Chemistry: electrical current producing apparatus – product – and – Fluid active material or two-fluid electrolyte combination... – Active material in molten state
Patent
1989-12-21
1991-02-12
Kalafut, Stephen J.
Chemistry: electrical current producing apparatus, product, and
Fluid active material or two-fluid electrolyte combination...
Active material in molten state
204 21, 296231, H01M 1044
Patent
active
049923455
ABSTRACT:
A method of making an electrochemical cell comprises loading into a cathode compartment of a cell housing comprising an anode compartment separated from a cathode compartment by a separator which is a solid conductor of ions of alkali metal M or is a micromolecular sieve which contains alkali metal M sorbed therein, an alkali metal aluminium halide molten salt electrolyte having the formula MAlHal.sub.4 wherein M is the alkali metal of the separator and Hal is a halide; an alkali metal halide MHal wherein M and Hal are respectively an alkali metal and a halide; a transition metal T selected from the group comprising Fe, Ni, Co, Cr, Mn and mixtures thereof, as an active cathode substance; and a current collector comprising at least one of copper, a copper-based substance, and a copper-coated substance, thereby to make an electrochemical cell precursor. The precursor is charged at a temperature at which the molten salt electrolyte and alkali metal M are molten, thereby halogenating the active cathode substance, with alkali metal M being produced and passing through the separator into the anode compartment.
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Boxall et al., "Electrochemical Studies on Ag, Fe, and Cu Species in AlCl.sub.3 -NaCl Melts", J. Electrochem. Soc.: Electrochemical Science and Technology, Feb. 1974, pp. 212 to 219.
Adendorff Keith T.
Coetzer Johan
Meintjes Anthony A.
Kalafut Stephen J.
Lilliwyte Societe Anonyme
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