| 학회 | 한국재료학회 |
| 학술대회 | 2016년 가을 (11/16 ~ 11/18, 경주 현대호텔) |
| 권호 | 22권 2호 |
| 발표분야 | C. 에너지 재료 분과 |
| 제목 | Solution method of Li2S-P2S5 glass-ceramics solid electrolyte for all-solid-state lithium ion batteries |
| 초록 | Solid electrolytes have been candidate for replacing organic liquid electrolytes because of their non-flammability. Sulfide-based solid electrolytes are known to show safety, reliability as well as high ion conductivity in comparison with the oxide-based electrolyte owing to high polarizability of sulfur ions. Among these, the Li2S-P2S5 sulfide electrolytes exhibit high lithium ion conductivity of more than 1x10-3 S/cm at room temperature and good electrochemical stabilities. Typically, the Li2S-P2S5 glass-ceramics are prepared by high energy mechanical ball milling process followed by heat-treatment. The Li2S-P2S5 particles obtained by the method have tens of micrometer scale, which particle size is significant to formation of thin electrolyte layer for high energy density. In this study, we suggest a new solution methd by using High Temperature & Pressure Technique (HTPT). The Li2S and P2S5 were weighed to appropriate ratio, and thereafter the mixture was put into a Teflon-lined stainless steel autoclave with insoluble organic liquid. The HTPT was conducted at the high temperature with continuously stirring. The obtained crystallite shows not only typical thio-LISICON III analogue but fine crystallite size. The 2032 type coin-cells were fabricated to identify electrochemical properties of all-solid-state lithium ion battery. |
| 저자 | 오승현, 최선호, 박종엽, 박찬휘, 신동욱 |
| 소속 | 한양대 |
| 키워드 | <P>All-solid-state lithium ion battery; Li<SUB>2</SUB>S-P<SUB>2</SUB>S<SUB>5</SUB> glass ceramics; solution synthesis</P> |
