SEMICONDUCTOR MATERIALS

RuO2/MnO2 composite materials for high-performance supercapacitor electrodes

Jianming Lei and Xiaomei Chen

+ Author Affiliations

 Corresponding author: Xiaomei Chen, Email: mei1008@163.com

PDF

Abstract: Ruthenium oxide and manganese oxide nanomaterials were respectively prepared by a sol-gel process and hydrothermal synthesis method. The morphologies and microstructures of the composite nanomaterials were characterized by SEM and XRD. Based on the cyclic voltammetry, electrochemical impedance spectroscopy and constant current charge-discharge techniques, the performances of the electrodes were investigated. The results show that the composite of manganese oxide and ruthenium oxide is beneficial to improve the impedance characteristic. The electrode with 60% (mass ratio) manganese oxide has a high specific capacitance of 438 F/g and a lower inner resistance of 0.304 Ω using 38% (mass ration) H2SO4 solution. The capacitance retention of RuO2/MnO2 composite electrode was 92.5% after 300 cycles.

Key words: supercapacitorruthenium oxidemanganese oxidespecific capacitance



[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
Fig. 1.  (a) An SEM image of ruthenium oxide nanoparticles. (b) An SEM image of manganese oxide nanorod.

Fig. 2.  (a) XRD of manganese oxide nanorods. (b) XRD of ruthenium oxide nanoparticles.

Fig. 3.  (a) I-V curves in the scan rate of 20 mV/s with different mass ratio. (b) A I-V curve of the single manganese oxide electrode in the scan rate of 20 mV/s.

Fig. 4.  (a) Plot of scan rate versus specific capacitance. (b) Plot of cycling studies at 20 mV/s.

Fig. 5.  The constant current charging-discharging curves of RuO2 ruthenium oxide/MnO2 manganese oxide composite electrode under different ratios.

Fig. 6.  Nyquist of the composite electrode with 60% of MnO2.

Table 1.   The ESR of the composite electrode under different ratios.

DownLoad: CSV
[1]
[2]
[3]
[4]
[5]
[6]
[7]
[8]
[9]
[10]
[11]
[12]
[13]
[14]
[15]
  • Search

    Advanced Search >>

    GET CITATION

    shu

    Export: BibTex EndNote

    Article Metrics

    Article views: 2817 Times PDF downloads: 36 Times Cited by: 0 Times

    History

    Received: 21 January 2015 Revised: Online: Published: 01 August 2015

    Catalog

      Email This Article

      User name:
      Email:*请输入正确邮箱
      Code:*验证码错误
      Jianming Lei, Xiaomei Chen. RuO2/MnO2 composite materials for high-performance supercapacitor electrodes[J]. Journal of Semiconductors, 2015, 36(8): 083006. doi: 10.1088/1674-4926/36/8/083006 J M Lei, X M Chen. RuO2/MnO2 composite materials for high-performance supercapacitor electrodes[J]. J. Semicond., 2015, 36(8): 083006. doi: 10.1088/1674-4926/36/8/083006.Export: BibTex EndNote
      Citation:
      Jianming Lei, Xiaomei Chen. RuO2/MnO2 composite materials for high-performance supercapacitor electrodes[J]. Journal of Semiconductors, 2015, 36(8): 083006. doi: 10.1088/1674-4926/36/8/083006

      J M Lei, X M Chen. RuO2/MnO2 composite materials for high-performance supercapacitor electrodes[J]. J. Semicond., 2015, 36(8): 083006. doi: 10.1088/1674-4926/36/8/083006.
      Export: BibTex EndNote

      RuO2/MnO2 composite materials for high-performance supercapacitor electrodes

      doi: 10.1088/1674-4926/36/8/083006
      More Information
      • Corresponding author: Email: mei1008@163.com
      • Received Date: 2015-01-21
      • Accepted Date: 2015-03-11
      • Published Date: 2015-01-25

      Catalog

        /

        DownLoad:  Full-Size Img  PowerPoint
        Return
        Return