A Graphite∥PTCDI Aqueous Dual‐Ion Battery

Abstract A full cell chemistry of aqueous dual‐ion battery (DIB) was reported, comprising the graphite cathode and 3,4,9,10‐perylenetetracarboxylic diimide (PTCDI) as the anode. This DIB employed a mixture aqueous electrolyte: 5 m tributylmethylammonium (TBMA) chloride plus 5 m MgCl 2 , where [MgCl 3 ] − and TBMA + serve as the charge carriers for cathode and anode of the DIB, respectively. This novel full cell exhibited a specific capacity of around 41 mAh g −1 based on the total active mass of both electrodes with an average operation voltage of 1.45 V and stable cycling for 400 cycles.