Secondary battery

Patent metadata

Field	Value
Publication number	US-9444100-B2
Application number	US-201214373105-A
Country	US
Kind code	B2
Filing date	Sep 21, 2012
Priority date	Jan 20, 2012
Publication date	Sep 13, 2016
Grant date	Sep 13, 2016

Abstract

In a secondary battery, a negative electrode, an electrolytic solution for negative electrode, a diaphragm, an electrolytic solution for positive electrode, and a positive electrode are disposed in order. The negative electrode includes a negative-electrode active material that has an element whose oxidation-reduction potential is more “base” by 1.5 V or more than an oxidation-reduction potential of hydrogen, and whose volume density is larger than that of lithium metal. The diaphragm includes a solid electrolyte transmitting ions of said element alone. A secondary battery with high volumetric density is provided.

First claim

The invention claimed is:

1. A secondary battery comprising a negative electrode, an electrolytic solution for negative electrode, a diaphragm, an electrolytic solution for positive electrode, and a positive electrode, which are disposed in order, characterized in that
said negative electrode comprises a negative-electrode material which has a metallic element and a volume density of said material is larger than that of lithium metal,
said positive electrode comprises a positive-electrode material which comprises copper, iron, silver or gold,
said metallic element comprises aluminum,
said diaphragm is a solid electrolyte which transmits aluminum ions alone, and
said solid electrolyte comprises a mixed membrane of polyethylene oxide and Al 2 (WO 4 ) 3 disposed on an aluminum disk.

2. The secondary battery as set forth in claim 1 , wherein said negative-electrode material comprises a metal comprising said metallic element, or an alloy including said metallic element.

3. The secondary battery as set forth in claim 1 , wherein said electrolytic solution for negative electrode is an organic electrolytic solution, or an ionic solution.

4. The secondary battery as set forth in claim 1 , wherein said positive electrode comprises a positive-electrode material that has an element, wherein an oxidation-reduction potential of said element is more “noble” by 1 V or more with respect to an oxidation-reduction potential of said negative electrode.

5. The secondary battery as set forth in claim 1 , wherein said electrolytic solution for negative electrode includes an ethylmethylimidazolium salt.

6. The secondary battery as set forth in claim 1 , wherein said electrolytic solution for positive electrode is a water-soluble electrolytic solution.

7. The secondary battery as set forth in claim 1 , wherein said positive-electrode active material is metallic copper.

8. The secondary battery as set forth in claim 1 , wherein said electrolytic solution for negative electrode comprises Al(NO 3 ) 3 .

9. The secondary battery as set forth in claim 1 , further comprising a porous body, wherein said porous body is impregnated with said electrolytic solution for negative electrode.

10. The secondary battery as set forth in claim 1 , wherein said electrolytic solution for positive electrode is a nitrate aqueous solution.

11. The secondary battery as set forth in claim 7 , claim 1 , wherein said electrolytic solution for positive electrode comprises Al(NO 3 ) 3 .

Assignees

• Toyota Jidoshokki Kk

Inventors

• Niwa Junichi
• Nakanishi Masataka
• Kawasumi Kazuhito
• Murase Masakazu

Classifications

• H01M4/02 Primary

  Electrodes composed of, or comprising, active material · CPC title

• H01M4/38 Primary

  of elements or alloys · CPC title

• H01M4/463

  Aluminium based · CPC title

• H01M4/466

  Magnesium based · CPC title

• H01M10/38

  Construction or manufacture · CPC title