Simple synthesis of novel phosphate electrode materials with unique microstructure and enhanced supercapacitive properties

• 来源期刊: 能源化学
• 年，卷（期）: 2016,（4）
• 页码范围: 601-608
• 页数: 8页
• 语种: 英文

摘要

Flower-like Ni3P2O8 and flower-like Fe3P2O8.8H2O have been successfully synthesized by a simple chemical precipitation method.X-ray diffraction (XRD) patterns reveal an amorphous phase formation of nickel phosphate (Ni3P2O8) and pure monoclinic phase of Fe3PzO8·8H2O.The novel flower-like Ni3P2O8 and flower-like Fe3P2O8.8H2O when used for supercapacitor electrode materials exhibit a high specific capacitance (Cm) of 1464 F/g and 200 F/g at a current density of 0.5 A/g,respectively.Eventually,an asymmetric supercapacitor is fabricated using Ni3P2O8 as positive electrode and Fe3P2O8.8H2O as negative electrode.A high specific capacitance of 94 F/g is achieved in the high-voltage region of 0 ～1.6V,and a large energy density of 32.6 Wh/kg is delivered at power density of 420 W/kg.The findings demonstrate the important and great potential of developing metal phosphate based materials for supercapacitors.