Few-layered CoHPO4·3H2O ultrathin nanosheets for high performance of electrode materials for supercapacitors

Abstract

Ultrathin cobalt phosphate (CoHPO₄·3H₂O) nanosheets are successfully synthesized by a one pot hydrothermal method. Novel CoHPO₄·3H₂O ultrathin nanosheets are assembled for constructing the electrodes of supercapacitors. Benefiting from the nanostructures, the as-prepared electrode shows a specific capacitance of 413 F g⁻¹, and no obvious decay even after 3000 charge–discharge cycles. Such a quasi-two-dimensional material is a new kind of supercapacitor electrode material with high performance.