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Young's modulus of polycrystalline Li22Si5

✍ Scribed by J.B. Ratchford; B.E. Schuster; B.A. Crawford; C.A. Lundgren; J.L. Allen; J. Wolfenstine

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
390 KB
Volume
196
Category
Article
ISSN
0378-7753

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✦ Synopsis

In order for Li-Si alloys to be used in Li-ion batteries as anodes, knowledge of their mechanical properties, such as Young's moduli, is crucial. Young's modulus of polycrystalline Li 22 Si 5 was determined from nanoindentation testing. The value of Young's modulus was 35.4 Β± 4.3 GPa. This value is approximately one-half of the predicted value based on density functional theory calculations. This difference was not a result of the testing procedure or microstructural variables.

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