A NiO/NiS2 nanosheet integrated electrode for high area specific capacity alkaline metal battery

Promoting in-situ growth on the Ni foam to form an integrated electrode could prove useful for improving the area-specific capacity and adhesion between the collector and active material. Here, a NiO/NiS2 nanosheet integrated electrode was designed and obtained by a hydrothermal method. The integrated electrode consisted of a mixture of NiS2 and NiO and was in the form of a nanosheet. The electrode showed high area-specific capacities as the anode for alkaline ion batteries and could achieve 1.51 (150th cycle), 0.93 (100th cycle), and 0.11 mAh•cm−2 (30th cycle) for Li+/Na+/K+ storage.