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Citation: TANG Zhi-Yuan, GENG Xin, WANG Zhan-Liang, XUN Jian-Jun. Preparation of Fe³⁺ Doped Manganese Dioxide for Electrode Material of Supercapacitor[J]. Chinese Journal of Applied Chemistry, ;2002, 19(10): 936-940. shu

Preparation of Fe³⁺ Doped Manganese Dioxide for Electrode Material of Supercapacitor

1.
School of Chemical Engineering, Tianjin University, Tianjin 300072

Corresponding author: TANG Zhi-Yuan,
Received Date: 8 January 2002
Available Online: 3 July 2002

MnO₂ and Fe³⁺ doped MnO₂ used as electrode materials were prepared by solid state reaction and characterized by XRD and SEM. The latter showed better electrochemical performances. The specific capacitances of pure MnO₂ and iron doped MnO₂ were 311~149 F/g and 318~114 F/g(mass of single electrode active matter), respectively, at current density of 50~1000 mA/g. The specific energy values of supercapacitors fabricated by these materials were 27.6~9.95 W·h/Kg and 28~10 W·h/Kg, respectively. It appeared that the ratio of Fe³⁺ in samples had greater effect on the electrochemical capacity. The better discharge capacity could be obtained when the mole ratio of Mn(Ⅳ) to Fe(Ⅲ) was 10. The capacitors consisted of modified MnO₂ was more stable in cycling than those made of MnO₂ and their specific capacitance after 1000 cycles decreased to 90% and 70%, respectively, at current density 1000 mA/g.
- manganese dioxide,
- supercapacitor,
- electrode material
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Preparation of Fe3+ Doped Manganese Dioxide for Electrode Material of Supercapacitor

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通讯作者: 陈斌, bchen63@163.com

Preparation of Fe³⁺ Doped Manganese Dioxide for Electrode Material of Supercapacitor