A novel chlorine-zinc dual-ion battery

The development of new rechargeable safe batteries featuring high discharge platforms, low cost and environmental protection is one of the most ideal goals to achieve energy storage. Here we develop a novel chlorine-zinc dual-ion battery (C-ZDIB) that uses graphite paper as cathode, zinc as cathode, and (CH3)4NCl + Na2CO3 salt in water as electrolyte. The battery operates by redox reaction between Zn with Zn(OH)42- on the anode side and between ClO- and Cl- on the cathode side. The battery exhibits high discharge platform (about 2.6 V), high discharge capacity (226.2 mAh/g at 0.5 A/g), and long cycle life.