DataVXACS Applied Materials & InterfacesPaper
journal article·2020-10-21Open access

Blade-Type Reaction Front in Micrometer-Sized Germanium Particles during Lithiation

Xinwei Zhou, Tianyi Li, Yi Cui, Melissa L. Meyerson, Jason A. Weeks, C. Buddie Mullins, Yang Jin, Hosop Shin, Yuzi Liu, Likun Zhu

ACS Applied Materials & Interfaces· Volume 12· Issue 42
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Source abstract

Abstract

To investigate the lithium transport mechanism in micrometer-sized germanium (Ge) particles, in situ focused ion beam–scanning electron microscopy was used to monitor the structural evolution of individual Ge particles during lithiation. Our results show that there are two types of reaction fronts during lithiation, representing the differences of reactions on the surface and in bulk. The cross-sectional SEM images and transmission electron microscopy characterizations show that the interface between amorphous LixGe and Ge has a wedge shape because of the higher Li transport rate on the surface of the particle. The blade-type reaction front is formed at the interface of the amorphous LixGe and crystalline Ge and is attributed to the large strain at the interface.
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Research context

OpenAlex topics: Advancements in Battery Materials · Semiconductor materials and interfaces · Semiconductor materials and devices

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Affiliations

Department of Mechanical and Energy Engineering, Indiana University Purdue University Indianapolis, Indianapolis, Indiana 46202, United States

Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States

Departments of Chemical Engineering and Chemistry, University of Texas at Austin, Austin, Texas 78712, United States

Department of Electrical Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China

Funding

Welch Foundation · Division of Chemical, Bioengineering, Environmental, and Transport Systems

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