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<p>As traditional energy sources continue to deplete, the development of electrodes aimed at improving energy storage has become a promising approach to mitigate the energy crisis. Additionally, the cement-based electrode possesses advantages such as low cost and easy fabrication, which contribute to its promising potential for applications in batteries, capacitors, and especially supercapacitors. However, cement-based electrode also has the disadvantages of large resistance and unclear equivalent circuit, which limit&#xa0;its practical use. Here&#xa0;two types of cement-based carbon-doped electrodes were prepared by blending conductive activated carbon with ordinary cement. In one approach, gold was deposited onto the electrode surface (SE), while in the other, polytetrafluoroethylene (PTFE) was used to adhere the electrode to aluminum foil (PE). The electrode treated with PTFE-coated aluminum foil shows a lower specific capacitance of 1.13 F/g at 5&#xa0;mA/cm<sup>2</sup> and a higher resistance (15.7 Ω). However, it is surprising that the surface gold-sprayed electrode displays&#xa0;superior electrochemical performance, exhibiting a specific capacitance of 1.51 F/g at 5&#xa0;mA/cm<sup>2</sup> and a low resistance (6.4 Ω). More importantly, the electrochemical process of SE is predominantly governed by surface-controlled processes. This result provides an ideal host for the practical application of cement-based carbon-doped electrodes.</p> Graphical abstract <p></p>

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Surface-modified carbon-doped cementitious electrodes for energy storage systems: fabrication and pseudocapacitive performance

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Yuhao Shen,
  • Guangyuan Zhao,
  • Ting Deng,
  • Huangyi Deng,
  • Limei Zhang,
  • Chuanbei Liu,
  • Jianwu Wen,
  • Gaoyin Zhang,
  • Lihua Zhang,
  • Haifeng Liu,
  • Laibao Liu

摘要

As traditional energy sources continue to deplete, the development of electrodes aimed at improving energy storage has become a promising approach to mitigate the energy crisis. Additionally, the cement-based electrode possesses advantages such as low cost and easy fabrication, which contribute to its promising potential for applications in batteries, capacitors, and especially supercapacitors. However, cement-based electrode also has the disadvantages of large resistance and unclear equivalent circuit, which limit its practical use. Here two types of cement-based carbon-doped electrodes were prepared by blending conductive activated carbon with ordinary cement. In one approach, gold was deposited onto the electrode surface (SE), while in the other, polytetrafluoroethylene (PTFE) was used to adhere the electrode to aluminum foil (PE). The electrode treated with PTFE-coated aluminum foil shows a lower specific capacitance of 1.13 F/g at 5 mA/cm2 and a higher resistance (15.7 Ω). However, it is surprising that the surface gold-sprayed electrode displays superior electrochemical performance, exhibiting a specific capacitance of 1.51 F/g at 5 mA/cm2 and a low resistance (6.4 Ω). More importantly, the electrochemical process of SE is predominantly governed by surface-controlled processes. This result provides an ideal host for the practical application of cement-based carbon-doped electrodes.

Graphical abstract