Next-Gen Hybrid Battery
S. Korean Scientists Develop 100 Times Faster Battery Charging Technology
A group of South Korean scientists has developed a next-generation battery technology that can charge up to 100 times faster than lithium-ion secondary batteries.
The Ministry of Science, ICT and Future Planning announced on October 10 that the research team led by Kang Jeong-ku, a professor at the Graduate School of Energy, Environment, Water and Sustainability of the Korea Advanced Institute of Science and Technology (KAIST), developed the new hybrid energy storage technology that combines pros of lithium-ion secondary batteries and supercapacitors. Hybrid Interface Materials, one of the science ministry's research arms, supported the research through its global frontier program.
Existing lithium-ion batteries can store a large amount of electricity due to high energy storage density. However, they have the weakness of taking too long to charge and discharge. As an alternative, a new storage mechanism called a supercapacitor was developed. These batteries have high energy output but low charging capability due to low energy density.
The research team has developed a new battery electrode material that can apply to two storage devices at the same time in order to integrate two different energy storage mechanisms of lithium-ion batteries and supercapacitors. The new material is a porous nanotube that has pore sizes of few to few tens of nanometers so that positive and negative ions can easily get through electrolytes and internal spaces. The new hybrid energy storage technology has 1.5 times higher energy density than that of the lithium ion battery, and can reach 130Wh/kg of energy storage density in 20 seconds at maximum output due to 100 times higher charging and output property than that of the lithium ion battery.
Kwang-ho, director of Hybrid Interface Materials, said, “The researchers have developed a source material with fast charging speed that has high-capacity energy storage density and unprecedentedly superior energy input and output properties. The new technology will be essential to batteries for electric vehicles (EVs) and mobile devices in the future.”
The research findings were published in the international science journal "Advanced Energy Materials.
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