Visualization of Charge Distribution in a Lithium Battery Electrode

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We describe a method for direct determination and visualization of the distribution of charge in a composite electrode. Using synchrotron X-ray microdiffraction, state-of-charge profiles in-plane and normal to the current collector were measured. In electrodes charged at high rate, the signatures of nonuniform current distribution were evident. The portion of a prismatic cell electrode closest to the current collector tab had the highest state of charge due to electronic resistance in the composite electrode and supporting foil. In a coin cell electrode, the active material at the electrode surface was more fully charged than that close to the current collector ... continued below

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Liu, Jun; Kunz, Martin; Chen, Kai; Tamura, Nobumichi & Richardson, Thomas J. July 2, 2010.

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We describe a method for direct determination and visualization of the distribution of charge in a composite electrode. Using synchrotron X-ray microdiffraction, state-of-charge profiles in-plane and normal to the current collector were measured. In electrodes charged at high rate, the signatures of nonuniform current distribution were evident. The portion of a prismatic cell electrode closest to the current collector tab had the highest state of charge due to electronic resistance in the composite electrode and supporting foil. In a coin cell electrode, the active material at the electrode surface was more fully charged than that close to the current collector because the limiting factor in this case is ion conduction in the electrolyte contained within the porous electrode.

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  • Journal Name: The Journal of Physical Chemistry Letters; Journal Volume: 1; Related Information: Journal Publication Date: 06/25/2010

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  • Report No.: LBNL-3629E
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1021/jz100634n | External Link
  • Office of Scientific & Technical Information Report Number: 985245
  • Archival Resource Key: ark:/67531/metadc1014157

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  • July 2, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Oct. 18, 2017, 12:54 p.m.

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Liu, Jun; Kunz, Martin; Chen, Kai; Tamura, Nobumichi & Richardson, Thomas J. Visualization of Charge Distribution in a Lithium Battery Electrode, article, July 2, 2010; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc1014157/: accessed December 14, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.