A multi-modal approach to understanding the structural evolution and phase transformation of amorphous silicon upon lithiation insertion and extraction
EMSL Project ID
48146
Abstract
Amorphous silicon (a-Si) has been identified as a candidate high capacity anode material for lithium ion batteries. A fundamental challenge with a-Si is the large volume change upon lithium insertion/extraction. In the proposed research, we will probe the structural and chemical evolution characteristics of a-Si upon lithium ion insertion/extraction, aiming to provide information ranging from atomic to nanometer scale on how a-Si accommodates lithium insertion/extraction through understanding of chemical and physical interactions between Li and Si at the atomic scale. The fundamental understanding of the behavior of a-Si will provide guidance to the design of materials based on a-Si for longer cycle life of battery. To accomplish this task, we will rely on a multi-modal approach combining experimental and computational tools.
Project Details
Start Date
2013-11-05
End Date
2014-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Gao Q, M Gu, A Nie, F Mashayek, CM Wang, GM Odegard, and R Shahbazian-Yassar. 2014. "Direct Evidence of Lithium-Induced Atomic Ordering in Amorphous TiO2 Nanotubes ." Chemistry of Materials 26(4):1660-1669. doi:10.1021/cm403951b