화학공학소재연구정보센터
학회 한국재료학회
학술대회 2017년 가을 (11/15 ~ 11/17, 경주 현대호텔)
권호 23권 2호
발표분야 14. 에너지 저장 및 하베스팅 특별심포지엄(Energy storage and harvesting special symposium)
제목 Enhancing Lithium-Ion Conduction in Oxide-Based Solid Electrolytes via Microstructural Engineering
초록 Solid electrolytes are key to the evolution of all-solid-state lithium batteries as next-generation energy storage systems. High ionic conductivity and stability of solid electrolytes are critical requirements in designing reliable all-solid-state lithium batteries. Inorganic materials such as Li3xLa(2/3)−x(1/3)-2xTiO3 (LLTO) and Li1+xAlxTi2-x(PO4)3 (LATP) have received much attention as potential solid electrolytes to replace current organic liquid electrolytes; however, their practical use is limited by its low total conductivity. With the aim of improving the ionic conductivity, we investigate a correlation between the microstructures and Li+ conducting properties of solid electrolytes. We show that the total conductivity is dominated by the domain/grain boundary resistances, and the synthesis condition of the electrolytes (sintering temperature, Li concentration, and additive) has a crucial role in modifying the microstructure and composition of the domain/grain boundaries to significantly reduce the boundary resistance. The findings of this study would be essential in understanding Li+ conducting behaviors and in developing highly conductive inorganic solid electrolytes.
저자 이종원1, 정규남2, 박민식3
소속 1조선대, 2한국에너지기술(연), 3경희대
키워드 All-solid-state lithium battery; solid electrolyte; lithium-ion conductivity; microstructural engineering
E-Mail jongwon@chosun.ac.kr