Supercapacitor electrode material derived from copper hydrogen phosphate nano pellets

Herein, the authors disclose for the first time the synthesis of copper hydrogen phosphate (Cu(HPO4)) material for supercapacitor applications. First, we synthesized Cu(HPO4) by a facile chemical bath deposition (CBD) method and then it was characterized by several physicochemical techniques. The fabricated Cu(HPO4) electrode showed superior capacitive performance of 874F/g at 0.1 A/g of current density. Further, Cu(HPO4) electrode retains a maximum of 93.2% of its original specific capacitance retention over 5,000 galvanostatic charge–discharge (GCD) cycles.