Citation: ZHANG Zi-Yu, HU Zhong-Ai, YANG Yu-Ying, WANG Huan-Wen, CHANG Yan-Qin, CHEN Yan-Li, LEI Zi-Qiang. Ce-Doped Mn₃O₄ and Its Electrochemical Capacitive Behavior[J]. Acta Physico-Chimica Sinica, ;2011, 27(07): 1673-1678. doi: 10.3866/PKU.WHXB20110709 shu

Ce-Doped Mn₃O₄ and Its Electrochemical Capacitive Behavior

1.
Key Laboratory of Polymer Materials of Gansu Province, Key Laboratory of Eco-Environment-Related Polymer Materials of Ministry of Education, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China

Received Date: 14 January 2011
Available Online: 19 May 2011
Fund Project: 国家自然科学基金(20963009) (20963009) 甘肃省自然科学基金(0803RJ2A005) (0803RJ2A005)

Mn₃O₄ and Ce doped Mn₃O₄ were synthesized via a sol-gel route using metal nitrates as raw materials and citric acid as the chelating agent. The gel precursors were calcined at 300 ℃ for 12 h in a muffle furnace. Their morphology and structure were characterized using powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). Their electrochemical performance as a supercapacitor electrode material was investigated comparatively by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge-discharge. The experimental results indicated that Ce- doping did not change the structure of Mn₃O₄ but greatly affected the morphology and considerably enhanced the electrochemical performance of Mn₃O₄. A specific capacitance of 477 F·g^-1 was obtained when the mole ratio of Ce ion to total metal ions was 3%, which was 43.7% higher than that of the undoped material. Moreover, Ce-doping significantly improved the capacitance retention ability.
- Sol-gel,
- Mn₃O₄,
- Ce,
- Dope,
- Electrochemical capacitance
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Ce-Doped Mn₃O₄ and Its Electrochemical Capacitive Behavior