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Title: Method of preparing porous, rigid ceramic separators for an electrochemical cell. [Patent application]

Abstract

Porous, rigid separators for electrochemical cells are prepared by first calcining particles of ceramic material at temperatures above about 1200/sup 0/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-aluminium oxide have advantageously been used to form separators by this method.

Inventors:
;
OSTI Identifier:
5553106
Assignee:
TIC; ERA-05-022480; EDB-80-061289
DOE Contract Number:  
W-31-109-ENG-38
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; 36 MATERIALS SCIENCE; BATTERY SEPARATORS; FABRICATION; LITHIUM-SULFUR BATTERIES; YTTRIUM OXIDES; ALUMINIUM OXIDES; MAGNESIUM OXIDES; CALCINATION; HIGH TEMPERATURE; OFF-PEAK ENERGY STORAGE; POROUS MATERIALS; SINTERING; VERY HIGH TEMPERATURE; ALUMINIUM; LITHIUM; ZIRCONIUM OXIDES; ALKALI METALS; ALKALINE EARTH METAL COMPOUNDS; ALUMINIUM COMPOUNDS; CHALCOGENIDES; CHEMICAL REACTIONS; DECOMPOSITION; ELECTRIC BATTERIES; ELECTROCHEMICAL CELLS; ELEMENTS; ENERGY STORAGE; ENERGY STORAGE SYSTEMS; MAGNESIUM COMPOUNDS; MATERIALS; METAL-NONMETAL BATTERIES; METALS; OXIDES; OXYGEN COMPOUNDS; PYROLYSIS; STORAGE; THERMOCHEMICAL PROCESSES; TRANSITION ELEMENT COMPOUNDS; YTTRIUM COMPOUNDS; ZIRCONIUM COMPOUNDS; 250903* - Energy Storage- Batteries- Materials, Components, & Auxiliaries; 360201 - Ceramics, Cermets, & Refractories- Preparation & Fabrication

Citation Formats

Bandyopadhyay, G., and Dusek, J.T. Method of preparing porous, rigid ceramic separators for an electrochemical cell. [Patent application]. United States: N. p., Web.
Bandyopadhyay, G., & Dusek, J.T. Method of preparing porous, rigid ceramic separators for an electrochemical cell. [Patent application]. United States.
Bandyopadhyay, G., and Dusek, J.T. . "Method of preparing porous, rigid ceramic separators for an electrochemical cell. [Patent application]". United States.
@article{osti_5553106,
title = {Method of preparing porous, rigid ceramic separators for an electrochemical cell. [Patent application]},
author = {Bandyopadhyay, G. and Dusek, J.T.},
abstractNote = {Porous, rigid separators for electrochemical cells are prepared by first calcining particles of ceramic material at temperatures above about 1200/sup 0/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-aluminium oxide have advantageously been used to form separators by this method.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {},
month = {}
}