Hydrothermal Preparation of Homogeneous Cobalt Oxide Nanomaterials as Stable Anodes for Superior Lithium Ion Batteries

Abstract

In this study, uniform Co3O4 nanoparticles are prepared via a simple and facile hydrothermal synthesis without calcination treatment. When the Co3O4 nanomaterials are investigated as anodes for lithium ion batteries, a good electrochemical property is achieved. Particularly, the reversible capacity of the as-synthesized Co3O4 nanoparticle has a significant growth from 383 mAh g−1 of the initial cycle to 471 mAh g−1 of the 300th cycle at 2 A g−1. Moreover, when it recovers to 50 mA g−1 after different current densities, a superior reversible capacity of 695 mAh g−1 can be reached. Such favorable electrochemical properties will make the as-obtained Co3O4 have a good application prospect as anode material for lithium ion batteries.