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Title: Grid indentation analysis of mechanical properties of composite electrodes in Li-ion batteries

Journal Article · · Extreme Mechanics Letters
ORCiD logo [1];  [1]; ORCiD logo [2];  [1]
  1. Purdue Univ., West Lafayette, IN (United States). School of Mechanical Engineering
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Energy and Transportation Science Division
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We report that electrodes in commercial rechargeable batteries are microscopically heterogeneous materials. The constituent components, including active materials, polymeric binders, and porous conductive matrix, often have large variation in their mechanical properties, making the mechanical characterization of composite electrodes a challenging task. In a model system of LiNi0.5Mn0.3Co0.2O2 cathode, we employ the instrumented grid indentation to determine the elastic modulus and hardness of the constituent phases. The approach relies on a large array of nanoindentation experiments and statistical analysis of the resulting data provided that the maximum indentation depth is carefully chosen. The statistically extracted properties of the active particles and the surrounding medium are in good agreement with the tests of targeted indentation at selected sites. Lastly, the combinatory technique of grid indentation and statistical deconvolution represents a fast and reliable route to quantify the mechanical properties of composite electrodes that feed the parametric input for the mechanics models.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V); USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1302942
Alternate ID(s):
OSTI ID: 1397349
Journal Information:
Extreme Mechanics Letters, Journal Name: Extreme Mechanics Letters; ISSN 2352-4316
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 65 works
Citation information provided by
Web of Science

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Cited By (8)

Operando Nanoindentation: A New Platform to Measure the Mechanical Properties of Electrodes during Electrochemical Reactions journal January 2017
Mechanical characterization by multiscale instrumented indentation of highly heterogeneous materials for braking applications journal November 2018
Communication—Fracture Behavior of Single LiNi 0.33 Mn 0.33 Co 0.33 O 2 Particles Studied by Flat Punch Indentation journal January 2019
Failure modes and mechanisms for rechargeable Lithium-based batteries: a state-of-the-art review journal November 2018
Chemomechanical modeling of lithiation-induced failure in high-volume-change electrode materials for lithium ion batteries journal February 2017
Three‐dimensional simulation of transport processes within blended electrodes on the particle scale journal July 2019
Mechanistic understanding of intergranular cracking in NCM cathode material: mesoscale simulation with three-dimensional microstructure journal January 2018
Three‐dimensional simulation of transport processes within blended electrodes on the particle scale text January 2019

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