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Title: Electrochemical cell

Abstract

An electrochemical cell is described having a bimodal positive electrode, a negative electrode of an alkali metal, and a compatible electrolyte including an alkali metal salt molten at the cell operating temperature. The positive electrode has an electrochemically active layer of at least one transition metal chloride at least partially present as a charging product, and additives of bromide and/or iodide and sulfur in the positive electrode or the electrolyte. Electrode volumetric capacity is in excess of 400 Ah/cm[sup 3]; the cell can be 90% recharged in three hours and can operate at temperatures below 160 C. There is also disclosed a method of reducing the operating temperature and improving the overall volumetric capacity of an electrochemical cell and for producing a positive electrode having a BET area greater than 6[times]10[sup 4] cm[sup 2]/g of Ni. 8 figures.

Inventors:
; ;
Issue Date:
OSTI Identifier:
5285899
Patent Number(s):
5283135 A
Application Number:
PPN: US 7-901547
Assignee:
Univ. of Chicago, IL () PTO; EDB-94-063476
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Patent File Date: 19 Jun 1992
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION; MOLTEN CARBONATE FUEL CELLS; DESIGN; ALKALI METAL COMPOUNDS; ELECTRIC CONDUCTIVITY; SURFACE AREA; TRANSITION ELEMENT COMPOUNDS; DIRECT ENERGY CONVERTERS; ELECTRICAL PROPERTIES; ELECTROCHEMICAL CELLS; FUEL CELLS; HIGH-TEMPERATURE FUEL CELLS; PHYSICAL PROPERTIES; SURFACE PROPERTIES; 300501* - Fuel Cells- Design & Development

Citation Formats

Redey, L.I., Vissers, D.R., and Prakash, J. Electrochemical cell. United States: N. p., 1994. Web.
Redey, L.I., Vissers, D.R., & Prakash, J. Electrochemical cell. United States.
Redey, L.I., Vissers, D.R., and Prakash, J. Tue . "Electrochemical cell". United States.
@article{osti_5285899,
title = {Electrochemical cell},
author = {Redey, L.I. and Vissers, D.R. and Prakash, J.},
abstractNote = {An electrochemical cell is described having a bimodal positive electrode, a negative electrode of an alkali metal, and a compatible electrolyte including an alkali metal salt molten at the cell operating temperature. The positive electrode has an electrochemically active layer of at least one transition metal chloride at least partially present as a charging product, and additives of bromide and/or iodide and sulfur in the positive electrode or the electrolyte. Electrode volumetric capacity is in excess of 400 Ah/cm[sup 3]; the cell can be 90% recharged in three hours and can operate at temperatures below 160 C. There is also disclosed a method of reducing the operating temperature and improving the overall volumetric capacity of an electrochemical cell and for producing a positive electrode having a BET area greater than 6[times]10[sup 4] cm[sup 2]/g of Ni. 8 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {2}
}