A rechargeable cement-based battery was developed, with an average energy density of 7 Wh/m 2 (or 0.8 Wh/L) during six charge/discharge cycles. Iron (Fe) and zinc (Zn) were selected as anodes, and nickel-based (Ni) oxides as cathodes. The conductivity of cement-based electrolytes was modified by adding short carbon fibers (CF). The cement-based electrodes were produced by two methods: powder-mixing and metal-coating. Different combinations of cells were tested. The results showed that the best performance of the rechargeable battery was the Ni–Fe battery, produced by the metal-coating method. View Full-Text Figure 1 This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited Zhang, E.Q.; Tang, L. Rechargeable Concrete Battery. Buildings 2021 , 11 , 103. https://doi.org/10.3390/buildings11030103 Article Access Statistics For more information on the journal statistics, click here .