Solid-state battery and method for manufacturing electrode active material

• US 10,147,937 B2
• Filed: 08/27/2014
• Issued: 12/04/2018
• Est. Priority Date: 09/02/2013
• Status: Active Grant

• Current Assignee: Mitsubishi Gas Chemical Company Incorporated (Mitsubishi Electric Corporation), Tohoku Techno Arch Co., Ltd.
• Original Assignee: Mitsubishi Gas Chemical Company Incorporated (Mitsubishi Electric Corporation), Tohoku Techno Arch Co., Ltd.
• Inventors: Nogami, Genki, Taniguchi, Mitsugu, Tazawa, Masaru, Unemoto, Atsushi, Matsuo, Motoaki, Orimo, Shinichi
• Primary Examiner(s): Rhee, Jane J
• Application Number:
  US14/913,166
• Publication Number:
  US 20160204466A1
• Time in Patent Office: 1,560 Days
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 2220/30 Batteries in portable systems, e.g. mobile phone, laptop
• CPC Class Codes: H01M 2300/0068 inorganic
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• CPC Class Codes: H01M 4/0471 involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
• CPC Class Codes: H01M 4/136 Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
• CPC Class Codes: H01M 4/137 Electrodes based on electro-active polymers
• CPC Class Codes: H01M 4/1397 of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
• CPC Class Codes: H01M 4/1399 of electrodes based on electro-active polymers
• CPC Class Codes: H01M 4/364 as mixtures
• CPC Class Codes: H01M 4/38 of elements or alloys
• CPC Class Codes: H01M 4/5815 Sulfides
• CPC Class Codes: H01M 4/587 for inserting or intercalating light metals
• CPC Class Codes: H01M 4/604 containing aliphatic main chain polymers
• CPC Class Codes: H01M 4/62 Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

One embodiment provides a solid-state battery that has a positive-electrode layer; a negative-electrode layer; and a lithium-ion-conducting solid electrolyte layer disposed between the positive-electrode layer and the negative-electrode layer. The positive-electrode layer contains a positive-electrode active material and a solid electrolyte comprising a hydride of a complex. Said positive-electrode active material is sulfur-based, and the solid electrolyte layer contains a solid electrolyte comprising a hydride of a complex.

Claims

1. A solid-state battery comprising:

a positive-electrode layer;

a negative-electrode layer; and

a lithium-ion-conducting solid electrolyte layer disposed between the positive-electrode layer and the negative-electrode layer, wherein

the positive-electrode layer contains a positive-electrode active material and a complex hydride solid electrolyte,

the positive-electrode active material is a sulfur-based electrode active material comprising a sulfur-polyacrylonitrile, S-carbon composite, or NiS, and

the solid electrolyte layer contains a complex hydride solid electrolyte.

2. The solid-state battery according to claim 1, wherein the sulfur-based electrode active material is selected from the group consisting of S-carbon composite, and NiS.

3. The solid-state battery according to claim 1, wherein the complex hydride solid electrolyte is LiBH₄ or a combination of LiBH₄ and an alkali metal compound represented by Formula (1) below:

MX 

 

(1),

wherein M represents an alkali metal atom selected from the group consisting of a lithium atom, a rubidium atom, and a cesium atom, and X represents a halogen atom or an NH₂ group.

4. The solid-state battery according to claim 3, wherein the alkali metal compound is selected from the group consisting of a rubidium halide, a lithium halide, a cesium halide, and a lithium amide.

5. The solid-state battery according to claim 1, wherein the positive-electrode layer is formed by pressing.