Swelling-induced morpholine functionalized adamantane-containing poly(aryl ether ketone)membranes for vanadium flow batteries  

作　　者：Bengui Zhang Xueting Zhang Qian Liu Minghui Zhao Zhirong Yang Yanshi Fu Enlei Zhang Kangjun Wang Guosheng Wang Zhigang Zhang Shouhai Zhang 

机构地区：[1]College of Chemical Engineering,Shenyang University of Chemical Technology,Shenyang 110142,China [2]State Key Laboratory of Fine Chemicals,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China

出　　处：《Resources Chemicals and Materials》2022年第3期268-274,共7页资源化工与材料（英文）

基　　金：supports from the National Natural Science Foundation of China(21444006,21706164);the State Key Laboratory of Fine Chemicals,Dalian University of Technology(KF2106);Liaoning Provincial Education Department(LJ2019005);Natural Science Foundation of Liaoning Province(2021-NLTS-12-01);Liaoning Revitalization Talents Program(XLYC1907029);Liaoning Provincial Science and Technology Department(2019-MS-261)is greatly appreciated.

摘　　要：Swelling-induced morpholine functionalized adamantane-containing poly(aryl ether ketone) (MAPEK) membranes were prepared for vanadium flow batteries. MAPEK membranes were prepared from chloromethylated polymer and morpholine and further swelling-induced with hot phosphoric acid to obtain membranes with enhanced ionic conductivity. The swelling, selectivity, and ionic conductivity of MAPEK membranes were regulated by varying the swelling temperature. Selective swelling-induced microphase separation in MAPEK membranes, forming wider ion transport pathways and resulting in low area resistance. The unique rigid adamantane-containing backbone limited the swelling of membranes. Consequently, MAPEK membranes showed excellent selectivity and conductivity (vanadium ion permeability coefficient of MAPEK membranes was lower than 3.82 × 0−7 cm2min−1) (Nafion212 membrane, 42.5 × 0−7 cm2min−1), and MAPEK-150 membrane exhibited low area resistance (0.17 Ωcm2). The vanadium flow batteries (VFB) with MAPEK-150 membrane exhibited high energy efficiency (91.1% at 80 mAcm−2, 81.4% at 200 mAcm−2). Furthermore, MAPEK membranes showed good stability in VFB and oxidative electrolytes. The swelling-induced method utilized in this work is a versatile and facile method to enhance the conductivity of ion-exchange membranes.

关 键 词：Vanadium flow battery Energy storage Membrane Swelling-induced Conductivity 

分 类 号：O62[理学—有机化学]