Studies of Local Degradation Phenomena in Composite Cathodes forLithium-Ion Batteries

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{sup 13}C-carbon black substituted composite LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} cathodes were tested in model electrochemical cells to monitor qualitatively and quantitatively carbon additive(s) distribution changes within tested cells and establish possible links with other detrimental phenomena. Raman qualitative and semi-quantitative analysis of {sup 13}C in the cell components was carried out to trace the possible carbon rearrangement/movement in the cell. Small amounts of cathode carbon additives were found trapped in the separator, at the surface of Li-foil anode, in the electrolyte. The structure of the carried away carbon particles was highly amorphous unlike the original {sup 12}C graphite and ... continued below

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Kerlau, M.; Marcinek, M.; Srinivasan, V. & Kostecki, R.M. November 1, 2006.

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{sup 13}C-carbon black substituted composite LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2} cathodes were tested in model electrochemical cells to monitor qualitatively and quantitatively carbon additive(s) distribution changes within tested cells and establish possible links with other detrimental phenomena. Raman qualitative and semi-quantitative analysis of {sup 13}C in the cell components was carried out to trace the possible carbon rearrangement/movement in the cell. Small amounts of cathode carbon additives were found trapped in the separator, at the surface of Li-foil anode, in the electrolyte. The structure of the carried away carbon particles was highly amorphous unlike the original {sup 12}C graphite and {sup 13}C carbon black additives. The role of the carbon additive, the mechanism of carbon retreat in composite cathodes and its correlation with the increase of the cathode interfacial charge-transfer impedance, which accounts for the observed cell power and capacity loss is investigated and discussed.

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  • Journal Name: Electrochimica Acta; Journal Volume: 52; Journal Issue: 17; Related Information: Journal Publication Date: 05/2007

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  • Report No.: LBNL--62014
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 928578
  • Archival Resource Key: ark:/67531/metadc902351

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  • November 1, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • Sept. 29, 2016, 7:09 p.m.

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Kerlau, M.; Marcinek, M.; Srinivasan, V. & Kostecki, R.M. Studies of Local Degradation Phenomena in Composite Cathodes forLithium-Ion Batteries, article, November 1, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc902351/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.