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涂覆載量對IrO2-CeO2-G/Ti電極組織結(jié)構(gòu)和電容性能的影響
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福州大學(xué) 材料科學(xué)與工程學(xué)院

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the National Natural Science Foundation of China (21875038)


Effect of IrO2 Content on Microstructure and Capacitance of IrO2-CeO2-G/Ti Electrode
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1.College of Materials Science and Engineering,Fuzhou University,Fuzhou,350108;2.China

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The National Natural Science Foundation of China (21875038)

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    摘要:

    采用熱分解法制備了新型IrO2-CeO2-G/Ti復(fù)合電極。采用SEM、TEM、XRD和XPS等測試手段分別對不同IrO2含量的電極進(jìn)行表征。采用循環(huán)伏安法、恒流充放電法和電化學(xué)阻抗譜法對電極的電化學(xué)行為進(jìn)行研究。結(jié)果表明,IrO2涂覆載量為2.5mg/cm2 的電極具有最大的比電容值459.5 F/g。在5mA/cm2電流密度下,經(jīng)5000次充放電循環(huán)后IrO2涂覆載量為2.5mg/cm2電極比電容仍能保持97.8%。該種復(fù)合電極材料因其獨(dú)特的元素組成和良好的贗電容性能,是一種理想的超級電容器電極材料。

    Abstract:

    The novel IrO2-CeO2-G/Ti composite electrodes were prepared by thermal decomposition method. The synthesized electrodes with different IrO2 content had been characterized by scanning electron microscope(SEM), transmission electron microscope(TEM), X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS). The electrochemical performances of the electrodes were investigated by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy in 0.5 M H2SO4 solution. The results showed that the electrode with 2.5mg/cm2 IrO2 exhibited an excellent specific capacitance value of 459.5 F/g, and the specific capacitance maintained about 97.8% after 5000 charge-discharge cycles at a 5mA/cm2 current density. The electrode with 2.5mg/cm2 IrO2 was an ideal electrode for supercapacitor due to?its unique composition proportion and the excellent pseudocapacitance property.

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引用本文

黃善鋒,馮珂珂,王艷鴻,張 帥,邵艷群,陳孔發(fā),唐 電.涂覆載量對IrO2-CeO2-G/Ti電極組織結(jié)構(gòu)和電容性能的影響[J].稀有金屬材料與工程,2020,49(5):1533~1538.[Shanfeng HUANG, Keke FENG, Yanhong WANG, Shuai ZHANG, Yanqun SHAO, Kongfa CHEN, Dian TANG. Effect of IrO2 Content on Microstructure and Capacitance of IrO2-CeO2-G/Ti Electrode[J]. Rare Metal Materials and Engineering,2020,49(5):1533~1538.]
DOI:10.12442/j. issn.1002-185X.20181261

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  • 收稿日期:2018-12-18
  • 最后修改日期:2019-01-03
  • 錄用日期:2019-01-09
  • 在線發(fā)布日期: 2020-06-05
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