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Modeling Particle Size Effects on Phase Stability and Transition Pathways in Nanosized Olivine Cathode Particles

Published online by Cambridge University Press:  01 February 2011

Ming Tang ,
Hsiao-Ying Huang ,
Nonglak Meethong ,
Yu-Hua Kao ,
W. Craig Carter  and
Yet-Ming Chiang
Ming Tang
Affiliation:
mingtang@mit.edu, Massachusetts Institute of Technology, Department of Materials Science and Enginnering, 77 Massachusetts Avenue, Cambridge, MA, 02139, United States
Hsiao-Ying Huang
Affiliation:
hshuang@MIT.EDU, Massachusetts Institute of Technology, Department of Materials Science and Engineering, Cambridge, MA, 02139, United States
Nonglak Meethong
Affiliation:
nmpuye@MIT.EDU, Massachusetts Institute of Technology, Department of Materials Science and Engineering, Cambridge, MA, 02139, United States
Yu-Hua Kao
Affiliation:
yhkao@MIT.EDU, Massachusetts Institute of Technology, Department of Materials Science and Engineering, Cambridge, MA, 02139, United States
W. Craig Carter
Affiliation:
ccarter@mit.edu, Massachusetts Institute of Technology, Department of Materials Science and Engineering, Cambridge, MA, 02139, United States
Yet-Ming Chiang
Affiliation:
ychiang@mit.edu, Massachusetts Institute of Technology, Department of Materials Science and Engineering, Cambridge, MA, 02139, United States
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Abstract

Recent experiments show that nanosized olivine LiFePO4 has different phase transition and solubility behavior than that of larger cathode particles. The possibility of metastable or globally stable amorphous phase in nanosized LiFePO4 particles during delithiation is considered in a diffuse-interface model. At a small enough particle size, a lithiated crystalline phase can undergo amorphization upon charging instead of transforming directly to the delithiated crystalline phase at nanoscale particle sizes.

Keywords

phase transformationnanoscaleamorphous
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1100: Symposium JJ – Materials Research for Electrical Energy Storage , 2008 , 1100-JJ03-04
Copyright
Copyright © Materials Research Society 2008

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