Enhanced Electrochemical performance at high temperature of Cobalt Oxide/Reduced Graphene Oxide Nanocomposites and its application in lithium-ion batteries

Yasmin Mussa,Faheem Ahmed,Muhammad Arsalan,Hatem Abuhimd,Edreese Alsharaeh

doi:10.1038/s41598-018-37032-5

Abstract

We report a microwave irradiation method for the preparation of reduced graphene oxide (RGO) based Co3O4 nanocomposites as anodes for lithium-ion (li-ion) batteries. The Co3O4/RGO nanocomposites displayed good electrochemical behavior as anodic materials for li-ion batteries when compared to pure Co3O4. The Co3O4/RGO nanocomposites with low RGO content resulted in stable electrochemical performance with 100% coulombic efficiency at a high current density of 500 mA/g for 50 cycles. The enhanced capacity of the Co3O4/RGO nanocomposites is due to the incorporation of RGO, which resulted in a four times larger surface area than that of Co3O4. This increased surface area could facilitate the absorption of more lithium ions, resulting in excellent electrochemical performance. Interestingly, the novelty of this work is that the designed li-ion batteries showed stable electrochemical performance even at a high temperature of 100 °C, which might be useful for rechargeable battery applications in a wide temperature range.

Highlights

Lithium-ion batteries have a number of applications as energy storage units mainly in electric vehicles and electronic devices owing to their high capacity, long cycling life, and environmental friendliness[1]
FTIR was used to demonstrate the effect of reduced graphene oxide (RGO) on the chemical structure of the Co3O4 nanoparticles
For the pure Co3O4 nanoparticles, the weak absorption bands at 1052.41 cm−1 and 1251.76 cm−1, are assigned to C-O stretching vibrations, the band at 1649.67 cm−1 and the C-H bands near 2980.64 cm−1 are due to the presence of cobalt acetate (Co(CH3COO2)) residues

Summary

Introduction

Lithium-ion batteries have a number of applications as energy storage units mainly in electric vehicles and electronic devices owing to their high capacity, long cycling life, and environmental friendliness[1].

Results

Conclusion