Method for uniformly distributing carbon flakes in a positive el

Details Method for uniformly distributing carbon flakes in a positive el Method for uniformly distributing carbon flakes in a positive el

1981-01-19

1983-01-04

Gluck, Irwin

Compositions

Compositions containing a single chemical reactant or plural...

429104, 429199, 429221, 75229, H01M 452, H01M 618

Patent

active

043671594

ABSTRACT:
A positive electrode for a secondary electrochemical cell wherein an electrically conductive current collector is in electrical contact with a particulate mixture of gray cast iron and an alkali metal sulfide and an electrolyte including alkali metal halides or alkaline earth metal halides. Also present may be a transition metal sulfide and graphite flakes from the conversion of gray cast iron to iron sulfide. Also disclosed is a method of distributing carbon flakes in a cell wherein there is formed an electrochemical cell of a positive electrode structure of the type described and a suitable electrolyte and a second electrode containing a material capable of alloying with alkali metal ions. The cell is connected to a source of electrical potential to electrochemically convert gray cast iron to an iron sulfide and uniformly to distribute carbon flakes formerly in the gray cast iron throughout the positive electrode while forming an alkali metal alloy in the negative electrode. Also disclosed are compositions useful in preparing positive electrodes.

REFERENCES:
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patent: 4086404 (1978-04-01), Vissers et al.
patent: 4158720 (1979-06-01), Kaun
Kaun et al., The Electrochemical Soc., Abstract, No. 39, Oct., 1977.
Borger et al., The Electrochemical Soc., Abstract, No. 46, Oct., 1977.

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