All-solid rechargeable battery, method for manufacturing same, and electronic apparatus

Patent metadata

Field	Value
Publication number	US-2016172704-A1
Application number	US-201615051905-A
Country	US
Kind code	A1
Filing date	Feb 24, 2016
Priority date	Aug 26, 2013
Publication date	Jun 16, 2016
Grant date	—

Abstract

The present invention relates to an all-solid rechargeable battery, a method for manufacturing the same, and an electronic apparatus, makes the annealing step for crystallization unnecessary in the all-solid rechargeable battery. The present invention includes a substrate, a negative electrode, a solid electrolyte, and a positive electrode, wherein LiFePO 4 in an amorphous state is used as the positive electrode.

First claim

What is claimed is:

1 . An all-solid rechargeable battery, comprising:
a substrate; a negative electrode; a solid electrolyte; and a positive electrode, wherein LiFePO 4 in an amorphous state is used as the positive electrode.

2 . The all-solid rechargeable battery according to claim 1 , wherein the substrate, the negative electrode, the solid electrolyte and the positive electrode are layered in this order.

3 . The all-solid rechargeable battery according to claim 1 , wherein
the negative electrode is made of Li, and the solid electrolyte is made of LiPON or LiAl(PO 4 )(P 2 O 7 ).

4 . The all-solid rechargeable battery according to claim 1 , wherein a number of unit cells made of a negative electrode/a solid electrolyte/a positive electrode are layered on top of each other with a current collector in between.

5 . A method for manufacturing an all-solid rechargeable battery, comprising:
forming films in a multilayer structure made of a current collector, an LiFePO 4 film, a solid electrolyte, a negative electrode and a current collector on a substrate at room temperature without carrying out heat treatment during a manufacturing process, or forming a current collector, a negative electrode, a solid electrolyte, an LiFePO 4 film and a current collector on a substrate at room temperature without carrying out heat treatment during a manufacturing process.

6 . An electronic apparatus, comprising:
a substrate on which an electronic device is mounted; and an all-solid rechargeable battery formed on a surface of the substrate, wherein a positive electrode is made of an LiFePO 4 film in an amorphous state.

7 . The electronic apparatus according to claim 6 , wherein the all-solid rechargeable battery is integrally formed of films of a current collector, a negative electrode, a solid electrolyte, an LiFePO 4 film in an amorphous state and a current collector that are layered in this order on a surface of the substrate.

8 . The electronic apparatus according to claim 6 , wherein the all-solid rechargeable battery is integrally formed of films of a current collector, an LiFePO 4 film in an amorphous state, a solid electrolyte, a negative electrode and a current collector that are layered in this order on a surface of the substrate.

9 . The electronic apparatus according to claim 6 , comprising:
a first all-solid rechargeable battery integrally formed of films of a current collector, a negative electrode, a solid electrolyte, an LiFePO 4 film in an amorphous state and a current collector that are layered in this order on a surface of the substrate; and a second all-solid rechargeable battery integrally formed of films of a current collector, an LiFePO 4 film in an amorphous state, a solid electrolyte, a negative electrode and a current collector that are layered in this order on the surface, wherein the first all-solid rechargeable battery and the second all-solid rechargeable battery are electrically connected to each other in series.

10 . The electronic apparatus according to claim 6 , wherein the all-solid rechargeable battery is a multilayer type rechargeable battery where a number of unit cells made of a negative electrode, a solid electrolyte and LiFePO 4 in an amorphous state are layered on top of each other with a current collector in between.

11 . The electronic apparatus according to claim 6 , wherein
the electronic device has a structure comprising a number of p-n junction diodes using an organic semiconductor that can generate photoelectromotive force and thermoelectromotive force, and the electronic apparatus further comprises a switching means for switching the p-n junction diodes between a series connection state and a parallel connection state in the structure.

12 . The electronic apparatus according to claim 6 , wherein
the negative electrode is made of Li, and the solid electrolyte is made of LiPON or LiAl(PO 4 )(P 2 O 7 ).

Assignees

• Fujitsu Ltd

Inventors

• Watanabe Satoru
• Kurita Tomochika

Classifications

• H01M10/0585

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

• H01M4/136 Primary

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• H01M10/0562

  Solid materials · CPC title

• H01M4/64

  Carriers or collectors · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title