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Mechanical analysis and in situ structural and morphological evaluation of Ni-Sn alloy anodes for Li ion batteries

Lookup NU author(s): Dr Jinju Chen, Professor Steve BullORCiD, Professor Sudipta Roy

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Abstract

In lithium ion batteries, it has previously been shown that Ni-Sn thin film anodes containing 62 at.% Sn show outstanding electrochemical characteristics, e.g. good capacity and endurance, during charge-discharge cycling. However, their mechanical response, which is likely related to their lifetime in service, has so far received relatively little attention. To address this, nanoindentation and nanowear techniques have been used to characterize the mechanical properties of thin Ni-Sn films electrodeposited on a copper substrate. In situ morphology analysis together with in situ stress measurement has been performed to assess the properties of Ni-Sn thin film anodes during electrochemical cycling. The change in mechanical properties, residual stress and fracture behaviour of the anodes is related to the phase changes which occur during charge-discharge cycling. The correlation between the mechanical properties of the films and their charge-discharge characteristics serves as a useful indicator for optimized design of a Sn-based intermetallic anode film for lithium ion secondary batteries. © 2008 IOP Publishing Ltd.

Publication metadata

Author(s): Chen J, Bull SJ, Roy S, Mukaibo H, Nara H, Momma T, Osaka T, Shacham-Diamand Y

Publication type: Article

Publication status: Published

Journal: Journal of Physics D: Applied Physics

Year: 2008

Volume: 41

Issue: 2

ISSN (print): 0022-3727

ISSN (electronic): 1361-6463

Publisher: Institute of Physics Publishing Ltd.

URL: http://dx.doi.org/10.1088/0022-3727/41/2/025302

DOI: 10.1088/0022-3727/41/2/025302

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