BATTERY AND METHOD OF MANUFACTURING THE SAME

• US 20140220454A1
• Filed: 09/28/2012
• Published: 08/07/2014
• Est. Priority Date: 10/06/2011
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Furukawa, Keiko, Furuya, Tatsuya
• Granted Patent: US 9,917,326 B2
• Time in Patent Office: Days
• US Class Current: 429/319
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 10/0585 of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• CPC Class Codes: H01M 2300/0068 inorganic
• 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: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A battery capable of improving ionic conduction is provided. The battery includes a cathode, an anode, and a solid electrolyte layer. One or more of the cathode, the anode, and the solid electrolyte layer includes a solid electrolyte binder.

Claims

1. A battery comprising:

a cathode;

an anode; and

a solid electrolyte layer, wherein

one or more of the cathode, the anode, and the solid electrolyte layer include a solid electrolyte binder.

2. The battery according to claim 1, wherein

the cathode and the anode include an active material capable of inserting and extracting an electrode reactant, and

the solid electrolyte binder includes an element of the electrode reactant, a glass-forming element, and one of oxygen (0) and sulfur (S) as constituent elements.

3. The battery according to claim 2, wherein the solid electrolyte binder is glassy.

4. The battery according to claim 2, wherein

the electrode reactant is lithium (Li), and

the solid electrolyte binder includes lithium as a constituent element.

5. The battery according to claim 2, wherein the glass-forming element is one or more of silicon (Si), boron (B), phosphorus (P), germanium (Ge), arsenic (As), tellurium (Te), aluminum (Al), gallium (Ga), titanium (Ti), bismuth (Bi), tungsten (W), molybdenum (Mo), niobium (Nb), and vanadium (V).

6. The battery according to claim 2, wherein the solid electrolyte binder is heated at temperature equal to or higher than a glass transition temperature Tg, and gets into at least gaps between the active material by utilizing capillarity.

7. The battery according to claim 1, wherein all of the cathode, the anode, and the solid electrolyte layer include the solid electrolyte binder.

8. The battery according to claim 1, wherein

the solid electrolyte layer includes a crystalline solid electrolyte, and

one or both of the cathode and the anode include the crystalline solid electrolyte.

9. A method of manufacturing a battery, the method comprising:

forming one or more of a cathode preparatory body, an anode preparatory body, and a solid electrolyte layer preparatory body to include a solid electrolyte binder; and

forming one or more of a cathode, an anode, and a solid electrolyte layer by heating the solid electrolyte binder.

10. The method of manufacturing the battery according to claim 9, wherein

the cathode preparatory body and the anode preparatory body include an active material capable of inserting and extracting an electrode reactant,

the solid electrolyte binder includes an element of the electrode reactant, a glass-forming element, and one of oxygen and sulfur as constituent elements, and

heating temperature of the solid electrolyte binder is equal to or higher than a glass transition temperature Tg.

11. The method of manufacturing the battery according to claim 9, wherein

both the cathode preparatory body and the solid electrolyte layer preparatory body include the solid electrolyte binder, and the solid electrolyte binder is heated after laminating the cathode preparatory body and the solid electrolyte layer preparatory body, or

both the anode preparatory body and the solid electrolyte layer preparatory body include the solid electrolyte binder, and the solid electrolyte binder is heated after laminating the anode preparatory body and the solid electrolyte layer preparatory body, or

all of the cathode preparatory body, the anode preparatory body, and the solid electrolyte layer preparatory body include the solid electrolyte binder, and the solid electrolyte binder is heated after laminating the cathode preparatory body and the anode preparatory body with the solid electrolyte layer preparatory body in between.

12. The method of manufacturing the battery according to claim 9, wherein a coating method is used as a formation method of one or more of the cathode preparatory body, the anode preparatory body, and the solid electrolyte layer preparatory body.