Structural evolution and phase transformation characteristics of amorphous silicon upon lithiation and delithiation
EMSL Project ID
48106
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
2013-06-25
End Date
2013-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Gu M, LR Parent, BL Mehdi, RR Unocic, MT Mcdowell, RL Sacci, W Xu, JG Connell, P Xu, P Abellan Baeza, X Chen, Y Zhang, DE Perea, JE Evans, L Lauhon, J Zhang, J Liu, ND Browning, Y Cui, I Arslan, and CM Wang. 2013. "Demonstration of an Electrochemical Liquid Cell for Operando Transmission Electron Microscopy Observation of the Lithiation/Delithiation Behavior of Si Nanowire Battery Anodes." Nano Letters 13(12):6106-6112. doi:10.1021/nl403402q