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

We report a microwave irradiation method for the preparation of reduced graphene oxide (RGO) based Co 3 O 4 nanocomposites as anodes for lithium-ion (li-ion) batteries. The Co 3 O 4 /RGO nanocomposites displayed good electrochemical behavior as anodic materials for li-ion batteries when compared to pure Co 3 O 4 . The Co 3 O 4 /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 Co 3 O 4 /RGO nanocomposites is due to the incorporation of RGO, which resulted in a four times larger surface area than that of Co 3 O 4 . 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.