Separator-integrated electrode plate and capacitor element
A separator-integrated electrode plate includes a current collecting sheet; an active material layer provided on the current collecting sheet, and a separator layer provided on the active material layer and configured to allow ions in electrolyte to pass through. The separator layer includes a polyimide layer provided on the active material layer and made of polyimide that has been melted in a solvent and then deposited as a film, and a polyolefin particle layer provided on the polyimide layer and made of polyolefin resin particles accumulated on the polyimide layer, the polyolefin resin particles having a melting point of 140° C. or less.
1. A separator-integrated electrode plate comprising:
a current collecting sheet;
an active material layer provided on the current collecting sheet; and
a separator layer provided on the active material layer and configured to allow ions contained in electrolyte to permeate through the separator layer,
wherein the separator layer is formed of:
a polyimide resin layer, which is a film of a polyimide resin deposited directly on the active material layer, the film being obtained by applying a solution of the polyimide resin and a solvent directly onto the active material layer and then drying the solution; and
a polyolefin particle layer, which is a layer of polyolefin resin particles accumulated directly on the polyimide resin layer, the polyolefin resin particles having a melting point of 140° C. or less.
2. The separator-integrated electrode plate according to claim 1 , wherein the polyimide resin layer has a thickness of 10.0 μm or less.
3. The separator-integrated electrode plate according to claim 2 , wherein the polyimide resin layer has a thickness of 6.0 μm or less.
4. The separator-integrated electrode plate according to claim 3 , wherein the polyimide resin layer has a thickness of 0.5 μm or more.
5. The separator-integrated electrode plate according to claim 4 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.
6. A capacitor device comprising:
a battery case;
an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 4 ; and
an electrolyte impregnated in the electrode body.
7. The separator-integrated electrode plate according to claim 3 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.
8. A capacitor device comprising:
a battery case;
an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 3 ; and
an electrolyte impregnated in the electrode body.
9. The separator-integrated electrode plate according to claim 2 , wherein the polyimide resin layer has a thickness of 0.5 μm or more.
10. The separator-integrated electrode plate according to claim 9 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.
11. A capacitor device comprising:
a battery case;
an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 9 ; and
an electrolyte impregnated in the electrode body.
12. The separator-integrated electrode plate according to claim 2 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.
13. A capacitor device comprising:
a battery case;
an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 12 ; and
an electrolyte impregnated in the electrode body.
14. A capacitor device comprising:
a battery case;
an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 2 ; and
an electrolyte impregnated in the electrode body.
15. The separator-integrated electrode plate according to claim 1 , wherein the polyimide resin layer has a thickness of 0.5 μm or more.
16. The separator-integrated electrode plate according to claim 15 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.
17. A capacitor device comprising:
a battery case;
an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 15 ; and
an electrolyte impregnated in the electrode body.
18. The separator-integrated electrode plate according to claim 1 , wherein the polyolefin particle layer has a thickness falling within a range of 10 μm to 25 μm.
19. A capacitor device comprising:
a battery case;
an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 18 ; and
an electrolyte impregnated in the electrode body.
20. A capacitor device comprising:
a battery case;
an electrode body accommodated in the battery case, the electrode body including the separator-integrated electrode plate set forth in claim 1 ; and
an electrolyte impregnated in the electrode body.