Polymeric membranes with aligned zeolite nanosheets for sustainable energy storage

Yongsheng Xia, Hongyan Cao, Fang Xu, Yuxin Chen, Yu Xia, Dezhu Zhang, Liheng Dai, Kai Qu, Cheng Lian, Kang Huang (), Weihong Xing, Wanqin Jin () and Zhi Xu ()
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Yongsheng Xia: Nanjing Tech University
Hongyan Cao: Nanjing Tech University
Fang Xu: East China University of Science and Technology
Yuxin Chen: East China University of Science and Technology
Yu Xia: Nanjing Tech University
Dezhu Zhang: Nanjing Tech University
Liheng Dai: East China University of Science and Technology
Kai Qu: East China University of Science and Technology
Cheng Lian: East China University of Science and Technology
Kang Huang: Nanjing Tech University
Weihong Xing: Nanjing Tech University
Wanqin Jin: Nanjing Tech University
Zhi Xu: East China University of Science and Technology

Nature Sustainability, 2022, vol. 5, issue 12, 1080-1091

Abstract: Abstract Membrane technologies with low environmental impacts and ease of use have a wide spectrum of applications, with the potential to provide more sustainable solutions in domains such as water, energy and pollution treatment. However, the design of membranes is subject to a trade-off between ion conductivity and selectivity. Here we show a composite polymeric membrane that breaks this dilemma and supports both high proton conductivity (80.1 mS cm−1) and good vanadium ion selectivity (2.01 × 105 S min cm−3). Underlying this synthetic success is a flow-processing technique through which zeolite nanosheet fillers are oriented in a preferred direction throughout a polymer Nafion matrix. As a result, pairing this aligned membrane with a vanadium flow battery leads to a high energy efficiency of >80% at 200 mA cm−2 and remarkable stability over 1,000 cycles. This work enables the design of membranes that combine otherwise mutually exclusively properties for many possible applications beyond energy storage.

Date: 2022
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DOI: 10.1038/s41893-022-00974-w

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