Synthesis and lithium storage performance of C/NiCo₂O₄ anode derived from MOFs by cation exchange

Abstract

A novel C/NiCo₂O₄ composite derived from Ni-Co-MOF compound is reported. A typical hydrothermal method followed with cation exchange was employed to get the nickel-cobalt binary metal-organic framework. After annealing the Ni-Co-MOF, the carbon containing NiCo₂O₄ composite was obtained successfully. The obtained C/NiCo₂O₄ anode displays superior electrochemical performance with initial specific capacity of 889 mAh g⁻¹ at the current rate of 0.2 C, and 740 mAh g⁻¹ at 0.2 C after 300 cycles. The cation exchange method shows promising application to design other binary/ternary metal oxides for Lithium-ion batteries and supercapacitors.

Keywords:

• Binary MOFs
• binary metal oxide
• cation exchange
• anode material
• lithium-ion battery

Additional information

Funding

This work was supported by the key research and development plan of the Ministry of Science and Technology for new energy vehicles (2017YFB0102900), and Shanghai Pujiang talent plan project (17PJD016).