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To solve the incompatibility issue between electrodes and separators in cement-based structural supercapacitors (CSSC), a CSSC was fabricated by utilizing integrated cementitious electrodes and separators. The electrochemical enhancement mechanism was systematically explored. The results indicated that the CSSC showed an electric double-layer capacitance-dominated behavior. Its mass-specific capacitance was measured at 38.6 F g−1 when the current density was 0.1 mA cm−2, with power and energy densities of 9.77 W kg−1 and 10.26 Wh kg−1, respectively. After 400 cycles at a current density of 0.2 mA cm−2, a capacity retention rate of 96.65% and a Coulombic efficiency of 98.36% were maintained. The modified cement-based separator, which incorporated PAA/PVA, graphene oxide (GO), carbon nanotubes (CNTs), and H₂O₂, presented a bimodal pore structure that synergistically matched the electrode porosity. This research advanced the development of building-integrated energy storage systems.

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Fabrication and Electrochemical Performance of Cement-Based Structural Supercapacitors

  • 会议论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年

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  • Yumin Zhang,
  • Kewei Sun,
  • Zhicheng Yu,
  • Senlin Li,
  • Hao Yang

摘要

To solve the incompatibility issue between electrodes and separators in cement-based structural supercapacitors (CSSC), a CSSC was fabricated by utilizing integrated cementitious electrodes and separators. The electrochemical enhancement mechanism was systematically explored. The results indicated that the CSSC showed an electric double-layer capacitance-dominated behavior. Its mass-specific capacitance was measured at 38.6 F g−1 when the current density was 0.1 mA cm−2, with power and energy densities of 9.77 W kg−1 and 10.26 Wh kg−1, respectively. After 400 cycles at a current density of 0.2 mA cm−2, a capacity retention rate of 96.65% and a Coulombic efficiency of 98.36% were maintained. The modified cement-based separator, which incorporated PAA/PVA, graphene oxide (GO), carbon nanotubes (CNTs), and H₂O₂, presented a bimodal pore structure that synergistically matched the electrode porosity. This research advanced the development of building-integrated energy storage systems.