Aqueous solution electrolyte secondary battery

Patent metadata

Field	Value
Publication number	US-11189830-B2
Application number	US-201816494080-A
Country	US
Kind code	B2
Filing date	Mar 8, 2018
Priority date	Mar 15, 2017
Publication date	Nov 30, 2021
Grant date	Nov 30, 2021

Abstract

An aqueous solution electrolyte secondary battery includes: a positive electrode including a positive electrode active material that reversibly occludes and releases lithium ions; a negative electrode including a negative electrode active material that reversibly occludes and releases lithium ions; and an aqueous solution electrolyte in which a lithium salt is dissolved. The negative electrode active material contains Mo, at least part of the Mo causes an oxidation-reduction reaction of Mo 3+ /Mo 6+ through charging and discharging, and a potential window for charging and discharging exceeds 2.0 V.

First claim

The invention claimed is:

1. An aqueous solution electrolyte secondary battery comprising:
a positive electrode including a positive electrode active material that reversibly occludes and releases lithium ions;
a negative electrode including a negative electrode active material that reversibly occludes and releases lithium ions; and
an aqueous solution electrolyte in which a lithium salt is dissolved, wherein
the negative electrode active material contains Mo,
at least part of the Mo causes an oxidation-reduction reaction of Mo 3+ /Mo 6+ through charging and discharging, and
a potential window for charging and discharging exceeds 2.0 V.

2. The aqueous solution electrolyte secondary battery according to claim 1 , wherein the negative electrode active material contains a complex oxide containing tetravalent or higher transition metal Me, trivalent Mo, and Li.

3. The aqueous solution electrolyte secondary battery according to claim 2 , wherein
the complex oxide contains at least one single-phase oxide selected from the group consisting of single-phase oxides having compositions of
x LiMoO 2 -(1 −x )Li 3 NbO 4   formula [1],

x LiMoO 2 -(1 −x )Li 4 MoO 5   formula [2], and

x LiMoO 2 −(1 −x )Li 2 TiO 3   formula [3], and

formulas [1] to [3] satisfy 0<x<1.

4. The aqueous solution electrolyte secondary battery according to claim 1 , wherein the aqueous solution electrolyte contains a lithium bis(perfluoroalkylsulfonyl)imide as at least part of the lithium salt.

5. The aqueous solution electrolyte secondary battery according to claim 1 , wherein at least part of the aqueous solution electrolyte forms a room temperature molten hydrate.

6. An aqueous solution electrolyte secondary battery comprising:
a positive electrode including a positive electrode active material that reversibly occludes and releases lithium ions;
a negative electrode including a negative electrode active material that reversibly occludes and releases lithium ions; and
an aqueous solution electrolyte in which a lithium salt is dissolved, wherein
the negative electrode active material contains Mo,
at least part of the Mo causes an oxidation-reduction reaction of Mo 3+ /Mo 6+ through charging and discharging, and
at least part of the aqueous solution electrolyte forms a room temperature molten hydrate.

7. The aqueous solution electrolyte secondary battery according to claim 1 , wherein
the positive electrode includes a positive electrode current collector and a positive electrode mixture including the positive electrode active material supported on the positive electrode current collector,
the negative electrode includes a negative electrode current collector and a negative electrode mixture including the negative electrode active material supported on the negative electrode current collector, and
at least one of the positive electrode current collector and the negative electrode current collector has a three-dimensional network metallic skeleton.

8. The aqueous solution electrolyte secondary battery according to claim 6 , wherein
the positive electrode includes a positive electrode current collector and a positive electrode mixture including the positive electrode active material supported on the positive electrode current collector,
the negative electrode includes a negative electrode current collector and a negative electrode mixture including the negative electrode active material supported on the negative electrode current collector, and
at least one of the positive electrode current collector and the negative electrode current collector has a three-dimensional network metallic skeleton.

Assignees

• Sumitomo Electric Industries
• Univ Tokyo Denki

Inventors

• Nitta Koji
• Sakai Shoichiro
• Fukunaga Atsushi
• Okuno Kazuki
• Yabuuchi Naoaki

Classifications

• H01M2300/0002

  Aqueous electrolytes · CPC title

• H01M10/36 Primary

  Accumulators not provided for in groups H01M10/05-H01M10/34 · CPC title

• H01M4/74

  Meshes or woven material; Expanded metal · CPC title

• H01M4/80

  Porous plates, e.g. sintered carriers · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title