Observation of Interfacial Degradation of Li₆PS₅Cl against Lithium Metal and LiCoO₂ via <i>In Situ</i> 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 <i>In Situ</i> Electrochemical Raman Microscopy. BATTERIES & SUPERCAPS, 3 (7). pp. 647-652.

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Abstract

<jats:title>Abstract</jats:title><jats:p>Sulfide‐based Li<jats:sup>+</jats:sup> conducting solid electrolytes, such as argyrodite, Li<jats:sub>6</jats:sub>PS<jats:sub>5</jats:sub>Cl, 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 <jats:italic>in situ</jats:italic> evolution of interfacial layers between the electrolyte and both electrodes is of paramount importance for designing stable and long‐life solid‐state batteries. Here, <jats:italic>in situ</jats:italic> Raman microscopy was used to study the interface between Li<jats:sub>6</jats:sub>PS<jats:sub>5</jats:sub>Cl electrolyte and metallic Li and LiCoO<jats:sub>2</jats:sub>. Under potential control, Raman microscopy identified the appearance of degradation products (Li<jats:sub>2</jats:sub>S, P<jats:sub>2</jats:sub>S<jats:sub><jats:italic>x</jats:italic></jats:sub> and polysulfides) at the electrode/solid electrolyte interface.</jats:p>

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:	07 Oct 2023 10:24
DOI:	10.1002/batt.201900218
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3080776