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

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

Resources Chemicals and Materials (Sep 2022)

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

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

Affiliations

Bengui Zhang: College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China; State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China; Corresponding authors.
Xueting Zhang: College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Qian Liu: State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China
Minghui Zhao: College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Zhirong Yang: College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Yanshi Fu: College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Enlei Zhang: College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Kangjun Wang: College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China; Corresponding authors.
Guosheng Wang: College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Zhigang Zhang: College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Shouhai Zhang: State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China; Corresponding authors.

Journal volume & issue: Vol. 1, no. 3
pp. 268 – 274

Abstract

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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.

Published in Resources Chemicals and Materials

ISSN: 2772-4433 (Online)
Publisher: KeAi Communications Co., Ltd.
Country of publisher: China
LCC subjects: Technology: Chemical technology
Website: https://www.keaipublishing.com/en/journals/resources-chemicals-and-materials/

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