One-Dimensional Assembly of Conductive and Capacitive Metal Oxide Electrodes for High-Performance Asymmetric Supercapacitors

Midhun Harilal, Baiju Vidyadharan, Izan Izwan Misnon, Gopinathan M. Anilkumar, Adrian Lowe, Jamil Ismail, Mashitah M. Yusoff, Rajan Jose

Electrospinning is used to create a one-dimensional morphology made up of nanograins of two metal oxides, one with high electrical conductivity (CuO) and the other with higher charge storability (CuO/CuO) (Co3O4). When utilised as an asymmetric supercapacitors electrode, the CuO–Co3O4 nanocomposite nanowires exhibit particular capacitance, high rate capability, and good cycling stability compared to single-component nanowire equivalents. Practical symmetric (SSCs) and asymmetric supercapacitors are built and compared utilising commercially activated carbon, CuO, Co3O4, and CuO–Co3O4 compound nanowires. CuO–Co3O4 ASCs using aqueous alkaline electrolytes attain a high energy density of 44 Wh kg–1 at a power density of 14 kW kg–1, allowing them to store high energy faster. To improve the performance of electrical and electrochemical devices, we can use the hybrid nanowire technique.

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