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

Abstract

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.

Authors:
; ;
Publication Date:
Research Org.:
Sandia National Labs., Albuquerque, NM (US); Sandia National Labs., Livermore, CA (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
13983
Report Number(s):
SAND99-2263C
TRN: AH200135%%570
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Conference
Resource Relation:
Conference: 1999 Joint International Meeting (196th Meeting of the Electrochemical Society), Honolulu, HI (US), 10/17/1999--10/22/1999; Other Information: PBD: 8 Sep 1999
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; ALLOYS; ANODES; CATHODES; DEPOSITION; ELECTRODES; EVALUATION; HELIUM; HYDROGEN; PERFORMANCE; PLASMA; POROSITY; PYRITE

Citation Formats

GUIDOTTI,RONALD A., REINHARDT,FREDERICK W., and SCHARRER,GREGORY L. Electrochemical Evaluation of Thin-Film Li-Si Anodes Prepared by Plasma Spraying. United States: N. p., 1999. Web.
GUIDOTTI,RONALD A., REINHARDT,FREDERICK W., & SCHARRER,GREGORY L. Electrochemical Evaluation of Thin-Film Li-Si Anodes Prepared by Plasma Spraying. United States.
GUIDOTTI,RONALD A., REINHARDT,FREDERICK W., and SCHARRER,GREGORY L. Wed . "Electrochemical Evaluation of Thin-Film Li-Si Anodes Prepared by Plasma Spraying". United States. https://www.osti.gov/servlets/purl/13983.
@article{osti_13983,
title = {Electrochemical Evaluation of Thin-Film Li-Si Anodes Prepared by Plasma Spraying},
author = {GUIDOTTI,RONALD A. and REINHARDT,FREDERICK W. and SCHARRER,GREGORY L.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {9}
}

Conference:
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