Electrode for secondary battery, secondary battery, and electronic apparatus

1. An electrode for a secondary battery, comprising:

a current collector which has a first face and a second face opposing the first face; and

an active material particle, the active material particle having a first end and a second end, the active material particle piercing the current collector with the first end exposed from the first face and the second end exposed from the second face.

2. The electrode for a secondary battery according to claim 1 , wherein the active material particle is a lithium composite metal oxide containing at least one type of transition metal and has an average particle diameter of 500 nm to 30 μm.

3. The electrode for a secondary battery according to claim 2 , wherein the current collector contains a metal material or an electrically conductive resin material.

4. The electrode for a secondary battery according to claim 1 comprising:

an electrolyte layer which covers the active material particle exposed from the first face and the second face of the current collector.

5. A secondary battery, comprising:

a first current collector which has a first face and a second face opposing the first face;

an active material particle, the active material particle having a first end and a second end, the active material particle piercing the first current collector with the first end exposed from the first face and the second end exposed from the second face;

an electrolyte layer which covers the active material particle exposed from the first face and the second face of the first current collector;

an electrode which is in contact with the electrolyte layer; and

a second current collector which is in contact with the electrode.

6. The secondary battery according to claim 5 , wherein the battery includes a package which encloses the first current collector, the electrolyte layer, the electrode, and the second current collector.

7. The secondary battery according to claim 6 , wherein the first current collector contains a metal material or an electrically conductive resin material.

8. A secondary battery, comprising:

a positive electrode including a first current collector which has a first face and a second face and a positive electrode active material particle which pierces the first current collector and is exposed from the first face and the second face;

a negative electrode including a second current collector which has a third face and a fourth face, and a negative electrode active material particle which pierces the second current collector and is exposed from the third face and the fourth face; and

an electrolyte layer which is provided between the positive electrode and the negative electrode.

9. The secondary battery according to claim 8 , wherein the battery includes a package which hermetically encloses the positive electrode, the negative electrode, and the electrolyte layer in a state where a portion of the first current collector and a portion of the second current collector are exposed.

10. The secondary battery according to claim 9 , wherein the first current collector and the second current collector are composed of a metal material or an electrically conductive resin material.

11. An electronic apparatus, comprising:

a sensor;

a display;

a processor; and

the secondary battery according to claim 5 .

12. An electronic apparatus, comprising:

a sensor;

a display;

a processor; and

the secondary battery according to claim 8 .