Open AccessAnion exchange membranes for electrochemical oxidation-reduction energy storage system
Author(s) -
Patricia M. O’Donnell,
D. W. Sheibley,
R. F. Gahn
Publication year - 1977
Publication title -
osti oai (u.s. department of energy office of scientific and technical information)
Language(s) - English
Resource type - Reports
DOI - 10.2172/7087985
Subject(s) - membrane , redox , copolymer , electrochemistry , chemistry , chloride , ion , slurry , divinylbenzene , inorganic chemistry , energy storage , ion exchange , chemical engineering , polymer chemistry , electrode , materials science , organic chemistry , styrene , polymer , biochemistry , power (physics) , physics , quantum mechanics , engineering , composite material
Oxidation-reduction couples in concentrated solutions separated by appropriate ion selective membranes are an attractive approach to bulk electrical energy storage. A key problem is the development of the membrane. Four promising types of anionic membranes which were developed and evaluated for the Redox Energy Storage System are discussed. The copolymers of ethyleneglycoldimethacrylate with either 2-vinylpyridine or vinylbenzyl chloride gave stable resistance values compared to the copolymer of vinylbenzlchloride and divinylbenzene which served as the baseline membrane. A polyvinylchloride film aminated with tetraethylenepentamine had a low resistance but a high iron transfer rate. A slurry coated vinylpyridine had the lowest iron transfer rate. All these membranes functioned well in laboratory cells at ambient temperatures with the acidic chloride oxidant/reductant system, Fe III, Fe II/Ti III, Ti IV.
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