Perovskite La<sub>1−<i>x</i></sub>K<sub><i>x</i></sub>CoO<sub>3−<i>δ</i></sub> (0 ≤ <i>x</i> ≤ 0.5): a novel bifunctional OER/ORR electrocatalyst and supercapacitive charge storage electrode in a neutral Na<sub>2</sub>SO<sub>4</sub> electrolyte
Rakesh Mondal, Neeraj Kumar Mishra, Mahatim Singh, Asha Gupta, Preetam Singh
Abstract
La 1− x K x CoO 3− δ (0 ≤ x ≤ 0.5) display a remarkable pseudocapacitive charge storage capacitance in a neutral 0.5 M Na 2 SO 4 electrolyte and superior electrocatalytic activities for the OER and ORR in a 1 M KOH electrolyte.
Topics & Concepts
ElectrolyteOverpotentialGravimetric analysisCapacitanceAnalytical Chemistry (journal)Faraday efficiencyElectrocatalystOxygen evolutionChemistryCurrent densityMaterials scienceElectrodeElectrochemistryInorganic chemistryPhysical chemistryPhysicsChromatographyQuantum mechanicsOrganic chemistrySupercapacitor Materials and FabricationElectrocatalysts for Energy ConversionAdvanced battery technologies research