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X-ray Absorption Spectroscopy Investigation of the Sub-Nanoscale Strain in Thin-Film Lithium Ion Battery Cathodes

Published online by Cambridge University Press:  03 September 2012

Faisal M. Alamgir ,
Jason Vansluytman ,
Daniel Carter ,
Jay Whitacre ,
Chi-Chang Kao ,
Steve Greenbaum  and
Marten Denboer
Faisal M. Alamgir
Affiliation:
Physics and Astronomy Department, Hunter College of the City of New YorkNew York, NY 10021, U.S.A. National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY
Jason Vansluytman
Affiliation:
Physics and Astronomy Department, Hunter College of the City of New YorkNew York, NY 10021, U.S.A.
Daniel Carter
Affiliation:
Physics and Astronomy Department, Hunter College of the City of New YorkNew York, NY 10021, U.S.A.
Jay Whitacre
Affiliation:
Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA
Chi-Chang Kao
Affiliation:
National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY
Steve Greenbaum
Affiliation:
Physics and Astronomy Department, Hunter College of the City of New YorkNew York, NY 10021, U.S.A.
Marten Denboer
Affiliation:
Physics and Astronomy Department, Hunter College of the City of New YorkNew York, NY 10021, U.S.A.
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Abstract

LiCoO2 and LiNiO2, two important cathode materials for Li-ion batteries, were studied in their respective bulk and thin-film form. X-ray absorption spectroscopy (XAS) has been used to probe the local atomic structure and structural defects in the thin-film and bulk cathodes. Results comparing Li(Co,Ni)O2 in the bulk and thin-film forms suggests a correlation between intrinsic stress and local strain in the thin-film. This local strain is manifested by a collapse of the six-fold rotational symmetry within the metal-metal layer of the Li(Co,Ni)O2 system into a two fold one. The relationship between annealing conditions and the resulting local strain in these films is examined.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 822: Symposium S – Nanostructured Materials in Alternative Energy Devices , 2004 , S2.3
Copyright
Copyright © Materials Research Society 2004

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