Amorphous silicon nanoparticles for the next generation lithium-ion batteries

Amorphous silicon nanoparticles for the next generation lithium-ion batteries

Presenter: Dr. Alexey Y. Koposov
Title: Amorphous silicon nanoparticles for the next generation lithium-ion batteries
Affiliation: IFE Institute for Energy Technology

Abstract

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.

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Dr. Alexey Koposov
Dr. Alexey Y. Koposov is a Senior Scientist at the Institute for Energy Technology (IFE). His research activities are mainly focused on chemistry of materials for energy applications. He graduated from Moscow State University (Russia) with a degree in Materials Science in 2001. After obtaining his PhD degree from University of Minnesota in 2005, he joined Los Alamos National Laboratory. In 2011 he accepted a position of Senior Scientist at the SHARP Laboratories of America – part of R&D division of SHARP Corporation, where he led the development of nanomaterials for energy applications. After joining IFE in 2017 his main research focus is the development of silicon-based materials for advanced batteries. Dr. Koposov is an author of more than 40 research articles and number of patents.