公开(公告)号：US20210202972A1

公开(公告)日：2021-07-01

申请号：US17269835

申请日：2020-03-19

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Xuemei WU ,  Gaohong HE ,  Xiaozhou WANG ,  Xiaoming YAN ,  Tiantian LI ,  Wanting CHEN ,  Xiangcun LI ,  Wu XIAO ,  Xiaobin JIANG ,  Fujun CUI ,  Yan DAI ,  Xuehua RUAN

IPC: H01M8/1072 ,  C08G73/18 ,  H01M8/1067

Abstract: The present invention belongs to the field of alkaline polymer electrolyte membranes, and relates to a comb-shaped structure polybenzimidazole anion exchange membrane with high conductivity and preparation method thereof. In the invention, firstly, polybenzimidazole is grafted with the non-cationic side chains to the max grafting rate to synthesize the de-protonated comb-shaped polybenzimidazole material, avoiding the N—H in benzimidazole forms ionic binding with cationic functional groups, which will reduce the reactivity and mobility of cationic groups; then react de-protonated comb-shaped polybenzimidazole with quaternization reagent to attach the pendent side chain with cationic functional groups, making it easy to aggregate to form ion clusters and hydrophilic/hydrophobic microphase separation. The anion exchange membrane prepared in this invention has excellent conductivity, mechanical properties and alkaline stability.