Presenter: Dr. Alexey Y. Koposov
Title: Amorphous silicon nanoparticles for the next generation lithium-ion batteries
Affiliation: IFE Institute for Energy Technology
Silicon as a negative electrode material attracts significant research and development attention for next-generation lithium-ion batteries (LIBs). However, the enormous volume change (300%) during lithiation and delithiation is the primary reason why silicon is not widely adopted in LIBs. To counteract the high-volume expansion associated with lithiation, silicon nanoparticles emerged as materials engineered to extend cycle life. Within this presentation we will provide an overview of the advantages and disadvantages of amorphous silicon prepared through the pyrolysis of silane and compare its performance to its crystalline competitors. We will also demonstrate that temperature and silane concentration during synthesis influence the size and morphology of the silicon nanoparticles. Furthermore, postprocessing of amorphous silicon may increase or decrease its lifetime as an active material in LIB.