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AssigneeUniversity of South Carolina
InventorsBRIAN C. BENICEWICZ, LAURA MURDOCK, LIHUI WANG, FEI HUANG, ANDREW PINGITORE
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Disclosed are redox flow battery membranes, redox flow batteries incorporating the membranes, and methods of forming the membranes. The membranes include a polybenzimidazole gel membrane that is capable of incorporating a high liquid content without loss of structure that is formed according to a process that includes in situ hydrolysis of a polyphosphoric acid solvent. The membranes are imbibed with a redox flow battery supporting electrolyte such as sulfuric acid and can operate at very high ionic conductivities of about 100 mS/cm or greater. Redox flow batteries incorporating the PBI-based membranes can operate at high current densities of about 100 mA/cm2 or greater.
A method for forming a redox flow battery membrane comprising:
A redox flow battery membrane comprising:
A redox flow battery comprising a polybenzimidazole gel membrane and a redox flow battery supporting electrolyte imbibed within the polybenzimidazole gel membrane, the polybenzimidazole gel membrane being a self-supporting membrane capable of incorporating a liquid content of about 60 wt. % or more without loss of structure, wherein the redox flow battery is capable of operation at a current density of about 100 mA/cm2 or greater.
Dependencies are inferred from the claim text.