You may have heard of batteries storing current, but homes of the future will also be able to store electricity within themselves. Researchers working to make cities carbon-free have discovered a remarkable method. Researchers at China’s Harbin Institute of Technology have developed a cement-based supercapacitor that, while not only strong, can also store electricity within itself.
This cement’s unique feature is that it is 3D-printable. If this technology is used on a large scale, it could reduce dependence on batteries and allow buildings to store electricity within themselves.
It’s well known that electricity can be generated from solar panels or windmills, but storing it requires expensive battery backups. As a solution, researchers have developed supercapacitors, which can store and release energy very quickly, rather than using slow chemical reactions.
According to the report, this technology can be installed in the foundations, walls, or staircases of buildings. This will allow the building to store excess electricity generated during the day and supply it as needed.
Before this breakthrough technology emerged, existing technologies lacked the advantage that cement-based devices were fragile and their ions moved very slowly, meaning they took a long time to store electricity or release it for use.
To overcome this problem, researchers created a highly conductive printable ink by mixing nanotubes, carbon black, and cement. Using a 3D printer, this mixture was molded into an interlocking structure on a concrete slab.
This technology does not affect the strength of the cement. Testing has shown that the energy-storing slab can withstand a pressure of 23.00 MPa, equivalent to the strength of regular cement.
In testing, researchers attached the 3D-printed device to a cement slab, which instantly lit up LED lights without any wiring. This technology can easily power emergency lights and security sensors during power outages.
This concrete supercapacitor has passed initial testing, but its major drawback is that its performance declines in extreme cold, even at -18°C. This is because the movement of ions, or the flow of current, slows down in cold weather.
Researchers are currently exploring ways to address this challenge. However, this technology could prove extremely useful in places with moderate temperatures.
In the future, we may see homes and buildings that generate electricity from solar or wind turbines during the day, store it within themselves, and use it for various purposes at night.