Journal of Inorganic Materials ›› 2020, Vol. 35 ›› Issue (10): 1137-1141.DOI: 10.15541/jim20200015

Special Issue: 能源材料论文精选(二):超级电容器与储能电池(2020)

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Preparation and Pseudocapacitive Properties of Phosphate Ion-doped MnFe2O4

FEI Mingjie1(),ZHANG Renping2,ZHU Guisheng1,YU Zhaozhe1,YAN Dongliang1()   

  1. 1. Guangxi Key Laboratory of Information Materials, Guilin University of Electronic Technology, Guilin 541004, China
    2. School of Materials Science and Engineering, Jingdezhen Ceramic Institute, Jingdezhen 333403, China
  • Received:2020-01-09 Revised:2020-02-26 Published:2020-10-20 Online:2020-03-05
  • About author:FEI Mingjie(1995-), female, Master candidate. E-mail: mjfyjs@163.com
  • Supported by:
    National Natural Science Foundation of China(51974098);National Natural Science Foundation of China(51564006);National Natural Science Foundation of China(51764011);National Natural Science Foundation of China(21805055);Natural Science Foundation of Guangxi(2017GXNSFDA198021);Natural Science Foundation of Guangxi(AA17204063);Natural Science Foundation of Guangxi(AD19110077)

Abstract:

In order to improve the electrochemical performance, the phosphate ion doped MnFe2O4 (PMFO) was synthesized by a hydrothermal method combined with a subsequent phosphatization treatment. Both the specific surface area and electrical conductivity of electrode material are improved by the phosphate ion functionalization. Furthermore, the specific capacitance is 750 F/g at 1 A/g for PMFO, which is almost 1.7% higher than that of MFO. Besides, the cyclic stability of PMFO electrode is also improved. The asymmetric supercapacitors (ASCs) assembled by positive electrode PMFO and actived negative electrode carbon (AC) display an ultrahigh energy density of 168.8 Wh/kg at a power density of 2.7 kW/kg. The PMFO is demonstrated as a promising electrode material for supercapacitor applications.

Key words: MnFe2O4, phosphate ion, doping, supercapacitor

CLC Number: