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Journal Article
All-solid-state Lithium-ion Batteries with TiS2 Nanosheets and Sulphide Solid Electrolytes
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- Authors
- Dae Yang Oh, Young Eun Choi, Dong Hyeon Kim, Young-Gi Lee, Byeong-Su Kim, Jongnam Park, Hiesang Sohn, Yoon Seok Jung
- Issue Date
- 2016-07
- Citation
- Journal of Materials Chemistry A : Materials for Energy and Sustainability, v.4, no.26, pp.10329-10335
- ISSN
- 2050-7488
- Publisher
- Royal Society of Chemistry (RSC)
- Language
- English
- Type
- Journal Article
- Abstract
- 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 Keywords
- 2D structure, Active materials, All-solid-state cells, Ball-milled, Diffusion length, Electrochemical performance, Intimate contact, Li-ion diffusion, Lithium-ion batteries(LIBs), Solid electrolyte, all-solid-state lithium-ion batteries