs) face poor interfacial contact and slow ionic transport owing to the incompatible interface between inorganic fillers and organic polymers, impeding their practical application. Here, we construct a compatible polymer/ceramic interface with fast Li+ transport channels by introducing a gradient 3-sulfopropyl methacrylate (SPMA)-polydopamine (PDA) coating onto the Li6.75La3Zr1.75Ta0.25O12 (LLZTO). The uniform coating of PDA not only creates a compatible interface, but also serves as a "framework" to anchor SPMA molecules. The abundant sulfonic acid groups in SPMA provide weak coordination sites for Li+, thereby accelerating the ionic transport kinetics at the interface between polyethylene oxide (PEO) and LLZTO. Therefore, the resulting SPMA-PDA@LLZTO/PEO CPE exhibits excellent ionic conductivity at 30 degrees C (1.39 x 10(-4) S cm(-1)). Furthermore, the LFP vertical bar vertical bar SPMA-PDA@LLZTO/PEO||Li full cell exhibits remarkable rate capability, delivering a specific discharge capacity of 137 mAh g(-1) at 5C. It also demonstrates long cycling stability with 650 cycles at 0.5C, maintaining a capacity retention rate of 93.3%. This study provides an efficient interfacial engineering strategy for improving the ionic conductivity of CPEs.