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The Structure–Activity Relationship in Membranes for Vanadium Redox Flow Batteries
Advanced Sustainable Systems ( IF 6.5 ) Pub Date : 2019-06-21 , DOI: 10.1002/adsu.201900020 Shengjuan Jiang 1 , Shanfu Lu 1 , Yan Xiang 1 , San Ping Jiang 2
Advanced Sustainable Systems ( IF 6.5 ) Pub Date : 2019-06-21 , DOI: 10.1002/adsu.201900020 Shengjuan Jiang 1 , Shanfu Lu 1 , Yan Xiang 1 , San Ping Jiang 2
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Vanadium redox flow batteries (VRFBs) are regarded as one of the most promising electrochemical technologies for grid‐connected renewable energy storage systems. The performance of VRFBs, however, strongly depends on the membrane, one of the key components of VRFBs with critical dual functions of promotion of diffusion of active species (H+, H3O+, SO42−, or SO4H−) and inhibition of crossover of vanadium ions. This is intrinsically related to the microstructure of membranes. For example, large and connected ionic clusters or pores in membranes are favorable for the ion transfer, but detrimental to the ion selectivity. While small and isolated hydrophilic ion clusters or pores suppress the water uptake and ion transfer, the decreased swelling ratio would enhance chemical stability of membrane. Thus, comprehensive strategies are required to realize the optimal balance between the ion selectivity, proton conductivity, and chemical stability. This review focuses on the effects of microstructure of membranes on the ion transfer and the chemical stability, including introduction of the rigid groups, electron‐withdrawing groups, and hydrophobic backbones, are reviewed. The prospect of the development of membranes with high ion selectivity and high‐performance VRFBs is discussed.
中文翻译：
钒氧化还原液流电池膜的结构-活性关系
钒氧化还原液流电池（VRFB）被认为是并网可再生能源存储系统中最有希望的电化学技术之一。VRFBs的性能，但是，强烈地依赖于膜，并有晋升活性种（H的扩散的关键双重功能VRFBs的关键部件之一+，H 3 ö +，SO 4 2-，或SO 4 ħ -）并抑制钒离子的穿越。这本质上与膜的微结构有关。例如，膜中的大且相连的离子簇或孔对于离子转移是有利的，但不利于离子选择性。虽然较小且孤立的亲水性离子簇或孔抑制了水的吸收和离子转移，但溶胀率的降低将增强膜的化学稳定性。因此，需要综合策略来实现离子选择性，质子传导性和化学稳定性之间的最佳平衡。这篇综述集中在膜的微结构对离子转移和化学稳定性的影响上，包括刚性基团，吸电子基团和疏水性主链的引入。
更新日期：2019-09-09
中文翻译：
钒氧化还原液流电池膜的结构-活性关系
钒氧化还原液流电池（VRFB）被认为是并网可再生能源存储系统中最有希望的电化学技术之一。VRFBs的性能，但是，强烈地依赖于膜，并有晋升活性种（H的扩散的关键双重功能VRFBs的关键部件之一+，H 3 ö +，SO 4 2-，或SO 4 ħ -）并抑制钒离子的穿越。这本质上与膜的微结构有关。例如，膜中的大且相连的离子簇或孔对于离子转移是有利的，但不利于离子选择性。虽然较小且孤立的亲水性离子簇或孔抑制了水的吸收和离子转移，但溶胀率的降低将增强膜的化学稳定性。因此，需要综合策略来实现离子选择性，质子传导性和化学稳定性之间的最佳平衡。这篇综述集中在膜的微结构对离子转移和化学稳定性的影响上，包括刚性基团，吸电子基团和疏水性主链的引入。
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