Inorganic Chemicals Industry >

2022 , Vol. 54 >Issue 3: 59 - 65

DOI: https://doi.org/10.19964/j.issn.1006-4990.2021-0352

Research & Development

Study on high-performance supercapacitors based on Fe2O3/biomass carbon composites

  • Dian WANG ,
  • Qiong SU ,
  • Shaofeng PANG ,
  • Shijun CAO ,
  • Lihui KANG ,
  • Lichun LIANG ,
  • Yanbin WANG ,
  • Zhaoxia LI
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  • 1. School of Chemical Engineering,Northwest Minzu University,Lanzhou 730030,China
    2. Key Laboratory of EnvironmentFriendly Composite Materials of the State Ethnic Affairs Comm-ission
    3. Key Laboratory of Utility of Environmental Friendly Composite Materials and Biomass in Universities of Gansu Province
    4. Engineering Research Center of Biomass-Functional Composite Materials of Gansu Province

Received date: 2021-05-31

  Online published: 2022-03-18

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Abstract

To improve the low specific capacitance of carbon materials as well as the poor electrical conductivity and low cyclic stability of ferric oxide（Fe2O3）,Fe2O3 was used to modify the surface of biomass-derived carbon to prepare Fe2O3/bio-mass carbon composites,which achieved higher specific capacitance and better stability by the synergistic effect of Fe2O3 and biomass-derived carbon.The samples were characterized by scanning electron microscopy（SEM）、X-ray photoelectron spec-troscopy（XPS） and Raman spectra.The results demonstrated that the prepared composites had a certain pore struc-ture,with Fe2O3 nanoparticles anchored on the carbon surface.When the mass ratio of Fe2O3 and biomass-derived carbon was 1:1,the prepared composites possessed the best electrochemical performance,showing a high specific capacitance of 430.8 F/g（1.0 A/g） in 3.0 mol/L KOH.The capacitance retention was still greater than 60% when the current density was increased by 20 times.The asymmetric supercapacitor constructed by using it as the negative electrode had a high voltage window（0~1.6 V） and achieved a high energy density of 39.1 W·h/kg.While,it also exhibited excellent cycling stability with 111% capacitance retention after 5 000 cycles at 10 A/g.

Key words： biomass; Fe2O3; composite materials; specific capacitance; supercapacitor

Cite this article

Dian WANG , Qiong SU , Shaofeng PANG , Shijun CAO , Lihui KANG , Lichun LIANG , Yanbin WANG , Zhaoxia LI . Study on high-performance supercapacitors based on Fe2O3/biomass carbon composites[J]. Inorganic Chemicals Industry, 2022 , 54(3) : 59 -65 . DOI: 10.19964/j.issn.1006-4990.2021-0352

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