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Title: Electrochemical cell

An electrochemical cell 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.degree. 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.
Inventors:
 [1];  [2];  [1]
  1. (Downers Grove, IL)
  2. (Naperville, IL)
Issue Date:
OSTI Identifier:
869143
Assignee:
University of Chicago (Chicago, IL) ANL
Patent Number(s):
US 5283135
Contract Number:
W-31109-ENG-38
Research Org:
Argonne National Laboratory (ANL), Argonne, IL
Country of Publication:
United States
Language:
English
Subject:
electrochemical; cell; bimodal; positive; electrode; negative; alkali; metal; compatible; electrolyte; including; salt; molten; operating; temperature; electrochemically; active; layer; transition; chloride; partially; charging; product; additives; bromide; iodide; sulfur; volumetric; capacity; excess; 400; ah; cm; 90; recharged; hours; operate; temperatures; below; 160; degree; disclosed; method; reducing; improving; overall; producing; times; 10; temperatures below; metal chloride; positive electrode; negative electrode; alkali metal; electrochemical cell; transition metal; metal salt; operating temperature; active layer; electrolyte including; electrochemically active; cell operating; salt molten; chemically active; compatible electrolyte; bimodal positive; /429/