Facile synthesis of Co3P2O8 • 8H2O for high-performance electrochemical energy storage

Co3P2O8 center dot 8H(2)O particles are successfully synthesized as a high performance electrode material of supercapacitor via a facile chemical precipitation method. The prepared Co3P2O8 center dot 8H(2)O exhibits outstanding capacitive properties. A specific capacitance of 446.25 F g(-1) is obtained at a current density of 0.5 A g(-1) and 100% of the specific capacitance is retained after 1000 cycles. An asymmetric supercapacitor using Co3P2O8 center dot 8H(2)O as the positive electrode and activated carbon (AC) as the negative electrode yielded an energy density of 11.9 Wh kg(-1) and a maximum power density of 3.59 kW kg(-1). Moreover, it delivers a good rate capability and long-term stability. These excellent electrochemistry performances indicate that this novel material is promising for potential application in supercapacitors. (C) 2015 Elsevier B.V. All rights reserved.