Fig. 1: Designs and functions of conventional static catalyst particles and our flowable catalytic electrolyte.

a Schematic diagram of AFBs with large amounts of flowable electrolytes. b Common catalytic design: conventional static solid-state catalyst particles anchored on the electrode, which only function at the interface. c Proposed catalytic electrolytes strategy: flowable catalytic active sites in electrolytes to enhance interaction both in-electrolyte and at-interface.