CuMn2O4 anchored on graphene sheets as a high-performance electrodes for sodium-ion batteries

Abstract

A novel class of CuMn2O4 (CMO) nanoparticles were synthesized by the reflux route method and explored as an anode in sodium-ion batteries. This work deals with the homogenous distribution of CuMn2O4 (CMO) nanoparticles interconnected within the graphene sheet. HR-TEM deceptively evidences the homogeneous distribution and well-defined CuMn2O4 nanoparticles over graphene sheets (CMO/G). This appropriately designed architecture of CMO/G allows adequate void space to assimilate the substantial volume fluctuation during cycling, improve reaction sites, and enhance electron transport, resulting in significant electrochemical performance as an anode in sodium-ion batteries. The CMO/G anode showed a high capacity of 313 mAh g−1 at 100 mA g−1 with 70 % capacity retention after 50 cycles, and under the high current of 2 A g−1, it exhibits as high as 145 mAh g−1. Moreover, the title anode is capable of delivering stable appreciable capacity of 164 mAh g−1 for extended 300 cycles at 1 A g−1. CMO/G composite anode has been validated as a high-efficient anode for sodium-ion battery applications in this study.