Permselectivity and Ionic Conductivity Study of Na⁺ and Br^- Ions in Graphene Oxide-Based Membranes for Redox Flow Batteries.

ABSTRACT: Permselectivity of a membrane is central for the development of electrochemical energy storage devices with two redox couples, such as redox flow batteries (RFBs). In RFBs, Br₃^-/Br^- couple is often used as a catholyte which can cross over to the anolyte, limiting the battery's lifetime. Naturally, the development of permselective membranes is essential to the success of RFBs since state-of-the-art perfluorosulfonic acid (PFSA) is too costly. This study investigates membranes of graphene oxide (GO), polyvinylpyrrolidone (PVP), and imidazole (Im) as binder and linker, respectively. The GO membranes are compared to a standard PFSA membrane in terms of ionic conductivity (Na⁺) and permselectivity (exclusion of Br^-). The ionic conduction is

SUBMITTER: Flack R 

PROVIDER: S-EPMC10456580 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature