High-Performance Electrode Materials for Electrochemical Energy Storage Devices Based on Microrod-Like Structures of Calcium Phosphate (Ca₂P₂O₇)

Herein, the hydrothermal method is used to synthesize microrod-like morphology of calcium phosphate (Ca2P2O7). The prepared electrode manifests a high specific capacitance of 1174.5 Fg(-1) and a specific capacity of 807.5 Cg(-1) at a scan rate of 5 mV s(-1). Finally, the potential supercapacitor electrode material shows a maximum power density of 1855.7 W kg(-1) and an energy density of 55.23 Wh kg(-1) at the current densities of 5 and 0.5 Ag-1, respectively with the three-electrode system. While, the two-electrode system exhibits a maximum power density of 1330.9 W kg(-1) and an energy density of 11.7 Wh kg(-1) at the current densities of 5 and 1 Ag-1, respectively. The electrode exhibits higher lifetime capacitance retention of 88.74% after 5000 cycles. The b value lies within the range of 0.68-1, which is suitable for both batteries and supercapacitors for transport application.