Electric core for thin film battery

1. A laminated electric core for a lithium-ion battery, comprising:

a first current collecting substrate;

a first electrode active material layer coated on an inner surface of the first current collecting substrate;

a second current collecting substrate;

a second electrode active material layer coated on an inner surface of the second current collecting substrate;

a separator sandwiched between the first electrode active material layer and the second electrode active material layer, wherein an electrolyte is retained at least in the separator;

an adhesive layer between the first electrode active material layer and the separator, wherein the adhesive layer covers an entire surface of the first electrode active material layer on the first current collecting substrate, wherein the entire surface of the first electrode active material layer comprises a peripheral sidewall surface of the first electrode active material layer and a bottom surface of the first electrode active material layer directly facing the separator, and wherein the adhesive layer only partially overlaps with the separator;

a first sealant layer on the inner surface of the first current collecting substrate along peripheral edges of the first electrode active material layer; and

a second sealant layer on the inner surface of the second current collecting substrate along peripheral edges of the second electrode active material layer.

2. The laminated electric core for a lithium-ion battery according to claim 1 wherein ingredients of the first sealant layer permeate through the adhesive layer into porous structure of the first electrode active material layer to thereby form an elastic and robust overlapping interface along peripheral edges of the first electrode active material layer.

3. The laminated electric core for a lithium-ion battery according to claim 1 further comprising a packaging layer provided to seal the laminated electric core.

4. The laminated electric core for a lithium-ion battery according to claim 1 wherein the adhesive layer comprises particles dispersed in a binder matrix.

5. The laminated electric core for a lithium-ion battery according to claim 4 wherein the binder matrix comprises polyvinylidene fluoride (PVDF).

6. The laminated electric core for a lithium-ion battery according to claim 4 wherein at least some of the particles are encapsulated by an insulating coating.

7. The laminated electric core for a lithium-ion battery according to claim 6 wherein the insulating coating comprises polyvinyl chloride (PVC), polyethylene terephthalate (PET), polyimide (PI), polypropylene (PP), polyethylene (PE), silica gel, acrylic, or epoxy materials.

8. The laminated electric core for a lithium-ion battery according to claim 4 wherein the particles are non-conductive particles.

9. The laminated electric core for a lithium-ion battery according to claim 8 wherein the non-conductive particles comprise metal oxide or ceramic particles.

10. The laminated electric core for a lithium-ion battery according to claim 9 wherein the metal oxide comprises titanium oxide, aluminum oxide, or combination thereof.

11. The laminated electric core for a lithium-ion battery according to claim 4 wherein the particles have irregular shapes and various dimensions.

12. The laminated electric core for a lithium-ion battery according to claim 4 wherein the adhesive layer comprises two different kinds of particles dispersed in the binder matrix.