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| Home > Publications database > Attaining a fast-conducting, hybrid solid state separator for all solid-state batteries through a facile wet infiltration method |
| Journal Article | FZJ-2025-04075 |
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2025
Royal Society of Chemistry
Beijing
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Please use a persistent id in citations: doi:10.1039/D5YA00141B doi:10.34734/FZJ-2025-04075
Abstract: Thin, fast-conducting and mechanically robust separators are expected to be advantageous in enabling all-solid-state batteries with high energy densities and good electrochemical performance. In this study, a potentially new scalable fabrication route for flexible thiophosphate–polymer separator membranes is demonstrated. By infiltrating a commercially available polymer mesh with the highly conductive inorganic solid ion conductor $Li_{5.5}PS_{4.5}Cl_{1.5}$, a hybrid separator membrane with a high ionic conductivity is realized. The electrochemical evaluation via rate capability tests reveals superior performance at low stack pressures and high C-rates, when comparing cells employing the hybrid membrane separator, to cells utilizing conventional solid electrolyte separators. As a proof of concept, a full cell implementing the hybrid membrane between a Si-based anode and a $LiNi_{0.83}Co_{0.11}Mn_{0.06}O_2–Li_{5.5}PS_{4.5}Cl_{1.5}$ composite cathode is evaluated. The experimental work is complemented by resistor network modelling of the hybrid membrane sheets, shedding light on potential challenges in cell operation.
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