Process of manufacturing porous separator for electrochemical power supply
AssigneeImra America, Inc.
InventorFrank M. Delnick
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Abstract
A method of forming a porous composite separator layer for an electrochemical cell comprising the steps of printing a thin layer of a separator precursor solution on the surface of one of the electrochemical cell electrodes, drying and curing the thin layer of separator precursor solution so that it transforms into a microporous composite separator structure. In the preferred embodiment, the separator precursor solution is formulated as an ink comprising a silica aerogel filler material dispersed in a solution of polymer binder which is dissolved in a suitable solvent. The process allows the manufacture of thin and flexible composite separators which are conformally bonded to the underlying electrodes.
Claims20
A process for fabricating a porous composite separator for an electrochemical cell which includes an electrode, comprising the steps of:
- disposing a solution of separator precursor on said electrode;
- and
- transforming said solution of separator precursor so that said solution of separator precursor forms a porous composite separator that adheres to said electrode.
A process of forming a microporous separator for an electrochemical cell which includes an electrode, comprising:
- printing a continuous layer of said separator on said electrode;
- and
- drying said layer to form micropores therein.
A process of forming a microporous separator for an electrochemical cell which includes an electrode, comprising:
- conformally bonding a continuous layer of said separator on said electrode;
- and
- drying said layer to form micropores therein.
Dependencies are inferred from the claim text.