|About this Abstract
||Materials Science & Technology 2020
||Advances in Synthesis and Integration Methods for Enhanced Properties, and Applications in Emerging Nanomaterials
||Development of High-performance Ion Selective Membranes for Redox Flow Batteries
||Sangil Kim, Tongshuai Wang, Natalie Fifield, Chulsung Bae
|On-Site Speaker (Planned)
Development of a low cost, reliable energy storage technology with high energy density is of great interest to our society. In particular, highly efficient large-scale electrochemical energy storage, i.e. redox flow batteries (RFBs), has been an important issue to enhance the efficiency and quality of electrical grid. Polymeric ion exchange membranes (IEMs) with good ion conductivity and high ion selectivity are highly desirable for the development of high performance RFBs. Here, we present our recent studies on establishing the relationships of IEMs and their electrochemical membrane properties with focus on RFBs (e.g. lithium polysulfide, all-vanadium). Our work demonstrates that a series of novel sulfonated aromatic polymer membranes and their nanocomposite membranes can provide high ion conductivity (e.g. Li+, H+) as well as selectivity which surpass the traditional ion conductivity-selectivity trade-off. Our systematic studies of polymer structures, morphologies, and properties can elucidate structure–property relationships at the molecular level.