A Zn–NiO rechargeable battery with long lifespan and high energy density

Abstract

A Zn–NiO rechargeable battery comprising a NiO nanosheet anchored to CNTs as the positive electrode, a zinc plate as the negative one and an alkaline solution of 1 M KOH and 10 mM Zn(Ac)₂ as the electrolyte is reported. It delivers a voltage of ∼1.75 V and a high energy density of 228 W h kg⁻¹ (based on the mass of the positive electrode composite and zinc) with good cycling. It has great promise for practical energy storage applications.