In a new study published in Nature Energy, a research group led by Prof. Xianfeng Li from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences (CAS) collaborated with Prof. Qiang Fu’s group from DICP to construct a multi-electron transfer cathode based on bromine and iodine, attaining a specific capacity of more than 840 Ah/L and an energy density of up to 1200 Wh/L based on catholyte in full battery testing.