Cement is arguably the most widely utilized construction product in the world. With a little tinkering, it may also help power our homes. On a laboratory workstation in Cambridge, Massachusetts, a collection of polished black-colored concrete cylinders lies in liquid and is entangled with cables. They don’t appear to be accomplishing much from the outside. But eventually, Damian Stefaniuk flips a switch. The human-made rock blocks, connected to an LED, and the bulb lights up.

Need for Energy Storage Solutions:

Most renewable energy resources promise an unending supply of clean power from the sun, wind, and sea. However, the sun doesn’t always shine, the wind doesn’t always blow, and calm waters don’t run deep in megawatt terms. These are inconsistent energy sources, which provide a challenge in our power-hungry modern world.

That means we need to store the energy in batteries. However, batteries rely on elements like lithium, which is in significantly shorter quantity than is likely to essential to meet the demand by the world’s efforts to reduce carbon emissions from its energy and transportation networks. A total of 101 lithium mines in the globe, and financial experts are skeptical about their ability to meet rising global demand. Researchers in the field point out that lithium mining consumes a significant amount of water and energy, which reduces the environmental advantages of switching to sources of renewable energy in the first place. The procedures used to harvest lithium can potentially result in harmful compounds spilling into local water systems.

Evolution of Carbon-Cement Supercapacitors:

This is where Stefaniuk’s concrete comes in. He and other researchers at the Massachusetts Institute of Technology (MIT) discovered a technique to make a device for storing energy known as a supercapacitor out of three simple, inexpensive materials: water, cement, and a soot-like substance known as carbon black.

Supercapacitors are very efficient energy storage devices, but they are distinct from batteries in several fundamental respects. They charge significantly faster than a lithium-ion battery and spared from the same amount of performance deterioration. However, supercapacitors rapidly release the electricity they store, making them less helpful in equipment such as cell phones, laptops, and electric vehicles that require a consistent source of energy over time.

However, Stefaniuk believes that carbon-cement supercapacitors could contribute significantly to efforts to decarbonize the world economy. “If it can be ramped up, the technology may assist in solving a significant problem, the storage of renewable energy,” according to him.

Potential Usage:

He and his colleagues at MIT as well as Harvard University’s Wyss Institute for Biologically Influenced Engineering envision various uses for their supercapacitors.

One solution could be to build roadways that collect solar power and then unleash it to recharge electric vehicles as they drive wirelessly. The carbon-cement supercapacitor’s rapid release of energy would allow automobiles to charge their batteries quickly. Another conceivable use is as energy-storing groundwork for homes. “To have walls, or bases, or pillars, that are dynamic not only to reinforce a structure additionally in that power is stored within them,” states Stefaniuk.

Early Phase of Development:

For the time currently, the concrete supercapacitor can store slightly less than 300 watts per cubic meter, which is sufficient to power a 10-watt of power LED lightbulb for 30 hours. The amount of electricity produced “may seem low relative to traditional batteries, [but] a base with 30-40 cubic meters (1,060-1,410 cubic feet) of cement could be enough to meet the daily power requirements of a residential house,” states Stefaniuk. “Given the broad adoption of concrete worldwide, this material expected to be highly profitable and useful for renewable energy collection.”

Stefaniuk and other researchers at MIT first demonstrated the notion by fabricating cent-sized 1V supercapacitors from the substance and connecting them in series to light a 3V LED. They subsequently scaled this up to create a 12V supercapacitor. Stefaniuk has also used larger supercapacitors to supply energy to a handheld gaming console.

The study team is now planning to develop larger variants, notably 1 up to 45 cubic meters (1,590 cubic feet) in size, capable of storing approximately 10 kWh of energy, enough to power a house for a single day.

How Carbon-Cement Supercapacitors Perform?

The supercapacitor works because carbon black has an uncommon property: it is highly conductive. This implies that whenever carbon black mixed with powdered cement and water, it produces a type of concrete rich in conductive networks, resembling ever-branching, microscopic roots.

The supercapacitor operates because carbon black has a unique property: it is extremely conductive. This means that when carbon black combined with granular cement and water, it forms a sort of cement rich in conductive networks that resemble ever-branching, microscopic roots.

When an electric current supplied to the salt-soaked platters, the positively charged ones acquired negatively charged ions from potassium chloride. Because the barrier stopped charged ions from passing between the plates, charge separation generated an electric field.

Advantages and Challenges of Supercapacitors:

Supercapacitors, which can amass enormous quantities of charge quickly, could be beneficial for storing surplus energy provided by intermittent energy sources like wind and solar. This would relieve the load on the grid when there is no wind or sun. According to Stefaniuk, “A straightforward illustration would involve an off-grid house driven by solar panels: utilizing solar energy freely during daylight and the power stored in, for instance, the basis during the night.”

Supercapacitors aren’t ideal. Existing versions dissipate power rapidly and are not suitable for continuous output, which need to power a house during the day. Stefaniuk says he and his coworkers are working on an approach that will allow them to tweak their carbon-cement version by modifying the mixture, yet they will not reveal any details until the testing completed and the paper is published


Supercapacitors are not optimal. Existing variants dissipate power quickly and are unsuitable for continuous output, as necessary to power a house throughout the day. Stefaniuk says he and his collaborators are working on a method that will allow them to fine-tune their carbon-cement variant by adjusting the mixture, but they will not share any details unless the testing is complete and the study published.