High-performance polymer electrolyte membranes incorporated with 2D silica nanosheets in high-temperature proton exchange membrane fuel cells  

作　　者：Zunmin Guo Jianuo Chen Jae Jong Byun Rongsheng Cai Maria Perez-Page Madhumita Sahoo Zhaoqi Ji Sarah J.Haigh Stuart M.Holmes 

机构地区：[1]Department of Chemical Engineering and Analytical Science,The University of Manchester,M139PL,United Kingdom [2]Department of Materials,The University of Manchester,M139PL,United Kingdom

出　　处：《Journal of Energy Chemistry》2022年第1期323-334,I0009,共13页能源化学（英文版）

基　　金：the EPSRC grant EP/009050/1;supported by the Henry Royce Institute for Advanced Materials which is funded by EPSRC grants EP/S019367/1,EP/P025021/1,EP/R00661X/1 and EP/P025498/1.

摘　　要：Silica nanosheets(SN)derived from natural vermiculite(Verm)were successfully incorporated into polyethersulfone-polyvinylpyrrolidone(PES-PVP)polymer to fabricate high-temperature proton exchange membranes(HT-PEMs).The content of SN filler was varied(0.1-0.75 wt%)to study its influence on proton conductivity,power density and durability.Benefiting from the hydroxyl groups of SN that enable the formation of additional proton-transferring pathways,the inorganic-organic membrane displayed enhanced proton conductivity of 48.2 mS/cm and power density of 495 mW/cm^(2) at 150℃ without humidification when the content of SN is 0.25 wt%.Furthermore,exfoliated SN(E-SN)and sulfonated SN(S-SN),which were fabricated by a liquid-phase exfoliation method and silane condensation,respectively,were embedded in PES-PVP polymer matrix by a simple blending method.Due to the significant contribution from sulfonic groups in S-SN,the membrane with 0.25 wt%S-SN reached the highest proton conductivity of51.5 mS/cm and peak power density of 546 mW/cm^(2) at150℃,48%higher than the pristine PES-PVP membranes.Compared to unaltered PES-PVP membrane,SN added hybrid composite membrane demonstrated excellent durability for the fuel cell at 150℃.Using a facile method to prepare 2D SN from natural clay minerals,the strategy of exfoliation and functionalization of SN can be potentially used in the production of HT-PEMs.

关 键 词：Silica nanosheets VERMICULITE High-temperature proton exchange membrane Proton conductivity 

分 类 号：TB383.2[一般工业技术—材料科学与工程] TM911.4[电气工程—电力电子与电力传动]