Innovative technology that charges ultra-high-speed smartphones in just 20 seconds.

KAIST (Korea Institute of Science and Technology) EEWS Graduate School of Jiang Zhen seeking, Professor Kim Yong-smang 20, said the team can quickly charge and discharge and use more than 10,000 times the capacity loss will not occur in lithium-ion battery cathode material.

As the smartphone screen widens in the near future, the performance of central processing units (CPUs) has increased, and cell phone battery consumption has also increased. Limited by weight, the battery capacity can not be unlimited increase, manufacturers are now looking to improve the charging speed of the technology up.

The team made three-dimensional webs of graphene called "the dream's new material." Here, 6 nanometers (one nanometer equals one billionth of a meter) of titanium dioxide nanoparticles are covered by the film form. Thus, pores of various sizes made of three-dimensional network-shaped graphene and titanium dioxide nanoparticles serve to enhance the contact of the electrolyte. The result shows that the electron flow becomes smoother after the ion contact becomes easy.

Using the cathode thus made, the research team successfully fully charged and discharged a capacity of 130 mAh per milliampere in one minute and confirmed that there was no loss of capacity even if the process was run more than 10,000 times repeatedly fact.

Professor Jiang said that "just 20 seconds or so can reach today's smart phone battery capacity." "In practical applications, the current level of technology around can not achieve this level, but from the research and development to speed Look, it is likely to be commercialized within a year. "

The findings of this study have been published in the May 18 issue of the journal Materials in the Field of High Performance Materials.

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