Supercapacitors make it easy to quickly charge your cell phone

Fast, portable, ultra-cyclable capacitors are no longer difficult to find. Researchers at the University of Central Florida (UCF) used the new R&D process to complete the "system upgrade" of supercapacitors: they quickly recharged their phones in a matter of seconds. The technological innovation of electronic devices may be in this "corner."

Supercapacitors have many advantages such as high power density, short charge and discharge time, long cycle life, and safe and stable performance. They are one of the new energy storage devices that have received much attention in recent years. Among these, the new structure of electrode materials is the key to the performance of supercapacitors. .

For many years, scientists have been contemplating the use of nanomaterials to increase the number and stability of supercapacitor charge and discharge times. This time, UCF researchers used new two-dimensional materials with only a few atomic thicknesses to create new supercapacitors or dreams.

The test and comparison found that the number of charging and discharging of common lithium-ion batteries is about 1500 times; the number of charging and discharging of supercapacitors prepared by traditional two-dimensional materials is several thousand times; and the number of charging and discharging of new types of capacitors developed by UCF is about 30,000 times.

 “For small electronic devices, our materials outperform conventional materials that are widely used in the world today in terms of energy density, power density, and cycle stability,” said Nitin Choudhary, the first author of the article. The research results were published online in the ACS Nano journal published on October 12.

"How to integrate two-dimensional materials into existing systems of supercapacitors is a key point in improving the performance of supercapacitors and a bottleneck in current technological developments. Previous research teams have used graphene or other two-dimensional materials for supercapacitors. The improvement, but without success, we innovatively use a simple chemical synthesis method to integrate 2D materials into the supercapacitor's existing system to achieve rapid charging.” Yeonwoong Jung said.

Scientists have realized the good prospects of the application of energy storage in two-dimensional materials and are committed to the development of better energy storage devices. At present, high-energy-density supercapacitors can gradually be used to quickly charge mobile phones in a matter of seconds. On the basis of this, future technology products based on health, entertainment, travel, and social networking will no longer be exposed to sockets. And external power restrictions.