Electrochemical characterization of orthorhombic Na{sub x}MnO{sub 2} for alkali metal polymer batteries

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Electrochemical potential spectroscopy (ECPS) has been used successfully to observe and explain ordering transitions in orthorhombic Na{sub x}MnO{sub 2} as it is discharged in a sodium/polymer cell. Features can be assigned on the basis of sequential filling of sites in the small and then the large tunnels of the structure as the reduction progresses. Intercalation of lithium into Na{sub x}MnO{sub 2} may be less straightforward than that of sodium, and is worthy of investigation by ECPS. Li/Na{sub x}MnO{sub 2} cells have a greater discharge capacity than Na/Na{sub x}MnO{sub 2} cells, suggesting that more than four lithiums per large tunnel can ... continued below

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9 p.

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Doeff, M.M.; Ding, Lie & DeJonghe, L.C. April 1, 1995.

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Description

Electrochemical potential spectroscopy (ECPS) has been used successfully to observe and explain ordering transitions in orthorhombic Na{sub x}MnO{sub 2} as it is discharged in a sodium/polymer cell. Features can be assigned on the basis of sequential filling of sites in the small and then the large tunnels of the structure as the reduction progresses. Intercalation of lithium into Na{sub x}MnO{sub 2} may be less straightforward than that of sodium, and is worthy of investigation by ECPS. Li/Na{sub x}MnO{sub 2} cells have a greater discharge capacity than Na/Na{sub x}MnO{sub 2} cells, suggesting that more than four lithiums per large tunnel can be inserted. (It is also possible, but less likely that more than one lithium can be placed inside the small tunnels.) This implies that the sites for lithium occupancy might be somewhat different than that for sodium. Further investigation into the properties of orthorhombic Na{sub x}MnO{sub 2} and its utility as a positive electrode for rechargeable sodium and lithium cells is presently underway in this laboratory.

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9 p.

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OSTI as DE95012369

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  • Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 17-21 Apr 1995

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  • Other: DE95012369
  • Report No.: LBL--37071
  • Report No.: CONF-950412--11
  • Grant Number: AC03-76SF00098
  • Office of Scientific & Technical Information Report Number: 69328
  • Archival Resource Key: ark:/67531/metadc703384

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  • April 1, 1995

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 4, 2016, 9:19 p.m.

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Doeff, M.M.; Ding, Lie & DeJonghe, L.C. Electrochemical characterization of orthorhombic Na{sub x}MnO{sub 2} for alkali metal polymer batteries, article, April 1, 1995; California. (digital.library.unt.edu/ark:/67531/metadc703384/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.