Secondary battery system

Patent metadata

Field	Value
Publication number	US-10916952-B2
Application number	US-201715587795-A
Country	US
Kind code	B2
Filing date	May 5, 2017
Priority date	May 30, 2016
Publication date	Feb 9, 2021
Grant date	Feb 9, 2021

Abstract

An object of the present disclosure is to provide a secondary battery system that functions at high voltage. The present disclosure attains the object by providing a secondary battery system comprising: a hybrid ion battery provided with a cathode active material layer having a cathode active material that contains a metal element capable of taking two kinds or more of a positive valence, an anode active material layer having an anode active material that contains a metal element capable of taking a valence of +2 or more, and an electrolyte layer containing an alkali metal ion and fluoride anion, and formed between the cathode active material layer and the anode active material layer; and a controlling portion that controls charging and discharging of the hybrid ion battery; wherein the controlling portion controls discharging so that a potential of the cathode active material includes a potential range higher than 0.23 V (vs. SHE).

First claim

What is claimed is:

1. A secondary battery system comprising:
a hybrid ion battery provided with a cathode active material layer having a cathode active material that contains a first metal element capable of taking two kinds or more of a positive valence and reacts with a fluoride ion (F − ), an anode active material layer having an anode active material that contains a second metal element, which may be the same as or different from the first metal element, capable of taking a valence of +2 or more and reacts with a fluoride ion (F − ), and an electrolyte layer containing a lithium ion and a fluoride ion (F − ), and formed between the cathode active material layer and the anode active material layer; and
a controlling portion that controls charging and discharging of the hybrid ion battery;
wherein the controlling portion controls discharging so that a potential of the cathode active material includes a potential range higher than 0.23 V (vs. SHE);
wherein the electrolyte layer is a liquid electrolyte comprising a lithium salt, a fluoride salt and an organic solvent;
wherein the first metal element is Fe,
wherein an amount of the lithium salt, when an amount of the fluoride salt in the liquid electrolyte is regarded as 1 mol part, is in a range of 2 mol parts to 10 mol parts;
wherein the cathode active material is FeF 3 or Fe;
wherein the anode active material is Ce or CeFx, the x being a real number larger than 0; and
wherein the cathode active material layer further contains fluorine-based binder, and a carbon material.

2. The secondary battery system according to claim 1 , wherein the cathode active material is at least one of a metal fluoride, a metal acid fluoride, and a simple substance of metal.

3. The secondary battery system according to claim 1 , wherein the electrolyte layer contains an inorganic fluoride salt including F − as anion.

4. The secondary battery system according to claim 3 , wherein the inorganic fluoride salt is XF, wherein X is Li, Na, K, Rb or Cs.

5. The secondary battery system according to claim 3 , wherein the inorganic fluoride salt is LiF.

6. The secondary battery system according to claim 1 , wherein the electrolyte layer contains an organic fluoride salt including F − as anion.

7. The secondary battery system according to claim 1 , wherein the amount of the lithium salt, when the amount of the fluoride salt in the liquid electrolyte is regarded as 1 mol part, is in a range of 5 mol parts to 10 mol parts.

Assignees

• Nakamoto Hirofumi
• Ogumi Zempachi
• Abe Takeshi
• Toyota Motor Co Ltd
• Univ Kyoto

Inventors

• Nakamoto Hirofumi
• Ogumi Zempachi
• Abe Takeshi

Classifications

• H02J7/70

  characterised by the mechanical construction · CPC title

• H02J7/575

  Parallel/serial switching of connection of batteries to charge or load circuit · CPC title

• H01M4/38 Primary

  of elements or alloys · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title