Controlling of the ratio of submicron particles and size effects in SiO anode for Li-ion batteries

SiO, with a high theoretical specific capacity and acceptable volume variation, is considered one of the most promising next-generation anode materials. However, there is limited research on the effect of SiO particle size distribution on the electrochemical performance of LIBs. In this study, we investigated the impact of the ratio of submicron particles (0.1 μm to 1 μm) on the electrochemical performance. It found that a combination of micron and submicron particles with the ratio of submicron particles (RoS) in processed SiO at around 90 % resulted in optimal enhanced capacity and cycling stability, while the remaining 10 % of micron particles mitigate the side reactions caused by excessive surface area. This work is believed to provide a new perspective for inspiring long-span life SiO-based LIBs.