Robust solid-state interface with a deformable glass interlayer in sulfide-based all-solid-state batteries

Title
Robust solid-state interface with a deformable glass interlayer in sulfide-based all-solid-state batteries
Authors
김병국이종호김형철지호일양성은박상백전민재최성준정으뜸상병인
Keywords
Elastic interface layer; Metallic electrode; Glass sulfide; Li-ion conductor; All-solid-state battery
Issue Date
2020-03
Publisher
Solid state ionics
Citation
VOL 346-115217-6
Abstract
We introduced a new elastic interface layer (EIL), (Li2S)0.75(P2S5)0.25 glass, in all-solid-state batteries (ASSBs) to improve the solid-state interfacial structure, and analyzed its structural evolution in electrochemical charge/discharge cycles. This EIL had a lower bulk modulus, thereby providing good powder processability and high mechanical deformability against volume changes of the electrode. Compared to a cell configuring EIL, the reference cell exhibited a considerable increase in the electrolyte resistance; moreover, a new resistance component was identified in the high-frequency region (500– 50 kHz). This high-resistance component resulting from interfacial deterioration such as metal fragmentation and micropore formation was successfully suppressed by applying a mechanically deformable EIL. We believe that this study would provide insights into the application of EIL for configuring a stable interface with a metallic electrode in ASSBs.
URI
http://pubs.kist.re.kr/handle/201004/70924
ISSN
0167-2738
Appears in Collections:
KIST Publication > Article
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