Method of enhancing the wettability of boron nitride for use as an electrochemical cell separator
A felt or other fabric of boron nitride suitable for use as an interelectrode separator within an electrochemical cell is wetted with a solution containing a thermally decomposable organic salt of an alkaline earth metal. An aqueous solution of magnesium acetate is the preferred solution for this purpose. After wetting the boron nitride, the solution is dried by heating at a sufficiently low temperature to prevent rapid boiling and the creation of voids within the separator. The dried material is then calcined at an elevated temperature in excess of 400/sup 0/C to provide a coating of an oxide of magnesium on the surface of the boron nitride fibers. A fabric or felt of boron nitride treated in this manner is easily wetted by molten electrolytic salts, such as the alkali metal halides or alkaline earth metal halides, that are used in high temperature, secondary electrochemical cells.
- DOE Contract Number:
- W-31-109-ENG-38
- Assignee:
- Dept. of Energy
- Application Number:
- ON: DE82004467
- OSTI ID:
- 5192671
- Resource Relation:
- Other Information: Portions of document are illegible
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BATTERY SEPARATORS
WETTABILITY
BORON NITRIDES
ACETATES
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
CALCINATION
CHEMICAL PREPARATION
DRYING
ELECTROCHEMICAL CELLS
HALIDES
MAGNESIUM COMPOUNDS
BORON COMPOUNDS
CARBOXYLIC ACID SALTS
CHEMICAL REACTIONS
DECOMPOSITION
DISPERSIONS
HALOGEN COMPOUNDS
MIXTURES
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
PYROLYSIS
SOLUTIONS
SYNTHESIS
THERMOCHEMICAL PROCESSES
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries