Method for uniformly distributing carbon flakes in a positive electrode, the electrode made thereby and compositions

Patent · Sat Jan 01 04:00:00 EST 1983

OSTI ID:864459

Mrazek, Franklin C ^[1]; Smaga, John A ^[2]; Battles, James E ^[3]

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1. Hickory Hills, IL
2. Lemont, IL
3. Oak Forest, IL

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.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4367159
• OSTI ID: 864459
• Country of Publication: United States
• Language: English

Related Subjects

/252/75/429/
alkali
alkali metal
alkaline
alkaline earth
alloy
alloying
capable
carbon
cast
cast iron
cell
collector
compositions
compositions useful
conductive
connected
contact
containing
conversion
convert
current
current collector
described
disclosed
distribute
distributing
earth
earth metal
electrical
electrical contact
electrical potential
electrically
electrically conductive
electrochemical
electrochemical cell
electrochemically
electrode
electrode containing
electrode structure
electrodes
electrolyte
electrolyte including
flakes
formed
formerly
forming
graphite
graphite flakes
gray
halides
including
iron
iron sulfide
material
material capable
metal
metal alloy
metal halide
metal halides
metal sulfide
method
mixture
negative
negative electrode
particulate
particulate mixture
positive
positive electrode
positive electrodes
potential
preparing
secondary
secondary electrochemical
source
structure
suitable
sulfide
throughout
transition
transition metal
type
type described
uniformly
uniformly distributing
useful