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Concentration dependent properties lead to plastic ratcheting in thin island electrodes on substrate under cyclic charging and discharging

Journal Article · · Acta Materialia
It is known that the mechanical properties of electrodes in lithium-ion batteries, such as modulus, yield stress, and interfacial strength, can depend strongly on lithium concentration. Furthermore we show that a thin film island electrode with properties dependent on lithium concentration naturally undergoes plastic ratcheting with accumulative deformation and failure during cyclic charging and discharging. Some key predictions from numerical simulations are validated by galvanostatic tests. Strategies to avoid ratcheting include limiting the electrode size and/or selecting a balanced combination of concentration dependent materials properties.
Research Organization:
Brown Univ., Providence, RI (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Grant/Contract Number:
EE0007787
OSTI ID:
1847161
Alternate ID(s):
OSTI ID: 1614063
OSTI ID: 1636967
Journal Information:
Acta Materialia, Journal Name: Acta Materialia Journal Issue: 164 Vol. 164; ISSN 1359-6454
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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