The ongoing development in the field of solid-state batteries faces the challenge of successfully transferring high-energy lithium-metal anodes into industrial applications. The BMBF-funded project "FB2-SiSuFest" is investigating anode materials based on silicon nitride (SiNx) as a promising alternative to conventional solutions. This material could make an important contribution to the development of high-performance, safe and stable battery cells. Research activities focus on the production and evaluation of silicon nitride-based particles as anode material in sulfide solid-state batteries.
Research within the FestBatt cluster focuses on different variants of sulfide-based solid-state batteries, among others, as pioneering technologies. Despite progress, a number of questions remain about the successful application of the high-energy lithium-metal anode. Silicon could offer itself as an alloy-forming active material. However, there are still challenges due to electrochemical and morphological instabilities. These could be overcome by using silicon nitrides in the form of amorphous nanoparticles by creating advantageous phases during the charging and discharging process. The main objective of the research network is to further develop innovative SiNx active materials and evaluate them in composite anodes and sulphide solid-state batteries.
