Berlin 2024 – scientific programme
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AKE: Arbeitskreis Energie
AKE 3: Poster
AKE 3.10: Poster
Tuesday, March 19, 2024, 12:00–14:00, Poster C
The stable nature of the decomposition interface in LiPON electrolyte with lithium anode — •Kangli Wang and Doreen Mollenhauer — Gießen/DE, Justus-Liebig-Universität Gießen, Heinrich-Buff-Ring 17, 35392 Gießen
All-solid-state batteries (ASSBs) have the potential to offer several advantages over the currently used liquid Li-ion battery technology. To improve the cell properties of ASSBs, it is to crucial to understand the interfaces between the Li-metal anode and the solid electrolytes (SE). Experimental efforts at the Li/LiPON interface revealed the decomposition products Li2O, Li3N, Li3P, and Li3PO4. Nevertheless, there is still a lack of deep understanding the Li/LiPON interface, particularly with respect to the interfacial decomposition and reconfiguration.
To take a step towards understanding ASSB interfaces, we explore in detail the role of different interfacial compositions and morphologies caused by decomposition reactions of the Li/LiPON interface. We investigate and characterize all possible occurring Li/LiPON interfaces (including Li/Li2O, Li/Li3N, Li/Li3P and Li/Li3PO4) and LiPON/LiPON interfaces (including Li2O/Li3N, Li2O/Li3P, Li2O/Li3PO4, Li3N/Li3P, Li3N/Li3PO4 and Li3P/Li3PO4) using density functional theory (DFT) calculations. We believe that our study provides a fundamental understanding to guide the future design of solid electrolytes and interfaces in ASSBs.
Keywords: battery; interface; DFT