Zinc–Bromine Batteries: High‐Energy Efficiency Membraneless Flowless Zn–Br Battery: Utilizing the Electrochemical–Chemical Growth of Polybromides (Adv. Mater. 52/2019)

In article number 1904524, Sang Ouk Kim, Hee-Tak Kim, and co-workers report a membraneless, flowless aqueous zinc–bromine battery using protonated pyridinic-nitrogen-doped microporous carbon electrodes. The electrodes facilitate the effective conversion of corrosive bromine into polybromides through an electrochemical–chemical growth mechanism, which, along with the subsequent capture of the polybromides, allows the membraneless and flowless operation. This electrode design achieves outstanding cyclability over more than 1000 cycles, a high energy efficiency of 80%, and extremely low cost.