文献类型：期刊文献

中文题名：Suppression of current-induced membrane discharge of bipolar membranes by regulating ion crossover transport

作者：Tingting Yu[1];Haolan Tao[1,2];Jingkun Li[2];Cheng Lian[1,2];Honglai Liu[1,2]

机构：[1]State Key Laboratory of Chemical Engineering,Shanghai Engineering Research Center of Hierarchical Nanomaterials,School of Chemical Engineering,East China University of Science and Technology,Shanghai 200237,China;[2]School of Chemistry and Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China

年份：2024

卷号：96

期号：9

起止页码：387

中文期刊名：Journal of Energy Chemistry

外文期刊名：能源化学（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2023_2024】；PubMed;

基金：sponsored by the National Key R&D Program of China(2022YFB4602101);the Fundamental Research Funds for the Central Universities(2022ZFJH004 and 2024SMECP05);the National Natural Science Foundation of China(22278127 and 22378112);the Shanghai Pilot Program for Basic Research(22T01400100-18);the Postdoctoral Fellowship Program of CPSF(GZC20230801)。

语种：英文

中文关键词：Bipolar membranes;Current-induced membrane discharge;Salt ion crossover;Diffusion-migration-reaction process

摘要：Bipolar membranes(BPMs)exhibit the unique capability to regulate the operating environment of electrochemical system through the water dissociation-combination processes.However,the industrial utilization of BPMs is limited by instability and serious energy consumption.The current-induced membrane discharge(CIMD)at high-current conditions has a negative influence on the performance of anion-exchange membranes,but the underlying ion transport mechanisms in the BPMs remain unclear.Here,the CIMD-coupled Poisson-Nernst-Planck(PNP)equations are used to explore the ion transport mechanisms in the BPMs for both reverse bias and forward bias at neutral and acid-base conditions.It is demonstrated that the CIMD effect in the reverse-bias mode can be suppressed by enhancing the diffusive transport of salt counter-ions(Na^(+)and Cl^(?))into the BPMs,and that in the forward-bias mode with acid-base electrolytes can be suppressed by matching the transport rate of water counter-ions(H_(3)O^(+)and OH^(?)).Suppressing the CIMD can promote the water dissociation in the reverse-bias mode,as well as overcome the plateau of limiting current density and reduce the interfacial blockage of salt co-ions(Cl^(?))in the anion-exchange layer in the forward-bias mode with acid-base electrolytes.Our work highlights the importance of regulating ion crossover transport on improving the performance of BPMs.