5-Volt and 4.6 V plateaus in LiMn{sub 2}O{sub 4} thin films

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Additional plateaus with median voltages of {similar_to}4.6 V, and {similar_to}5 V have been observed on charging thin film lithium batteries with crystalline LiMn{sub 2}O{sub 4} cathodes to 5.3 V. Total charge extracted from the 4 V and the two additional plateaus corresponded to about 1Li/Mn{sub 2}O{sub 4}, but the distribution of capacity among the three plateaus varied from film to film. It is speculated that the additional plateaus result from formation of mixed spinel structures in which a fraction of the 8a sites areoccupied by Mn{sup 2+} or Mn{sup 4+} ions and a fraction of the Li{sup +} ions occupy ... continued below

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13 p.

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Bates, J.B.; Lubben, D.; Dudney, N.J.; Zuhr, R.A. & Hart, F.X. January 1, 1996.

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Description

Additional plateaus with median voltages of {similar_to}4.6 V, and {similar_to}5 V have been observed on charging thin film lithium batteries with crystalline LiMn{sub 2}O{sub 4} cathodes to 5.3 V. Total charge extracted from the 4 V and the two additional plateaus corresponded to about 1Li/Mn{sub 2}O{sub 4}, but the distribution of capacity among the three plateaus varied from film to film. It is speculated that the additional plateaus result from formation of mixed spinel structures in which a fraction of the 8a sites areoccupied by Mn{sup 2+} or Mn{sup 4+} ions and a fraction of the Li{sup +} ions occupy the 16d sites. After charging to 5.3 V, the 4.6 V plateau disappeared, and the capacity of the 4 V plateau increased at the expense of that of the 5 V plateau. The latter change is attributed to movement of Mn{sup 3+} or Mn{sup 5+} ions from 8a to 16d sites.

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13 p.

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OSTI as DE96008620

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  • 188. meeting of the Electrochemical Society, Chicago, IL (United States), 8-13 Oct 1995

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  • Other: DE96008620
  • Report No.: CONF-951007--21
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 211469
  • Archival Resource Key: ark:/67531/metadc672866

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  • January 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Jan. 15, 2016, 12:32 p.m.

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Bates, J.B.; Lubben, D.; Dudney, N.J.; Zuhr, R.A. & Hart, F.X. 5-Volt and 4.6 V plateaus in LiMn{sub 2}O{sub 4} thin films, article, January 1, 1996; Tennessee. (digital.library.unt.edu/ark:/67531/metadc672866/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.