Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.220
Publication date: 11th July 2022
The possibility of developing practical solid-state batteries (SSBs) has gained momentum in recent years thanks to striking advances at the material level, such as the discovery of new highly-conducting solid-state electrolytes. However, the development of SSBs still faces formidable challenges, such as the integration of the various components, the functionality at full cell level, and the scalability of the fabrication processes.[1] Inorganic solid electrolytes stand out for their high Li-ion conductivity but exhibit drawbacks such as low electrochemical stability (sulfides) or rigidity (oxides, phosphates). Indeed, oxide and phosphate-based electrolytes usually require temperature-assisted densification methods that, when applied to composite cathodes, can induce chemical reactivity among the different cathode components resulting in resistive interfaces and by-products.
In this talk we will discuss our recent work regarding oxide and phosphate-based ion-conductors, including the recent synthesis and characterization of a new form of crystalline LiPON,[2] processing challenges of rigid ceramic materials (in particular regarding high temperature material compatibility in composite cathodes), and low-temperature densification strategies, which in turn allow to shed light into grain-boundary contributions to the total ionic conductivity of the studied materials.
The authors acknowledge financial support for grant PID2019-107106RB-C33 funded by MCIN/AEI /10.13039/501100011033 and Ikerbasque Science foundation.
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