METHOD FOR PRODUCING ALL SOLID STATE BATTERY, ALL SOLID STATE BATTERY AND ALL SOLID STATE BATTERY SYSTEM

• US 20190319309A1
• Filed: 04/08/2019
• Published: 10/17/2019
• Est. Priority Date: 04/16/2018
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: OTAKI, Mitsutoshi, OSE, Norihiro, HAMA, Shigenori
• Granted Patent: US 10,818,977 B2
• Time in Patent Office: Days
• 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 10/0585 of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• CPC Class Codes: H01M 10/446 Initial charging measures
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H01M 2004/027 Negative electrodes
• CPC Class Codes: H01M 2300/0068 inorganic
• CPC Class Codes: H01M 4/134 Electrodes based on metals, Si or alloys
• CPC Class Codes: H01M 4/386 Silicon or alloys based on silicon
• CPC Class Codes: H01M 4/62 Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• 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

Abstract

A main object of the present disclosure is to provide a method for producing an all solid state battery capable of satisfying both of improving capacity durability and suppressing the increase of an initial resistance. The above object is achieved by providing a method for producing an all solid state battery, the method comprising: a preparing step of preparing an all solid state battery including a cathode layer, a solid electrolyte layer, and an anode layer, in this order; and an initial charging step of initially charging the all solid state battery, wherein the anode layer includes a metal particle capable of being alloyed with Li, and having two kinds or more of crystal orientation in one particle, as an anode active material, and in the initial charging step, the all solid state battery is charged to a battery voltage of 4.35 V or more and 4.55 V or less.

Claims

1. A method for producing an all solid state battery, the method comprising:

a preparing step of preparing an all solid state battery including a cathode layer, a solid electrolyte layer, and an anode layer, in this order; and

an initial charging step of initially charging the all solid state battery, wherein

the anode layer includes a metal particle capable of being alloyed with Li, and having two kinds or more of crystal orientation in one particle, as an anode active material, and

in the initial charging step, the all solid state battery is charged to a battery voltage of 4.35 V or more and 4.55 V or less.

2. The method for producing an all solid state battery according to claim 1, wherein the metal particle is a simple substance of Si or a Si alloy.

3. The method for producing an all solid state battery according to claim 1, wherein the anode layer includes a sulfide solid electrolyte.

4. An all solid state battery comprising a cathode layer, a solid electrolyte layer, and an anode layer, in this order, and

the anode layer includes a metal particle capable of being alloyed with Li, and having two kinds or more of crystal orientation in one particle, as an anode active material, and

an amorphization rate of the metal particle is 40.2% or more and 49.6% or less.

5. The all solid state battery according to claim 4, wherein the metal particle is a simple substance of Si or a Si alloy.

6. The all solid state battery according to claim 4, wherein the anode layer includes a sulfide solid electrolyte.

7. An all solid state battery system comprising the all solid state battery according to claim 4, and a controlling apparatus controlling charge and discharge of the all solid state battery, and

the controlling apparatus is an apparatus that controls an upper limit of a battery voltage to 4.35 V or less.