Enhanced electrochemical performance of 3‐D microporous nickel/nickel oxide nanoflakes for application in supercapacitors

Increasing energy demands, depletion of fossil fuels, and environmental issues have impelled society to choose the pathways renewable clean energy, which motivated scientists engineers develop sustainable, renewable, resources. However, major challenge is implementation low-cost, flexible approaches materials fulfill requirements storage conversion technologies, specifically those involving batteries supercapacitors. In this context, herein, we demonstrate an integrated approach realize three-dimensional (3-D) mesoporous nickel(Ni)/nickel oxide (NiO) nanostructures with enhanced performance for supercapacitor applications. Conformal deposition NiO nanoflakes on 3-D Ni onto inexpensive Cu substrates large active surface area, providing easy ion accessibility through channels improving electron transport interconnected nickel network. The Ni/NiO exhibit excellent electrochemical performance, namely, areal capacitance 720 mFcm−2, density 4 μWhcm−2 power 2.5 mWcm−2 a reasonable capacity retention 5000 cycles. We believe that these results may provide roadmap further tune conditions so as engineer architectures derive devices practical