TEM Study of Fracturing in Spherical and Plate-like LiFePO4Particles

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An investigation of fracturing in LiFePO{sub 4} particles as a function of the particle morphology and history is presented. Two types of samples, one subjected to electrochemical cycling and another to chemical delithiation are compared. We observe the formation of micro fractures parallel to low indexed lattice planes in both samples. The fracture surfaces are predominantly parallel to (100) planes in the chemically delithiated powder and (100) and (010) planes in the electrochemically cycled powder. A consideration of the threshold stresses for dislocation glide shows that particle geometry plays an important role in the observed behavior.

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Gabrisch, H.; Wilcox, J. & Doeff, M.M. December 20, 2007.

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An investigation of fracturing in LiFePO{sub 4} particles as a function of the particle morphology and history is presented. Two types of samples, one subjected to electrochemical cycling and another to chemical delithiation are compared. We observe the formation of micro fractures parallel to low indexed lattice planes in both samples. The fracture surfaces are predominantly parallel to (100) planes in the chemically delithiated powder and (100) and (010) planes in the electrochemically cycled powder. A consideration of the threshold stresses for dislocation glide shows that particle geometry plays an important role in the observed behavior.

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  • Journal Name: Electrochemical and Solid State Letters; Journal Volume: 11; Journal Issue: 3; Related Information: Journal Publication Date: 2008

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  • Report No.: LBNL--63783
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 923208
  • Archival Resource Key: ark:/67531/metadc894066

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  • December 20, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Sept. 30, 2016, 12:50 p.m.

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Gabrisch, H.; Wilcox, J. & Doeff, M.M. TEM Study of Fracturing in Spherical and Plate-like LiFePO4Particles, article, December 20, 2007; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc894066/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.