Electrochemical Evaluation of Thin-Film Li-Si Anodes Prepared by Plasma Spraying

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Thin-film electrodes of a plasma-sprayed Li-Si alloy were evaluated for use as anodes in high-temperature thermally activated (thermal) batteries. These anodes were prepared using 44% Li/56% Si (w/w) material as feed material in a special plasma-spray apparatus under helium or hydrogen, to protect this air- and moisture-sensitive material during deposition. Anodes were tested in single cells using conventional pressed-powder separators and lithiated pyrite cathodes at temperatures of 400 to 550 C at several different current densities. A limited number of 5-cell battery tests were also conducted. The data for the plasma-sprayed anodes was compared to that for conventional pressed-powder anodes. ... continued below

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10 p.

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GUIDOTTI,RONALD A.; REINHARDT,FREDERICK W. & SCHARRER,GREGORY L. September 8, 1999.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 12 times . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM, and Livermore, CA (United States)
    Place of Publication: Albuquerque, New Mexico

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Description

Thin-film electrodes of a plasma-sprayed Li-Si alloy were evaluated for use as anodes in high-temperature thermally activated (thermal) batteries. These anodes were prepared using 44% Li/56% Si (w/w) material as feed material in a special plasma-spray apparatus under helium or hydrogen, to protect this air- and moisture-sensitive material during deposition. Anodes were tested in single cells using conventional pressed-powder separators and lithiated pyrite cathodes at temperatures of 400 to 550 C at several different current densities. A limited number of 5-cell battery tests were also conducted. The data for the plasma-sprayed anodes was compared to that for conventional pressed-powder anodes. The performance of the plasma-sprayed anodes was inferior to that of conventional pressed-powder anodes, in that the cell emfs were lower (due to the lack of formation of the desired alloy phases) and the small porosity of these materials severely limited their rate capability. Consequently, plasma-sprayed Li-Si anodes would not be practical for use in thermal batteries.

Physical Description

10 p.

Notes

OSTI as DE00013983

Medium: P; Size: 10 pages

Source

  • 1999 Joint International Meeting (196th Meeting of the Electrochemical Society), Honolulu, HI (US), 10/17/1999--10/22/1999

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  • Report No.: SAND99-2263C
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 13983
  • Archival Resource Key: ark:/67531/metadc624396

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  • September 8, 1999

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  • June 16, 2015, 7:43 a.m.

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  • April 6, 2017, 6:46 p.m.

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GUIDOTTI,RONALD A.; REINHARDT,FREDERICK W. & SCHARRER,GREGORY L. Electrochemical Evaluation of Thin-Film Li-Si Anodes Prepared by Plasma Spraying, article, September 8, 1999; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc624396/: accessed September 25, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.