Facile preparation of porous erythrocyte-like CuCo2O4 as active material of lithium ion batteries anode
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The porous erythrocyte-like CuCo2O4 was first prepared in this work by a convenient solvothermal post-calcination method used polyvinylpyrrolidone (PVP) as structure-directing agent and ethanol as solvent. When used as anode active materials of Li-ion batteries (LIBs), that 973 Ah/kg of reversible capacity and above 98% of coulombic efficiencies were made by the porous erythrocyte-like CuCo2O4 at 0.5 A/g of current density over 300 times. And cycling at 0.1 A/g of current density the starting specific discharge and charge capacities were 1428 and 1052 Ah/kg higher than theoretical capacity. Excellent cycling performance kept 96% of the reversible capacity retention. The superior rate performances were made at 0.1, 0.2, 0.5, 1, 2 and 0.1 A/g of current densities for 15 times. These exceptional electrochemical performances are all related to its particular compacted morphology and mesoporous spinel structure.
The authors gratefully acknowledge financial support from the Fundamental Research Funds for Central Universities of Central South University (2018zzts803 and 2019zzts693).
Fundamental Research Funds for Central Universities of Central South University (2018zzts803 and 2019zzts693).
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Conflict of interest
There are no conflicts of interest in the submission and the work described was original research that has not been published previously. All authors have consulted the “Information for Authors” and approved to submit this manuscript.
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