Scientists set out to turn concrete structures in batteries – walls of buildings and structural elements. Success accompanied by researchers from Sweden, which offered and experienced in the laboratory the world’s first battery concept based on cement. In the future, this will help store electricity in the walls of buildings and feed numerous tracking sensors for structures and not only. For renewable energy, this will also come in handy.
Cement is not first viewed as material for creating batteries. For example, cement manufacturers from Japan study the possibility of its use in cathode materials and anodes of batteries. Scientists from the University of Technological University of Chalmers went further – they proposed to use cement (concrete) as an electrical energy drive.
To fill the electrodes, a mixture based on cement is offered a conductive composition based on carbon fibers in a ratio of 0.5% of the volume. First, the cathode layer on the basis of the carbon mesh with a nickel coating is poured, then a layer for impregnation with electrolyte and, finally, an anode layer on a carbon mesh coated with iron is created.
The capacity of the created experimental battery pack was modest 7 W · h / m2 or 0.8 W · b / l. It is three orders of magnitude less than modern commercial lithium batteries. But the huge volumes of building structures with interest will cover this flaw. However, while the cement-based battery was tested only six cycles of charge and discharge, and in the form of walls and structures he will have to work for decades.
Scientists recognize that the battery based on cement for construction requires significant improvements both by itself and from the point of view of new approaches to architectural design. For example, you can envisage the replacement sections of buildings to replace the spent battery section. But these are all solved questions. Scientists have made their offer, we expect the reaction of builders and architects.