Secondary battery

Patent metadata

Field	Value
Publication number	US-9917330-B2
Application number	US-201315024467-A
Country	US
Kind code	B2
Filing date	Dec 10, 2013
Priority date	Dec 10, 2013
Publication date	Mar 13, 2018
Grant date	Mar 13, 2018

Abstract

Provided is a secondary battery being superior to a conventional secondary battery with respect to volume (energy density) and manufacturing (manufacturing workload). The present invention provides a secondary battery including a sheet-shaped first-electrode-functioning base material having a function as a first electrode and a function as a base material, a front-side storage layer formed on a front side of the first-electrode-functioning base material, a front-side second electrode layer layered on the front-side storage layer, a rear-side storage layer formed on a rear side of the first-electrode-functioning base material, and a rear-side second electrode layer layered on the rear-side storage layer.

First claim

The invention claimed is:

1. A secondary battery, comprising:
a sheet-shaped first-electrode-functioning base material having a function as a first electrode and a function as a base material;
a front-side charging layer formed on a front side of the first-electrode-functioning base material;
a front-side second electrode layer layered on the front-side charging layer;
a rear-side charging layer formed on a rear side of the first-electrode-functioning base material; and
a rear-side second electrode layer layered on the rear-side charging layer,
wherein the secondary battery further comprises a front-side first oxide semiconductor layer formed between the first-electrode-functioning base material and the front-side charging layer; and a rear-side first oxide semiconductor layer formed between the first-electrode-functioning base material and the rear-side charging layer,
wherein the front-side charging layer, the rear-side charging layer, the front-side first oxide semiconductor layer, and the rear-side first oxide semiconductor layer are not formed at one end of the first-electrode-functioning base material,
wherein an end face insulating portion is formed at the one end of the first-electrode-functioning base material where the front-side and rear-side charging layers and the front-side and rear-side first oxide semiconductor layers are not formed, to prevent a short circuit between the first-electrode functioning base material and the front-side and rear-side second electrode layers at the one end of the first-electrode-functioning base material, and
wherein a thickness of the end face insulation portion at a front side and a rear side of the first-electrode-functioning base material is approximately the same as a thickness of the front-side first oxide semiconductor layer and the rear-side first oxide semiconductor layer.

2. The secondary battery according to claim 1 , wherein each of the front-side charging layer and the rear-side charging layer is structured as a charging layer in which an oxide semiconductor causes photoexcited structural change as generating a number of electron-absent energy levels in a band gap so that charging is performed by causing electrons to be captured at the energy level and discharging is performed by causing captured electrons to be released, further comprising:
a front-side second oxide semiconductor layer formed between the front-side charging layer and the front-side second electrode layer; and
a rear-side second oxide semiconductor layer formed between the rear-side charging layer and the rear-side second electrode layer.

3. The secondary battery according to claim 1 ,
wherein the front-side charging layer, the front-side second electrode layer, the rear-side charging layer and the rear-side second electrode layer are not formed in a region for connecting the first electrode with an external first electrode member.

4. The secondary battery according to claim 1 , further comprising a base material end face insulating portion arranged at an end face of at least a part of the first-electrode-functioning base material to prevent short circuit of the front-side second electrode layer and the rear-side second electrode layer with the first electrode.

5. The secondary battery according to claim 2 ,
wherein the front-side first oxide semiconductor layer and the rear-side first oxide semiconductor layer are n-type metal oxide semiconductors, and
the front-side second oxide semiconductor layer and the rear-side second oxide semiconductor layer are p-type metal oxide semiconductors.

6. The secondary battery according to claim 2 ,
wherein the front-side first oxide semiconductor layer and the rear-side first oxide semiconductor layer are p-type metal oxide semiconductors, and
the front-side second oxide semiconductor layer and the rear-side second oxide semiconductor layer are n-type metal oxide semiconductors.

7. The secondary battery according to claim 2 ,
wherein the front-side charging layer, the front-side second electrode layer, the rear-side charging layer and the rear-side second electrode layer are not formed in a region for connecting the first electrode with an external first electrode member.

8. The secondary battery according to claim 2 , further comprising a base material end face insulating portion arranged at an end face of at least a part of the first-electrode-functioning base material to prevent short circuit of the front-side second electrode layer and the rear-side second electrode layer with the first electrode.

Assignees

• Nihon Micronics Kk
• Guala Tech Co Ltd

Inventors

• Izumo Shozo
• Saito Tomokazu
• Nakazawa Akira

Classifications

• H01M10/0585 Primary

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0413

  Large-sized flat cells or batteries for motive or stationary systems with plate-like electrodes · CPC title

• H01M10/0436

  Small-sized flat cells or batteries for portable equipment · CPC title

• H01M10/30

  Nickel accumulators (H01M10/34 takes precedence) · CPC title