Observation of Interfacial Degradation of Li6PS5Cl against Lithium Metal and LiCoO2 via In Situ Electrochemical Raman Microscopy



Zhou, Yundong ORCID: 0000-0001-9222-5722, Doerrer, Christopher, Kasemchainan, Jitti, Bruce, Peter G, Pasta, Mauro and Hardwick, Laurence J ORCID: 0000-0001-8796-685X
(2020) Observation of Interfacial Degradation of Li6PS5Cl against Lithium Metal and LiCoO2 via In Situ Electrochemical Raman Microscopy. BATTERIES & SUPERCAPS, 3 (7). pp. 647-652.

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Abstract

Sulfide-based Li+ conducting solid electrolytes, such as argyrodite, Li6PS5Cl, for all-solid-state batteries can have comparable ionic conductivities with liquid electrolytes. However, the interface between sulfide containing solid electrolytes and Li metal and Li-ion positive electrodes has been found to be unstable, leading to poor cell performance and cycling. Understanding the in situ evolution of interfacial layers between the electrolyte and both electrodes is of paramount importance for designing stable and long-life solid-state batteries. Here, in situ Raman microscopy was used to study the interface between Li6PS5Cl electrolyte and metallic Li and LiCoO2. Under potential control, Raman microscopy identified the appearance of degradation products (Li2S, P2Sx and polysulfides) at the electrode/solid electrolyte interface.

Item Type: Article
Uncontrolled Keywords: electrode-solid electrolyte interface, electrochemistry, in situ Raman microscopy, interfaces, solid-state batteries
Depositing User: Symplectic Admin
Date Deposited: 01 Apr 2020 11:15
Last Modified: 18 Jan 2023 23:56
DOI: 10.1002/batt.201900218
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3080776