Preparation and Supercapacitive Properties of Fe2O3/Active Carbon Nanocomposites

高等学校化学研究 ›› 2012, Vol. 28 ›› Issue (5): 780-783 .

Preparation and Supercapacitive Properties of Fe₂O₃/Active Carbon Nanocomposites

LUO Pei-wen¹, YU Jian-guo¹, SHI Zhi-qiang¹, HUANG Hua¹, LIU Lang¹, ZHAO Yong-nan¹, LI Guo-dong², ZOU Yong-cun²

1. Institute of Nanostructured Materials & Tianjin Key Laboratory of Fiber Modification and Functional Fiber,School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300160, P. R. China;
2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry,Jilin University, Changchun 130012, P. R. China

收稿日期:2011-10-10 修回日期:2011-11-29 出版日期:2012-09-25 发布日期:2012-09-07
通讯作者: ZHAO Yong-nan E-mail:zhaoyn@263.net
基金资助:
Supported by the National Natural Science Foundation of China(No.21271138) and the Natural Science Foundation of Tianjin City, China(No.10JCZDJC21500).

Preparation and Supercapacitive Properties of Fe₂O₃/Active Carbon Nanocomposites

LUO Pei-wen¹, YU Jian-guo¹, SHI Zhi-qiang¹, HUANG Hua¹, LIU Lang¹, ZHAO Yong-nan¹, LI Guo-dong², ZOU Yong-cun²

1. Institute of Nanostructured Materials & Tianjin Key Laboratory of Fiber Modification and Functional Fiber,School of Materials Science and Engineering, Tianjin Polytechnic University, Tianjin 300160, P. R. China;
2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry,Jilin University, Changchun 130012, P. R. China

Received:2011-10-10 Revised:2011-11-29 Online:2012-09-25 Published:2012-09-07
Supported by:
Supported by the National Natural Science Foundation of China(No.21271138) and the Natural Science Foundation of Tianjin City, China(No.10JCZDJC21500).

摘要/Abstract

摘要： Fe₂O₃/active carbon(Fe₂O₃/AC) nanocomposites were readily fabricated by pyrolyzing Fe³⁺ impregnated active carbon in a nitrogen atmosphere. The as-prepared composites were studied by X-ray powder diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM). The capacitive property of the composites was investigated by cyclic voltammetry(CV) and galvanostatic charge-discharge test. Physical characterizations show that the γ-Fe₂O₃ fine grains dispersed in the AC well, with a mean size of 21.24 nm. Electrochemical tests in 6 mol/L KOH solutions indicate that the as-prepared nanocomposites exhibited improved capacitive properties. The specific capacitance(SC) of Fe₂O₃/AC nanocomposites was up to 188.4 F/g that was derived from both electrochemical double-layer capacitance and pseudo-capacitance, which was 78% larger than that of pristine AC. A symmetric capacitor with Fe₂O₃/AC nanocomposites as electrode showed an excellent cycling stability. The SC was only reduced by a factor of 9.2% after 2000 cycles at a current density of 1 A/g.

关键词: Nanocomposite, Fe₂O₃, Active carbon, Supercapacitor

Abstract: Fe₂O₃/active carbon(Fe₂O₃/AC) nanocomposites were readily fabricated by pyrolyzing Fe³⁺ impregnated active carbon in a nitrogen atmosphere. The as-prepared composites were studied by X-ray powder diffraction(XRD), X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM). The capacitive property of the composites was investigated by cyclic voltammetry(CV) and galvanostatic charge-discharge test. Physical characterizations show that the γ-Fe₂O₃ fine grains dispersed in the AC well, with a mean size of 21.24 nm. Electrochemical tests in 6 mol/L KOH solutions indicate that the as-prepared nanocomposites exhibited improved capacitive properties. The specific capacitance(SC) of Fe₂O₃/AC nanocomposites was up to 188.4 F/g that was derived from both electrochemical double-layer capacitance and pseudo-capacitance, which was 78% larger than that of pristine AC. A symmetric capacitor with Fe₂O₃/AC nanocomposites as electrode showed an excellent cycling stability. The SC was only reduced by a factor of 9.2% after 2000 cycles at a current density of 1 A/g.

Key words: Nanocomposite, Fe₂O₃, Active carbon, Supercapacitor

LUO Pei-wen, YU Jian-guo, SHI Zhi-qiang, HUANG Hua, LIU Lang, ZHAO Yong-nan, LI Guo-dong, ZOU Yong-cun. Preparation and Supercapacitive Properties of Fe₂O₃/Active Carbon Nanocomposites[J]. 高等学校化学研究, 2012, 28(5): 780-783 .

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Preparation and Supercapacitive Properties of Fe₂O₃/Active Carbon Nanocomposites

Preparation and Supercapacitive Properties of Fe₂O₃/Active Carbon Nanocomposites

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