Enhancement of electrochemical performance of lithium manganese oxide with graphene for aqueous supercapabattery

• Main Authors: Low, J.r., Lim, H.N., Ibrahim, I., Zainal, Z., Foo, C.Y., Huang, N.M., Jiang, Z.T.
• Format: Article
• Published: Elsevier 2023
• Online Access: http://psasir.upm.edu.my/id/eprint/107694/; https://linkinghub.elsevier.com/retrieve/pii/S0167577X23010236
• Institution: Universiti Putra Malaysia

In this study, we synthesized lithium manganese oxide nanoparticles/graphene nanoplatelets (LMO/GNPs) as the cathode material for a supercapabattery using a hydrothermal method. The addition of GNPs resulted in a 63 and 68 increase in specific capacitance and capacity compared to LMO alone, attributed to the enhanced conductivity and efficient lithium-ion diffusion of GNPs. The LMO/GNPs exhibited excellent rate capability and stability, with 80 capacity retention after 1000 cycles, an energy density of 39.07 Wh kgˆ’ 1 and a power density of 925.40 W kgˆ’ 11, showcasing their potential for supercapabattery applications. These findings highlight the superior performance of LMO/GNPs in the supercapabattery, making it a promising energy storage solution.