Citation: HU Ying-Ying, HU Zhong-Ai, ZHANG Ya-Jun, LU Ai-Lian, XU Huan, ZHANG Zi-Yu, YANG Yu-Ying, LI Li, WU Hong-Ying. Synthesis and Electrochemical Characterization of RuO₂·xH₂O/Graphite Nanosheet Composite Array Electrodes for Supercapacitors[J]. Acta Physico-Chimica Sinica, ;2013, 29(02): 305-310. doi: 10.3866/PKU.WHXB201211201 shu

Synthesis and Electrochemical Characterization of RuO₂·xH₂O/Graphite Nanosheet Composite Array Electrodes for Supercapacitors

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: 7 September 2012
Available Online: 20 November 2012

We used electrochemical exfoliation to construct graphite nanosheet (GNS) arrays, in which the varying number of nanosheet layers were parallel to each other and perpendicular to the carbon substrate. Hydrous ruthenium oxide (RuO₂·xH₂O) was then loaded directly on the surface of nanosheets using cathodic reduction electrodeposition, resulting in the formation of RuO₂·xH₂O/GNS composite array electrodes. Electrochemical measurements showed that the composite array electrodes exhibited excellent capacitive behaviors, and achieved specific capacitance values as high as 4226 F·m^-2 in the potential window up to 0.9 V, with a scan rate of 5 mV·s^-1 in 0.5 mol·L^-1 H₂SO₄ solution. The RuO₂·xH₂O/GNS composite array electrodes showed od cycling abilities, and maintained 94.18% of their maximum performance after 20000 cycles.
- Supercapacitor,
- Graphite nanosheet,
- RuO₂,
- Electrodeposition,
- Array electrode
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沈阳化工大学材料科学与工程学院沈阳 110142

Synthesis and Electrochemical Characterization of RuO2·xH2O/Graphite Nanosheet Composite Array Electrodes for Supercapacitors

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Synthesis and Electrochemical Characterization of RuO₂·xH₂O/Graphite Nanosheet Composite Array Electrodes for Supercapacitors