The limited reserve is holding back the spread of electric cars. South Korean scientists have developed a new technology that will help to solve this problem.
Lithium-ion batteries used in most modern electric cars have limitations. They are high cost and low capacity. And the charging process takes a long time. Scientists from the Institute of science and technology in South Korea have discovered another useful application of the wonder substance called graphene.
The new technology is the supercapacitor, not a battery, although both devices are used to store energy. The supercapacitor stores energy on the surface of materials in the form of static electricity.
Graphene is a modification of carbon with a thickness of just one atom. A small amount of material with incredible surface area makes it ideal for use in supercapacitors. So, one gram of graphene can cover an area of 2,675 square meters.
Theoretically, graphene supercapacitors can be used to store much more energy per kilogram compared to lithium-ion batteries.
Scientists have managed to produce enough material for use in supercapacitor, writes the Economist. First they got the graphite oxide, and then heated it to separate into graphene sheets. After removing the extra oxygen graphene sheets were incorporated into the supercapacitor.
The resulting device showed the ability to recharge in less than four minutes. In the future, the researchers hope to develop an improved version of the supercapacitor, which will surpass Li-ion battery capacity.
The next step will be scaling and commercialization of the technology.published
P. S. And remember, only by changing their consumption — together we change the world! ©