상세정보
학술지
All-solid-state Lithium-ion Batteries with TiS2 Nanosheets and Sulphide Solid Electrolytes
- 저자
- 오대양, 최영은, 김동현, 이영기, 김병수, 박종남, 손희상, 정윤석
- 발행일
- 201607
- 출처
- Journal of Materials Chemistry A : Materials for Energy and Sustainability, v.4 no.26, pp.10329-10335
- ISSN
- 2050-7488
- 출판사
- Royal Society of Chemistry (RSC)
- 협약과제
- 15PB4600, 중대형 전고체 리튬이차전지용 유무기 하이브리드 고체전해질, 이영기
- 초록
- Bulk-type all-solid-state lithium-ion batteries (ASLBs) using sulphide solid electrolytes (SEs) are considered as one of the promising alternative batteries because of their ultimate safety and scalable fabrication. However, they suffer from poor ionic contacts between active materials and SEs. Herein, we report, for the first time, the excellent electrochemical performances of sulphide-SE-based bulk-type ASLBs employing TiS2 nanosheets (TiS2-NSs) prepared by scalable mechanochemical lithiation, followed by exfoliation in water under ultrasonication. The TiS2-NS in all-solid-state cells exhibits an enhancement of reversible capacity which is attributed to the SE region in intimate contact with TiS2-NSs. Importantly, an exceptionally superior rate capability of the TiS2-NS compared to that of bulk TiS2 and even ball-milled TiS2, which is attributed to the ultrathin 2D structure (with short Li-ion diffusion length and intimate contacts between the TiS2-NS and SE) and high electronic conductivity, is highlighted.
- KSP 제안 키워드
- 2D structure, Active materials, All-solid-state cells, Ball-milled, Diffusion length, Electrochemical performance, Intimate contact, Li-ion diffusion, Reversible capacity, Solid electrolyte, all-solid-state lithium-ion batteries