Pukyong National University

Developed high-capacity, high-speed cathodic material for electric car battery
Professor Ko Min-seong

Next-generation cathodic material, which greatly increases the capacity and charge rate of lithium-ion batteries used in electric vehicles, has been developed. Professor ko Min-seong (Department of Metallurgical Engineering, PKNU) collaborated with Professor Jo Jae-pil of Ulsan Institute of Science and Technology (UNIST) to write a paper entitled "Fast-charging high-energy lithium-ion batteries via implantation of amorphous silicon nanolayer in edge-plane activated graphite anodes" in the online edition of Nature’s sister magazine, ’Nature Communications’. Professor Ko has developed an ’edge activated graphite/silicon complex’ that has a charge rate 1.5 times faster and a capacity increase of 50% than that of graphite used as an anode material in existing lithium ion batteries. In this study, Professor Ko said that by activating the edges of graphite by nickel catalytic reduction method, it can greatly improve the fast-charging characteristics, while the inside and outside of graphite can be measured by monosilane chemical vapor deposition method with a nanometer (one nanometer is one billionth of a meter) thick amorphous silicon to maximize the energy density and to improve the stability of the battery by coating the graphite carbon protective layer. The ’edge activated graphite/silicon composite’ developed in this way significantly increased the reaction rate with lithium ion during charging and discharging of the battery and decreased the moving distance of electron transfer and lithium ion, thereby greatly increasing the fast charging characteristic of the battery. <기사보기 클릭!>

△ Image of development process of edge activated graphite/silicon complex.


17 October 2017

연구진
  고민성 교수 msko876@pknu.ac.kr
  부경대학교 공과대학 차세대 에너지저장소재 연구실