Quantitative determination of lithium depletion during rapid cycling in sulfide-based all-solid-state batteries

We propose a promising electrochemical analysis tool based on the distribution of relaxation times (DRT) to quantify interfacial resistances towards a comprehensive understanding of complex solid-state interfacial phenomena in sulfide-based all-solid-state batteries (ASSBs). Using DRT-assisted imped...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2021-04, Vol.57 (28), p.3453-3456
Main Authors: Shin, Sung Soo, Kim, Ji-Su, Choi, Sungjun, Ji, Ho-Il, Yoon, Kyung Joong, Lee, Jong-Ho, Chung, Kyung Yoon, Kim, Hyoungchul
Format: Article
Language:English
Subjects:
Depletion
Electrochemical analysis
Lithium niobates
Molten salt electrolytes
Solid electrolytes
Solid state
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Summary:We propose a promising electrochemical analysis tool based on the distribution of relaxation times (DRT) to quantify interfacial resistances towards a comprehensive understanding of complex solid-state interfacial phenomena in sulfide-based all-solid-state batteries (ASSBs). Using DRT-assisted impedance analysis, we identify a new resistance component in the range of 10 2 -10 3 Hz of 3.5 and 0.9 Ω in the absence and presence of a LiNbO 3 layer, respectively, at 1C-rate. Experimental and computational studies confirm that this interfacial resistance results from lithium depletion in sulfide solid electrolytes. Furthermore, we expect our approach to provide new insights into complex interfacial phenomena in ASSBs. Advanced techniques based on the distribution of relaxation times to quantify the complex interfacial resistances in all-solid-state batteries were applied.
ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc08367d