Studying the role of Si particle size distribution in Si-anode based solid-state batteries by operando X-ray diffraction

Silicon is one of the most promising anode materials for next-generation solid-state batteries (SSBs), due to its very high specific capacity. Although SSBs utilizing silicon anodes show broad and attractive application prospects, current results are still in an infant state in terms of electrochemical performance, characterization, and mechanistic understanding. Hence, this study focuses on the role of Si particle size distribution in a composite anode on the electrochemical performance of SSBs, which is of high relevance for future applications in, e.g. EVs. Therefore, we will use an operando set-up, recently developed together with the ESRF beamline stuff, to study how the particle size distribution of Si affects the phase and microstructural evolution and mechanical degradation as a function of capacity utilizations, applied current, and stack pressure.