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Title: Re-evaluation of the eutectic region of the LiBr-KBr-LiF system

Abstract

The separator pellet in a thermal battery consists of electrolyte immobilized by a binder (typically, MgO powder). The melting point of the electrolyte determines the effective operating window for its use in a thermal battery. The development of a two-hour thermal battery required the use of a molten salt that had a lower melting point and larger liquidus range than the LiCl-KCl eutectic which melts at 352 C. Several candidate eutectic electrolyte systems were evaluated for their suitability for this application. One was the LiCl-LiBr-KBr eutectic used at Argonne National Laboratories for high-temperature rechargeable batteries for electric-vehicle applications. Using a custom-designed high-temperature conductivity cell, the authors were able to readily determine the liquidus region for the various compositions studied around the original eutectic for the LiBr-KBr-LiF system. The actual eutectic composition was found to be 60.0 m/o LiBr-37.5 m/o KBr-2.5 m/o LiF with a melting point of 324 {+-} 0.5 C.

Authors:
 [1];  [2]
  1. Argonne National Lab., IL (United States)
  2. Sandia National Labs., Albuquerque, NM (United States)
Publication Date:
Research Org.:
Argonne National Lab., IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
238472
Report Number(s):
SAND-96-0979C; CONF-9606161-5
ON: DE96010859; TRN: AHC29612%%21
DOE Contract Number:
AC04-94AL85000
Resource Type:
Technical Report
Resource Relation:
Conference: 37. power sources conference, Cherry Hill, NJ (United States), 17-20 Jun 1996; Other Information: PBD: [1996]
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; THERMAL BATTERIES; ELECTROLYTES; LITHIUM BROMIDES; PHASE STUDIES; THERMODYNAMIC PROPERTIES; POTASSIUM BROMIDES; LITHIUM FLUORIDES; EUTECTICS; PHASE TRANSFORMATIONS; CHEMICAL COMPOSITION; MELTING POINTS; ELECTRIC CONDUCTIVITY; PHASE DIAGRAMS; MOISTURE; EXPERIMENTAL DATA

Citation Formats

Redey, L., and Guidotti, R.A. Re-evaluation of the eutectic region of the LiBr-KBr-LiF system. United States: N. p., 1996. Web. doi:10.2172/238472.
Redey, L., & Guidotti, R.A. Re-evaluation of the eutectic region of the LiBr-KBr-LiF system. United States. doi:10.2172/238472.
Redey, L., and Guidotti, R.A. Wed . "Re-evaluation of the eutectic region of the LiBr-KBr-LiF system". United States. doi:10.2172/238472. https://www.osti.gov/servlets/purl/238472.
@article{osti_238472,
title = {Re-evaluation of the eutectic region of the LiBr-KBr-LiF system},
author = {Redey, L. and Guidotti, R.A.},
abstractNote = {The separator pellet in a thermal battery consists of electrolyte immobilized by a binder (typically, MgO powder). The melting point of the electrolyte determines the effective operating window for its use in a thermal battery. The development of a two-hour thermal battery required the use of a molten salt that had a lower melting point and larger liquidus range than the LiCl-KCl eutectic which melts at 352 C. Several candidate eutectic electrolyte systems were evaluated for their suitability for this application. One was the LiCl-LiBr-KBr eutectic used at Argonne National Laboratories for high-temperature rechargeable batteries for electric-vehicle applications. Using a custom-designed high-temperature conductivity cell, the authors were able to readily determine the liquidus region for the various compositions studied around the original eutectic for the LiBr-KBr-LiF system. The actual eutectic composition was found to be 60.0 m/o LiBr-37.5 m/o KBr-2.5 m/o LiF with a melting point of 324 {+-} 0.5 C.},
doi = {10.2172/238472},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed May 01 00:00:00 EDT 1996},
month = {Wed May 01 00:00:00 EDT 1996}
}

Technical Report:

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