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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

Team

Principal Investigator

Scott Lea
Institution
Environmental Molecular Sciences Laboratory

Team Members

Arun Devaraj
Institution
Pacific Northwest National Laboratory

Daniel Perea
Institution
Environmental Molecular Sciences Laboratory

Meng Gu
Institution
Pacific Northwest National Laboratory

Amity Andersen
Institution
Environmental Molecular Sciences Laboratory

Niranjan Govind
Institution
Pacific Northwest National Laboratory

Mark Bowden
Institution
Pacific Northwest National Laboratory

Kevin Glass
Institution
Environmental Molecular Sciences Laboratory

Chongmin Wang
Institution
Environmental Molecular Sciences Laboratory

Theva Thevuthasan
Institution
Environmental Molecular Sciences Laboratory

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