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Title: Electrochemical cell

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. 6 figs.
Inventors:
; ;
Issue Date:
OSTI Identifier:
264560
Assignee:
PTO; SCA: 250901; PA: EDB-96:119553; SN: 96001625921
Patent Number(s):
US 5,536,593/A/
Application Number:
PAN: 8-211,554
Contract Number:
W-31109-ENG-38
Resource Relation:
Other Information: PBD: 16 Jul 1996
Research Org:
Univ. of Chicago, IL (United States)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; ELECTRIC BATTERIES; DESIGN; ELECTRODES; ALKALI METALS; MOLTEN SALTS; TRANSITION ELEMENT COMPOUNDS; CHLORIDES; BATTERY CHARGING; TEMPERATURE CONTROL; SURFACE AREA