Film electrode, resin layer forming ink, inorganic layer forming ink, and electrode printing apparatus

1. An electrode, comprising:

an electrode base;

an active material layer formed on the electrode base; and

a polymer resin film layer adhering to at least one of a peripheral portion of the active material layer and a surface of the electrode base around the active material layer in a direction extending along a plane of the electrode base;

wherein the polymer resin film layer includes openings in the resin; and

wherein the openings are mesh-like microscopic openings;

wherein

the polymer resin film layer includes a nonporous insulating layer present on the active material layer and on the peripheral portion of the active material layer,

the polymer resin film layer includes a porous insulating layer that is formed on an entire upper portion of the active material layer and that differs from the nonporous insulating layer, and

except for a terminal portion of the electrode base, at least one side of an electrode peripheral portion has the following relationships (a) to (e):

(a) a length of the electrode base>a length of the active material layer,

(b) the length of the electrode base≤a length of an outer edge of the nonporous insulating layer,

(c) the length of the outer edge of the nonporous insulating layer≥length of the porous insulating layer,

(d) a length of an inner edge of the nonporous insulating layer<the length of the porous insulating layer, and

(e) the nonporous insulating layer has a contact portion at an end portion of the active material layer.

2. The electrode according to claim 1 , wherein ion permeability is achieved by adding a blowing agent to the resin; and heating the resin having the blowing agent after coating.

3. The electrode according to claim 1 , wherein ion permeability is achieved by adding a soluble salt to the resin, and immersing the resin having the soluble salt, after coating, in an electrolytic solution to dissolve the salt to form openings and pores.

4. The electrode according to claim 1 , wherein

the polymer resin film layer is formed on a portion of a surface of the active material layer or on an entire surface of the active material layer, and

the polymer resin film layer is configured to form a single layer stacked on the electrode base.

5. The electrode according to claim 1 , wherein

the polymer resin film layer is an electrical insulating film and having a partial opening for ionic permeability.

6. The electrode according to claim 1 , wherein

the polymer resin film layer is formed on both of the surface of an entire surface of the active material layer, and a surface of the electrode base around the active material layer in a direction extending along a plane of the electrode base.

7. The electrode according to claim 1 , wherein

the polymer resin film layer is selectively formed on one of a surface of a thin portion having a thickness of at least 20% of an average thickness of the active material layer and a defect site penetrating through to the surface of the electrode base present in the active material layer.

8. The electrode according to claim 1 , wherein

the polymer resin film layer is selectively formed in the vicinity of a terminal end of the electrode base by a liquid ejection head configured to eject a polymer resin film layer forming ink for forming the polymer resin film layer.

9. The electrode according to claim 1 , wherein

the active material layer is present in the vicinity of an end face of the electrode base, and

the polymer resin film layer partially permeates the active material layer that is present in the vicinity of the end face of the electrode base.