文献类型：期刊文献

英文题名：Influence of Multiarmed Cores on the Performance of Branched Poly(aryl piperidinium)-Based Anion Exchange Membranes for Water Electrolysis

作者：Qian, Jia-Feng[1];Qi, He[1];Li, Deng-Yuan[1,4];Xue, Boxin[2];Wang, Chenyi[3];Liu, Pei-Nian[1,4]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]Shanghai Univ, Sch Life Sci, Shanghai 200444, Peoples R China;[3]Changzhou Univ, Sch Mat Sci & Engn, Jiangsu Key Lab Solar Cell & Energy Storage Mat &, Changzhou 213164, Peoples R China;[4]China Pharmaceut Univ, Sch Pharm, State Key Lab Nat Med, Nanjing 210009, Peoples R China

年份：2026

卷号：14

期号：20

起止页码：9504

外文期刊名：ACS SUSTAINABLE CHEMISTRY & ENGINEERING

收录：;EI(收录号：20262220786717);WOS:【SCI-EXPANDED(收录号:WOS:001761943800001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 52503279 and 92580139). We thank the Research Center of Analysis and Testing at East China University of Science and Technology for their help with the characterization.

语种：英文

外文关键词：anion exchange membranes; multiarmed cores; branched polymers; ionic conductivity; water electrolysis

摘要：While incorporating branched architectures is recognized as an effective strategy for enhancing the performance of poly(aryl piperidinium)-based anion exchange membranes (AEMs), systematic studies into how multiarmed cores influence performance remain inadequate. Herein, we report the construction of a series of branched poly(aryl piperidinium) AEMs from multiarmed (1,3,5-triphenylbenzene, tetraphenylmethane, and 9,9-diphenylfluorene) cores and a systematic evaluation of how they affect membrane properties, including free volume, water uptake, swelling ratio, ionic conductivity, and alkaline stability. Four-armed cores were found to yield higher fractional free volumes and specific surface areas than their three-armed counterparts. Moreover, membranes based on 9,9-diphenylfluorene exhibited superior performance, which is attributable to their hybrid rigid-flexible branching structures. Specifically, the optimized QPTPip-DPF-10 membrane delivered an exceptional ionic conductivity of 181.4 mS cm(-1) and retained 84.6% of its ionic conductivity after 1080 h in 2 M NaOH at 80 degrees C. A current density of 2113.2 mA cm(-2) was attained at 2.0 V and 80 degrees C, along with stable operation for more than 720 h at 500 mA cm(-2) when used in an AEM water electrolyzer. This study highlights the critical importance of branched-core selection and provides molecular-level design guidelines for advanced AEMs.