Method of preparing porous, rigid ceramic separators for an electrochemical cell

Patent · Thu Jan 01 00:00:00 EST 1981

OSTI ID:863773

Bandyopadhyay, Gautam ^[1]; Dusek, Joseph T ^[2]

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1. Naperville, IL
2. Downers Grove, IL

Porous, rigid separators for electrochemical cells are prepared by first calcining particles of ceramic material at temperatures above about 1200.degree. C. for a sufficient period of time to reduce the sinterability of the particles. A ceramic powder that has not been calcined is blended with the original powder to control the porosity of the completed separator. The ceramic blend is then pressed into a sheet of the desired shape and sintered at a temperature somewhat lower than the calcination temperature. Separator sheets of about 1 to 2.5 mm thickness and 30 to 70% porosity can be prepared by this technique. Ceramics such as yttria, magnesium oxide and magnesium-aluminum oxide have advantageously been used to form separators by this method.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• Assignee: United States of America as represented by United (Washington, DC)
• Patent Number(s): US 4244898
• OSTI ID: 863773
• Country of Publication: United States
• Language: English

Related Subjects

method
preparing
porous
rigid
ceramic
separators
electrochemical
cell
cells
prepared
calcining
particles
material
temperatures
1200
degree
sufficient
period
time
reduce
sinterability
powder
calcined
blended
original
control
porosity
completed
separator
blend
pressed
sheet
desired
shape
sintered
temperature
somewhat
calcination
sheets
thickness
30
70
technique
ceramics
yttria
magnesium
oxide
magnesium-aluminum
advantageously
form
ceramic powder
ceramic material
aluminum oxide
electrochemical cells
electrochemical cell
magnesium oxide
desired shape
sufficient period
preparing porous
ceramic mater
/264/501/