What is the energy density of a cement-based battery?

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).

Can cement-based batteries be built on a large scale?

Although the energy density of 0.8 Wh/L was markedly lower than the commercial batteries, there is a great opportunity to build rechargeable cement-based batteries on a large scale, with regard to the huge volume of a building.

Could this dark lump of concrete represent the future of energy storage?

This innocuous, dark lump of concrete could represent the future of energy storage. The promise of most renewable energy sources is that of endless clean power, bestowed on us by the Sun, wind and sea. Yet the Sun isn't always shining, the wind isn't always blowing, and still waters do not, in megawatt terms, run deep.

What is the best rechargeable battery based on cement-based electrodes?

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. 1. Introduction

What is the performance of concrete battery under 6 charge and discharge cycles?

Figure 12 presents the performance of the concrete battery under six charge and discharge cycles. The average battery output of the six cycles was 60 mAh. The detailed data are listed in Table 13. A detailed discharge profile of cycle one is given in Figure 13.

What is a Ni Fe concrete battery?

Ni–Fe Concrete Battery A single-cell cement-based battery was build based on the best combination we gained in this work, which was an Ni–CF cathode and Fe–CF anode in conductive cementitious mortar.