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Title: Operando Synchrotron Measurement of Strain Evolution in Individual Alloying Anode Particles within Lithium Batteries

Abstract

Alloying anode materials offer high capacity for next-generation batteries, but the performance of these materials often decays rapidly with cycling because of volume changes and associated mechanical degradation or fracture. The direct measurement of crystallographic strain evolution in individual particles has not been reported, however, and this level of insight is critical for designing mechanically resilient materials. Here, we use operando X-ray diffraction to investigate strain evolution in individual germanium microparticles during electrochemical reaction with lithium. The diffraction peak was observed to shift in position and diminish in intensity during reaction because of the disappearance of the crystalline Ge phase. The compressive strain along the [111] direction was found to increase monotonically to a value of -0.21%. This finding is in agreement with a mechanical model that considers expansion and plastic deformation during reaction. This new insight into the mechanics of large-volume-change transformations in alloying anodes is important for improving the durability of high-capacity batteries.

Authors:
 [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [3]
  1. School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332, United States
  2. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
  3. School of Materials Science and Engineering, Georgia Institute of Technology, 771 Ferst Drive, Atlanta, Georgia 30332, United States; G.W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, 801 Ferst Drive, Atlanta, Georgia 30332, United States
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1417191
DOE Contract Number:
AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: ACS Energy Letters; Journal Volume: 3
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE

Citation Formats

Cortes, Francisco Javier Quintero, Boebinger, Matthew G., Xu, Michael, Ulvestad, Andrew, and McDowell, Matthew T.. Operando Synchrotron Measurement of Strain Evolution in Individual Alloying Anode Particles within Lithium Batteries. United States: N. p., 2018. Web. doi:10.1021/acsenergylett.7b01185.
Cortes, Francisco Javier Quintero, Boebinger, Matthew G., Xu, Michael, Ulvestad, Andrew, & McDowell, Matthew T.. Operando Synchrotron Measurement of Strain Evolution in Individual Alloying Anode Particles within Lithium Batteries. United States. doi:10.1021/acsenergylett.7b01185.
Cortes, Francisco Javier Quintero, Boebinger, Matthew G., Xu, Michael, Ulvestad, Andrew, and McDowell, Matthew T.. 2018. "Operando Synchrotron Measurement of Strain Evolution in Individual Alloying Anode Particles within Lithium Batteries". United States. doi:10.1021/acsenergylett.7b01185.
@article{osti_1417191,
title = {Operando Synchrotron Measurement of Strain Evolution in Individual Alloying Anode Particles within Lithium Batteries},
author = {Cortes, Francisco Javier Quintero and Boebinger, Matthew G. and Xu, Michael and Ulvestad, Andrew and McDowell, Matthew T.},
abstractNote = {Alloying anode materials offer high capacity for next-generation batteries, but the performance of these materials often decays rapidly with cycling because of volume changes and associated mechanical degradation or fracture. The direct measurement of crystallographic strain evolution in individual particles has not been reported, however, and this level of insight is critical for designing mechanically resilient materials. Here, we use operando X-ray diffraction to investigate strain evolution in individual germanium microparticles during electrochemical reaction with lithium. The diffraction peak was observed to shift in position and diminish in intensity during reaction because of the disappearance of the crystalline Ge phase. The compressive strain along the [111] direction was found to increase monotonically to a value of -0.21%. This finding is in agreement with a mechanical model that considers expansion and plastic deformation during reaction. This new insight into the mechanics of large-volume-change transformations in alloying anodes is important for improving the durability of high-capacity batteries.},
doi = {10.1021/acsenergylett.7b01185},
journal = {ACS Energy Letters},
number = ,
volume = 3,
place = {United States},
year = 2018,
month = 1
}
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