文献类型：期刊文献

英文题名：Efficient Shuttling of Li+ by an Amide at the COF/PEO Interface in a Composite Solid Polymer Electrolyte

作者：Sun, Yaping[1];Li, Bing[2];Li, Jing[2];Jin, Yimei[2];Lian, Cheng[1];Liu, Honglai[1,2];Li, Jingkun[1];Su, Haiping[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2026

卷号：9

期号：6

起止页码：3386

外文期刊名：ACS APPLIED ENERGY MATERIALS

收录：;EI(收录号：20261320335660);WOS:【SCI-EXPANDED(收录号:WOS:001708801400001)】；

基金：This work was financially supported by the Shanghai Pilot Program for Basic Research (22TQ1400100-18), the National Key R&D Program of China (2022YFA1503501), and the Shanghai Basic Research Program "Natural Science Foundation" Project (25ZR1402106).

语种：英文

外文关键词：PEO-based solid polymer electrolyte; amide; interfacial ion transport; covalentorganic framework; all-solid-state lithium-metal battery

摘要：Covalent organic frameworks (COFs)/poly(ethylene oxide) (PEO) solid electrolytes offer bright application prospects in all-solid-state lithium-metal batteries (ASSLBs), while they struggle with low ionic conductivity due to poor interfacial Li+ transport kinetics. This work employs acetamide (EA) as a shuttle to transfer Li+ at COF/PEO interfaces via the synergistic EA-PEO, EA-COF, and EA-Li+ interactions, thereby constructing continuous channels for fast Li+ transport. The resulting EA-modified COF/PEO solid electrolyte delivers an ionic conductivity of 1.01 & times; 10-4 S & centerdot;cm-1 at 30 degrees C. In addition, the synergistic interactions induced by EA promote the dissociation of lithium salt, leading to a LiF- and Li3N-rich solid electrolyte interface (SEI) layer and thus enhanced interfacial stability. As a result, the LiFePO4-based ASSLB assembled with the PEO/LiTFSI-COF/EA solid electrolyte demonstrates exceptional cycling stability with 70.34% capacity retention over 1200 cycles at 1 C and 60 degrees C. Our work provides a powerful strategy to facilitate interfacial ion transport and reinforce long-term stability in solid polymer electrolytes.