Synthesis of porous CoMoO4 nanorods as a bifunctional cathode catalyst for a Li–O2 battery and superior anode for a Li-ion battery

Abstract

We report the synthesis of porous CoMoO₄ nanorods and their applications in lithium oxygen (Li–O₂) and lithium ion (Li-ion) batteries. The unique porous structures of CoMoO₄ nanorods can promote the permeation of electrolyte and benefit the transport of lithium ion. When employed as the cathode catalyst for a Li–O₂ battery, CoMoO₄ nanorods deliver an improved discharge capacity (4680 mA h g⁻¹), lower charge potential and better cycle stability (41 cycles at 500 mA h g⁻¹ capacity limit) compared with the bare carbon. When employed as an anode in Li-ion batteries, CoMoO₄ nanorods can retain a capacity of 603 mA h g⁻¹ after 300 cycles (400 mA g⁻¹) and exhibit excellent rate capability.