文献类型：期刊文献

英文题名：Superior Room-Temperature Anhydrous Proton Conduction in 3D Porous Benzimidazole Membranes Enabled by Strong Acid Confinement

作者：Zhang, Jin[1];Zhao, Nianyu[2,3];Liu, Qian[1];Li, Siyao[1];Zhuang, Linzhou[1];Qiao, Qiao[2,3];Shao, Dongsheng[2,3];Ren, Xiao-Ming[2,3];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Nanjing Tech Univ, State Key Lab Mat Oriented Chem Engn, Nanjing 211816, Peoples R China;[3]Nanjing Tech Univ, Coll Chem & Mol Engn, Nanjing 211816, Peoples R China

年份：2026

卷号：65

期号：4

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20254919625677);WOS:【SCI-EXPANDED(收录号:WOS:001625358800001)】；

基金：The authors gratefully acknowledge the financial support from the following foundations and programs: the Shanghai Pilot Program for Basic Research (Grant No. 22TQ1400100-4), the National Natural Science Foundation of China (Grant No. 22425802 to X.Z.), the China Postdoctoral Science Foundation (Grant No. 2024M760911 to Z.J.), the National Key R&D Program of China (Grant No. 2021YFB3801301), and the National Natural Science Foundation of China (Grant No. 22073047).

语种：英文

外文关键词：Anhydrous proton exchange membrane; Benzimidazole functionalization; Covalent triazine framework; Intrinsic micropos structure; Superior anhydrous proton conduction

摘要：Phosphoric acid-doped polybenzimidazole (PA-PBI) is a leading anhydrous proton exchange membrane (APEM) material for non-aqueous electrochemical technologies. However, its flexible linear backbone results in poorly defined and acid-sensitive proton conduction pathways, compromising durability and limiting the use of stronger acids for conductivity enhancement. To overcome these limitations, we designed and synthesized a novel self-standing, 3D benzimidazole-functionalized covalent triazine framework membrane (OBI-CTFM) via a sol-gel approach. This membrane exhibits exceptional mechanical strength, strong acid resistance, and an intrinsic microporous structure with alkaline imidazole groups that enable effective acid uptake and confinement. Remarkably, the methanesulfonic acid-treated membrane (MSA@OBI-CTFM) achieved a record-high anhydrous proton conductivity (>10(-2) S cm(-1)) near room temperature, surpassing most reported anhydrous proton conductors. As an APEM in proton batteries, this membrane enabled remarkable cycling stability (similar to 7000 cycles) and high specific capacity. Our work demonstrates the critical role of 3D porous structures in APEMs and paves the way for advanced PBI membranes in electrochemical applications.