V3O7·H2O@CNTs as cathode for high-performance aqueous zinc-ion batteries

Abstract

The V3O7·H2O@CNTs composite was prepared by a hydrothermal method and was employed as a cathode material for aqueous zinc-ion batteries, and the effect of the incorporation of carbon nanotubes on the microstructure and electrochemical properties of V3O7·H2O was investigated. The specific capacity of the composite reached 378.8 mAh/g after 100 cycles at 1A/g at a carbon nanotube addition of 0.05 g. It was higher than that of other composites with carbon nanotube additions. The excellent cycling and multiplicity performance can be attributed to the high pseudocapacitance contribution and the conductivity of the CNTs.