Proceedings of Materials for Sustainable Development Conference (MAT-SUS) (NFM22)
DOI: https://doi.org/10.29363/nanoge.nfm.2022.238
Publication date: 11th July 2022
All-solid-state thin-film batteries (TFBs) combine several features of solid-state batteries, such as long lifetime, high charge/discharge rates, and safety with the potential of large-scale manufacturing using physical vapor deposition (PVD) methods. The talk will review several research highlights from our group on how to build an efficient TFB. These include flash-lamp annealing of layered oxide cathodes that enable thin and flexible aluminum foils to be used as conductive substrates [1], engineering a cathode/electrolyte interface with Nb2O5 interlayers for a fast ionic transport [2], exploiting ultra-thin amorphous LLZO electrolytes to block lithium dendrites [3], and inserting amorphous carbon interlayers at the Cu/LIiPON interface to facilitate homogeneous Li plating and stripping in an anode-free configuration [4]. At last, we will present the concept of monolithic multi-cell (so-called bipolar) TFBs fabricated with PVD methods, which could resolve the principal handicap of the low specific and areal capacity in TFBs and lead to a new generation of high-power solid-state batteries.
This research was supported by the Swiss National Science Foundation (project no. 200021_172764), Empa internal project “a-CARBON-battery”, Strategic Focus Area (SFA) Advanced Manufacturing of the ETH Domain (project “SOL4BAT”), and a joint Empa-Fraunhofer ISC project ”IE4B” under the ICON funding line.
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