Separator, electrode element, electric energy storage device and method for producing separator
AssigneeNEC Corporation
InventorsKenichi Shimura, Kazuhiko Inoue
Life of this patent
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Abstract
The present invention provides a separator drastically reducing the short-circuit between electrodes and having satisfactory ionic conductivity on the basis of the use of inorganic materials. The separator 23 has a substrate 23a including a layer formed by using an inorganic material so as to have a plurality of openings, and an inorganic fiber layer 23b laminated on one surface or both surfaces of the substrate 23a so as to cover the openings of the substrate 23a without blocking the openings of the substrate 23a. The thickness of the separator 23 is 100 μm or less.
Claims14
A separator for an electrode element having a positive electrode and a negative electrode disposed so as to face each other, the separator comprising:
- a substrate including at least a layer formed by using an inorganic material so as to have a plurality of openings;
- and
- an inorganic fiber layer laminated on one surface or both surfaces of the substrate so as to cover the openings without blocking the openings, wherein the inorganic fiber layer is fixed to the substrate by a binder which is impregnated into the inorganic fiber layer,
- wherein the thickness of an entirety of the separator is 100 μm or less.
A method for producing a separator for an electrode element having a positive electrode and a negative electrode disposed so as to face each other, the production method comprising:
- preparing a substrate including at least a layer formed by using an inorganic material so as to have a plurality of openings;
- and
- laminating an inorganic fiber layer on one surface or both surfaces of the substrate by fixing the inorganic fiber layer to the substrate with a binder which is impregnated into the inorganic fiber layer,
- wherein the thickness of the substrate and the thickness of the inorganic fiber layer are selected such that the thickness of an entirety of the separator is 100 μm or less.
Dependencies are inferred from the claim text.