Overcharge tolerant high-temperature cells and batteries
Abstract
In a lithium-alloy/metal sulfide high temperature electrochemical cell, cell damage caused by overcharging is avoided by providing excess lithium in a high-lithium solubility phase alloy in the negative electrode and a specified ratio maximum of the capacity of a matrix metal of the negative electrode in the working phase to the capacity of a transition metal of the positive electrode. In charging the cell, or a plurality of such cells in series and/or parallel, chemical transfer of elemental lithium from the negative electrode through the electrolyte to the positive electrode provides sufficient lithium to support an increased self-charge current to avoid anodic dissolution of the positive electrode components above a critical potential. The lithium is subsequently electrochemically transferred back to the negative electrode in an electrochemical/chemical cycle which maintains high self-discharge currents on the order of 3-15 mA/cm.sup.2 in the cell to prevent overcharging.
- Inventors:
-
- Downers Grove, IL
- Wheaton, IL
- Issue Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- OSTI Identifier:
- 867044
- Patent Number(s):
- 4849309
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- DOE Contract Number:
- W-31109-ENG-38
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- overcharge; tolerant; high-temperature; cells; batteries; lithium-alloy; metal; sulfide; temperature; electrochemical; cell; damage; caused; overcharging; avoided; providing; excess; lithium; high-lithium; solubility; phase; alloy; negative; electrode; specified; ratio; maximum; capacity; matrix; transition; positive; charging; plurality; series; parallel; chemical; transfer; elemental; electrolyte; provides; sufficient; support; increased; self-charge; current; avoid; anodic; dissolution; components; critical; potential; subsequently; electrochemically; transferred; cycle; maintains; self-discharge; currents; 3-15; cm; prevent; temperature electrochemical; anodic dissolution; discharge current; provides sufficient; metal sulfide; positive electrode; negative electrode; electrochemical cell; transition metal; damage caused; chemical cycle; phase alloy; electrode provides; high-temperature cells; charge current; cell damage; excess lithium; temperature cells; discharge currents; /429/
Citation Formats
Redey, Laszlo, and Nelson, Paul A. Overcharge tolerant high-temperature cells and batteries. United States: N. p., 1989.
Web.
Redey, Laszlo, & Nelson, Paul A. Overcharge tolerant high-temperature cells and batteries. United States.
Redey, Laszlo, and Nelson, Paul A. Sun .
"Overcharge tolerant high-temperature cells and batteries". United States. https://www.osti.gov/servlets/purl/867044.
@article{osti_867044,
title = {Overcharge tolerant high-temperature cells and batteries},
author = {Redey, Laszlo and Nelson, Paul A},
abstractNote = {In a lithium-alloy/metal sulfide high temperature electrochemical cell, cell damage caused by overcharging is avoided by providing excess lithium in a high-lithium solubility phase alloy in the negative electrode and a specified ratio maximum of the capacity of a matrix metal of the negative electrode in the working phase to the capacity of a transition metal of the positive electrode. In charging the cell, or a plurality of such cells in series and/or parallel, chemical transfer of elemental lithium from the negative electrode through the electrolyte to the positive electrode provides sufficient lithium to support an increased self-charge current to avoid anodic dissolution of the positive electrode components above a critical potential. The lithium is subsequently electrochemically transferred back to the negative electrode in an electrochemical/chemical cycle which maintains high self-discharge currents on the order of 3-15 mA/cm.sup.2 in the cell to prevent overcharging.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 1989},
month = {Sun Jan 01 00:00:00 EST 1989}
}