Nickel oxide (NiO) nanoparticles loaded on porous strontium-substituted lanthanum cobaltite (La 0·7 Sr 0·3 CoO 3-δ , LSC) ceramic substrate is fabricated as a novel binder-free electrode (NiO/LSC) for electrochemical capacitors. The LSC substrate is synthesized through a simple solid-state method. NiO nanoparticles are loaded onto the porous LSC substrate by infiltrating a nickel nitrate (Ni(NO 3 ) 2 ) solution into the pores, followed by calcination. The composite electrode NiO/LSC with a high mass loading of NiO (∼10 mg cm −2 ) exhibits an appreciable areal capacitance of 10.6 F cm −2 , a specific capacitance of 1064.1 F g −1 and remarkable cycling stability (80.1% retention after 3000 cycles at 20 mA cm −2 ). Moreover, an asymmetric electrochemical capacitor, with NiO/LSC as the positive electrode and carbon cloth as the negative electrode, confirms the excellent capacitive properties, with high energy density of 9.27 mWh cm −3 under a wide potential of 1.65 V. This work indicates the promising application of NiO/LSC as an advanced electrode for electrochemical capacitors.
- Electrochemical capacitors
- La Sr CoO substrate
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology