Foreign media: Scientists invent collapsible graphene batteries

Scientists have used previous findings to create a new graphene folding device that stores energy, according to a study published in the British journal Nature Energy. In 2004, two researchers from the University of Manchester, Andrei Haim and Konstantin Novoselov, stripped a very thin layer of graphene from the graphite, Le Monde reported on February 17.

Ultra-thin graphene has proved to be flexible, a good thermal and electrical conductor, lighter than paper, but 200 times harder than steel.

Media: Scientists invent collapsible graphene batteries

After the first phase of research and classification, research around graphene began to stall, the report said. The actual use of graphene is also difficult, in large part because one of its fascinating main features, the super hardness, also makes it difficult to process.

In recent years, however, graphene has again come into focus. In 2018, the team of Spanish scientists at the Massachusetts Institute of Technology, Pablo Harillo-Herrero, discovered that when two layers of graphene are entangled at a “magical angle”, they exhibit unconventional superconductivity.

As a result, a new research trail has been opened, the report said. Now, scientists at University College London have used previous findings to create a new graphene folding device that stores energy. The supercapacitor can fold up to 180 degrees without loss of performance and can maintain 97.8% capacitance after 5,000 charges.

Media: Scientists invent collapsible graphene batteries

The supercapacitor measures 6 cm in size and consists of two electrodes, with the film in the middle being used as a medium for transmitting charges. Researchers have used the device to successfully light up dozens of LED lights. The new results address recurring problems in battery manufacturing: it is difficult to store large amounts of energy in small spaces.

“We used materials that enabled our supercapacitors to have high power density while at the same time,” the researchers said. Typically, having only one of these characteristics is achievable, but having two characteristics at the same time is undoubtedly a significant development. “