Pukyong National University

Significant improvement in efficiency and energy density of sulfide-based solid-state batteries
Professor Oh Pil-gun

Growing concerns about the safety problem of large-capacity secondary batteries used in electric vehicles, researches on high-energy batteries for commercialization of next-generation solid-state batteries without explosion risk are getting attention. Professor Oh Pil-gun of Pukyong National University (Dept. of Graphic Arts Information Engineering, see photo) has been conducting research on the commercialization of sulfide-based solid-state batteries, the research results show that the efficiency of existing batteries is improved by 20 % while the ratio of electrolyte in the electrodes is reduced to greatly improve the energy density of the cells. Professor Oh pointed out the problems of current solid-state battery research in the present study as a high electrolyte ratio in the electrode, and proposed a new high-density, high-output electrode design using primary particle type NCM (nickel cobalt manganese oxide) and it is evaluated that he has greatly advanced commercialization of solid state battery. Professor Oh said, "So far, all previous solid-state battery studies have made electrode designs with higher electrolyte ratios of over 10% to improve the high interfacial resistance between the active-solid electrolytes. As a result, the energy density of the electrode is lowered, and the electron transport path in the electrode is blocked due to the high ratio of the electrolyte, thereby greatly increasing the electron resistance." The paper, "Advances and Prospects of Sulfide All-solid-state Lithium Batteries via One-to-one Comparison with Conventional Liquid Lithium Ion Batteries", is published in Advanced Materials (IF 21.95) Recently published. <기사보기 클릭!>

△ A new electrode design image of a sulfide-based solid-state battery.


11 June 2019

연구진
  오필건 교수 poh@pknu.ac.kr
  부경대학교 공과대학 고급에너지소재 연구실