Hydrothermal synthesis of rod‐like CoMoO 4 and its excellent properties for the anode of lithium‐ion batteries

CoMoO 4 has attracted extensive interest as an anode for lithium‐ion batteries due to its high theoretical capacity and low cost. Nevertheless, achieving controlled synthesis of CoMoO 4 with definite morphology by simply adjusting a certain synthesis condition is a very meaningful topic. Here, rod‐like CoMoO 4 formed by lamellar stacking was successfully synthesized through the control pH value of one‐step hydrothermal route, and its excellent electrochemical performance was investigated. The rod‐like CoMoO 4 prepared at 190°C and pH = 7 has a high initial discharge capacity of 1,482.8 mAh/g at 200 mA/g. The discharge capacity of 1,041 mAh/g was maintained after 500 cycles, and the capacity retention was 70.2%. The improved electrochemical performance of rod‐like CoMoO 4 can be attributed to the rod structures, which could shorten ion diffusion and electronic conduction pathway, provide more efficient charge storage sites, and alleviate the volume changes during Li + intercalation/deintercalation.