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Probe-style biochar-cement-based batteries: Preparation, performance regulation, and application potential

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  • Chen, Yahang
  • Li, Mingqi
  • Mu, Ru
  • Qing, Longbang

Abstract

The utilization of cement-based batteries as energy storage devices is crucial for promoting sustainable development in the engineering and construction field. In this work, a new type of probe style biochar-cement-based battery (BCBB) is proposed for reducing carbon emissions. By incorporating porous biochar, the formation probability of connected pore networks in electrolyte is increased and the electrical tortuosity is reduced, which further optimizes the energy density of the battery. Through constant current discharge, electrochemical impedance spectroscopy, and compressive strength tests, the influence of biochar (BC) on electricity discharge, ionic conductivity, electrical tortuosity, and mechanical performances of BCBB is determined. Moreover, the pore structure is characterized by Mercury Intrusion Porosimetry, and the results show that the incorporation of BC enlarges the proportion of pores smaller than 20 nm, which provides more pathways for ion transport and improves the electricity discharge of cement-based batteries. Compared with cement-based batteries without BC, the BCBB containing 5 wt% KOH and 20 wt% BC basically achieves carbon neutrality, with its power density increased by 125%.

Suggested Citation

  • Chen, Yahang & Li, Mingqi & Mu, Ru & Qing, Longbang, 2026. "Probe-style biochar-cement-based batteries: Preparation, performance regulation, and application potential," Energy, Elsevier, vol. 353(C).
    • Handle: RePEc:eee:energy:v:353:y:2026:i:c:s0360544226010960
    DOI: 10.1016/j.energy.2026.140991
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