Battery and method of manufacturing the same

• US 9,917,326 B2
• Filed: 09/28/2012
• Issued: 03/13/2018
• Est. Priority Date: 10/06/2011
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Furukawa, Keiko, Furuya, Tatsuya
• Primary Examiner(s): Slifka, Sarah A.
• Assistant Examiner(s): Ohara, Brian R
• Application Number:
  US14/347,125
• Publication Number:
  US 20140220454A1
• Time in Patent Office: 1,992 Days
• 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;

a solid electrolyte layer including a polymer material; and

at least two types of solid electrolyte binders, wherein a first type of solid electrolyte binder of the at least two types of solid electrolyte binders has a first glass transition temperature and a second type of solid electrolyte binder of the at least two types of solid electrolyte binders has a second glass transition temperature, wherein each of the at least two types of solid electrolyte binders has at least one Li_xMO_y bond, where M is a glass-forming element, and x and y have values based on the glass-forming element,

wherein each of the cathode, the anode, and the solid electrolyte layer includes the at least two types of solid electrolyte binders.

2. The battery according to claim 1, wherein

the cathode and the anode include an active material capable of insertion and extraction of an electrode reactant, and

each of the at least two types of solid electrolyte binders includes an element of the electrode reactant, the glass-forming element, and one of oxygen (O) or sulfur (S) as constituent elements.

3. The battery according to claim 2, wherein each of the at least two types of solid electrolyte binders is glassy.

4. The battery according to claim 2, wherein

the electrode reactant is lithium (Li), and

one of the at least two types of solid electrolyte binders includes lithium as a constituent element.

5. The battery according to claim 2, wherein the glass-forming element is at least one of germanium (Ge), arsenic (As), tellurium (Te), gallium (Ga), titanium (Ti), bismuth (Bi), tungsten (W), molybdenum (Mo), niobium (Nb), or vanadium (V).

6. The battery according to claim 2, wherein, the at least two types of solid electrolyte binders are configured to flow into at least gaps between the active material by capillarity based on a heating of the at least two types of solid electrolyte binders at a temperature equal to or higher than the first glass transition temperature or the second glass transition temperature.

7. The battery according to claim 1, wherein the solid electrolyte layer includes a crystalline solid electrolyte of the polymer material, and at least one of the cathode or the anode include the crystalline solid electrolyte, wherein the crystalline solid electrolyte includes a sulfide or an oxide.

8. The battery according to claim 1, wherein the polymer material includes polyethylene oxide.

9. The battery according to claim 2, wherein one of the at least two types of solid electrolyte binders further includes a halogen element as one of the constituent elements.

12. The battery according to claim 1, wherein the at least two types of solid electrolyte binders are configured to be heated to a higher temperature among the first glass transition temperature and the second glass transition temperature.

13. The battery according to claim 1, wherein the anode is laminated with the cathode with the solid electrolyte layer between the anode and the cathode, and wherein the at least two types of solid electrolyte binders bind a cathode active material of the cathode with the solid electrolyte layer, and the at least two types of solid electrolyte binders bind an anode active material of the anode with the solid electrolyte layer.

10. An electronic apparatus, comprising:

a battery, wherein the battery includes;

a cathode;

an anode;

a solid electrolyte layer including a polymer material; and

at least two types of solid electrolyte binders, wherein a first type of solid electrolyte binder of the at least two types of solid electrolyte binders has a first glass transition temperature and a second type of solid electrolyte binder of the at least two types of solid electrolyte binders has a second glass transition temperature, wherein each of the at least two types of solid electrolyte binders has at least one Li_xMO_y bond, where M is a glass-forming element, and x and y have values based on the glass-forming element,

wherein each of the cathode, the anode, and the solid electrolyte layer includes the at least two types of solid electrolyte binders.

11. An electric vehicle, comprising:

a battery, wherein the battery includes;

a cathode;

an anode;

a solid electrolyte layer including a polymer material; and

at least two types of solid electrolyte binders, wherein a first type of solid electrolyte binder of the at least two types of solid electrolyte binders has a first glass transition temperature and a second type of solid electrolyte binder of the at least two types of solid electrolyte binders has a second glass transition temperature, wherein each of the at least two types of solid electrolyte binders has at least one Li_xMO_y bond, where M is a glass-forming element, and x and y have values based on the glass-forming element,

wherein each of the cathode, the anode, and the solid electrolyte layer includes the at least two types of solid electrolyte binders.