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Title: Overdischarge protection in high-temperature cells and batteries

Abstract

Overdischarge indication and protection is provided in a lithium alloy - metal sulfide, secondary electrochemical cell and batteries of such cells through use of a low lithium activity phase that ordinarily is not matched with positive electrode material. Low lithium activity phases such as Li.sub.0.1 Al.sub.0.9 and LiAlSi in correspondence with positive electrode material cause a downward gradient in cell voltage as an indication of overdischarge prior to damage to the cell. Moreover, the low lithium activity phase contributes lithium into the electrolyte and provides a lithium shuttling current as overdischarge protection after all of the positive electrode material is discharged.

Inventors:
 [1]
  1. (Downers Grove, IL)
Issue Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL
OSTI Identifier:
867427
Patent Number(s):
4935316
Assignee:
United States of America as represented by United States (Washington, DC) ANL
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
overdischarge; protection; high-temperature; cells; batteries; indication; provided; lithium; alloy; metal; sulfide; secondary; electrochemical; cell; activity; phase; ordinarily; matched; positive; electrode; material; phases; lialsi; correspondence; downward; gradient; voltage; prior; damage; moreover; contributes; electrolyte; provides; shuttling; current; discharged; cell voltage; metal sulfide; secondary electrochemical; positive electrode; electrochemical cell; electrode material; lithium alloy; high-temperature cells; charge prior; temperature cells; /429/

Citation Formats

Redey, Laszlo. Overdischarge protection in high-temperature cells and batteries. United States: N. p., 1990. Web.
Redey, Laszlo. Overdischarge protection in high-temperature cells and batteries. United States.
Redey, Laszlo. Mon . "Overdischarge protection in high-temperature cells and batteries". United States. https://www.osti.gov/servlets/purl/867427.
@article{osti_867427,
title = {Overdischarge protection in high-temperature cells and batteries},
author = {Redey, Laszlo},
abstractNote = {Overdischarge indication and protection is provided in a lithium alloy - metal sulfide, secondary electrochemical cell and batteries of such cells through use of a low lithium activity phase that ordinarily is not matched with positive electrode material. Low lithium activity phases such as Li.sub.0.1 Al.sub.0.9 and LiAlSi in correspondence with positive electrode material cause a downward gradient in cell voltage as an indication of overdischarge prior to damage to the cell. Moreover, the low lithium activity phase contributes lithium into the electrolyte and provides a lithium shuttling current as overdischarge protection after all of the positive electrode material is discharged.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}

Patent:

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