All-solid-state secondary battery

Patent metadata

Field	Value
Publication number	US-2016197351-A1
Application number	US-201514865619-A
Country	US
Kind code	A1
Filing date	Sep 25, 2015
Priority date	Mar 26, 2013
Publication date	Jul 7, 2016
Grant date	—

Abstract

An all-solid-state secondary battery, wherein: an anode current collector that contains copper or copper alloy; a cathode current collector comprising aluminum, aluminum alloy or stainless steel, provided opposite to the anode current collector; an anode active material layer formed there between from the anode current collector side on the surface of the anode current collector; a solid electrolyte layer comprising a sulfide solid electrolyte that contains a monovalent or divalent metal and sulfur; and a cathode active material layer formed on the surface of the cathode current collector are layered successively, is used. A sulfidation resistant layer is formed on the surface of the anode current collector on which the anode active material layer is formed. Or, the surface of the anode current collector on which the anode active material layer is formed has a compressive strength of 1250 to 3000 MPa.

First claim

1 . An all-solid-state secondary battery, which comprises: an anode current collector that contains copper or copper alloy; a cathode current collector comprising aluminum, aluminum alloy or stainless steel, provided opposite to the anode current collector; an anode active material layer formed there between from the anode current collector side on the surface of the anode current collector; a solid electrolyte layer comprising a sulfide solid electrolyte that contains a monovalent or divalent metal and sulfur; and a cathode active material layer formed on the surface of the cathode current collector, layered successively, which further comprises a sulfidation resistant layer formed on the surface of the anode current collector on which the anode active material layer is formed, wherein the sulfidation resistant layer is a copper sulfide layer that contains copper sulfide or a copper oxide layer that contains copper oxide.

2 . The all-solid-state secondary battery according to claim 1 , wherein the copper sulfide layer or the copper oxide layer has a thickness of 0.01 to 1 μm.

3 . The all-solid-state secondary battery according to claim 1 , wherein the copper oxide layer comprises a first layer on the anode current collector side, which mainly contains cuprous oxide, and a second layer on the surface layer side, which mainly contains cupric oxide.

4 . An all-solid-state secondary battery, which comprises: an anode current collector that contains copper or copper alloy; a cathode current collector comprising aluminum, aluminum alloy or stainless steel, provided opposite to the anode current collector; an anode active material layer formed there between from the anode current collector side on the surface of the anode current collector; a solid electrolyte layer comprising a sulfide solid electrolyte that contains a monovalent or divalent metal and sulfur; and a cathode active material layer formed on the surface of the cathode current collector, layered successively, which further comprises a sulfidation resistant layer formed on the surface of the anode current collector on which the anode active material layer is formed, wherein the sulfidation resistant layer is a sulfidation resistant metal layer that contains at least one element selected from nickel, zinc, or tin.

5 . The all-solid-state secondary battery according to claim 4 , wherein the sulfidation resistant metal layer has a thickness of 0.01 to 5 μm.

6 . The all-solid-state secondary battery according to claim 4 , wherein the zinc or tin in the sulfidation resistant metal layer undergoes diffusion alloying with the copper in the anode current collector to form a diffusion alloying layer.

7 . The all-solid-state secondary battery according to claim 6 , wherein a nickel layer is further formed on top of the diffusion alloying layer.

8 . An anode current collector used in an all-solid-state secondary battery, which comprises a substrate and the sulfidation resistant metal layer described in claim 4 layered thereon.

9 . An anode for all-solid-state secondary battery, which utilizes the anode current collector of claim 8 .

10 . An anode for all-solid-state secondary battery, which comprises the anode current collector according to claim 8 and an anode active material layer that contains a sulfide solid electrolyte layered thereon.

11 . An all-solid-state secondary battery, which comprises: an anode current collector that contains copper or copper alloy; a cathode current collector comprising aluminum, aluminum alloy or stainless steel provided opposite to the anode current collector; an anode active material layer formed there between from the anode current collector side on the surface of the anode current collector; a solid electrolyte layer comprising a sulfide solid electrolyte that contains a monovalent or divalent metal and sulfur; and a cathode active material layer formed on the surface of the cathode current collector, layered successively, wherein the surface of the anode current collector on which the anode active material layer is formed has a compressive strength of 1250 to 3000 MPa.

12 . The all-solid-state secondary battery according to claim 11 , wherein the surface of the anode current collector on which the anode active material layer is formed has a compressive elastic modulus of 60 to 125 GPa.

13 . The all-solid-state secondary battery according to claim 11 , which further comprises a copper electrodeposition layer that contains molybdenum or tungsten on the surface of the anode current collector, wherein the copper electrodeposition layer has a thickness of 0.1 to 2.5 μm.

14 . The all-solid-state secondary battery according to claim 11 , wherein one of sulfur, M x Mo 6 X 8-y (M=metal, X═S, Se, Te, 0≦x≦4.0, 0≦y≦0.2), or Mo 6 S 8 , (0≦x≦0.2) is used as a cathode active material contained in the cathode active material layer.

15 . The all-solid-state secondary battery according to claim 11 , wherein the anode active material contained in the anode active material layer is M x P y (0.9≦x, y≦10, M=Si, Sn, In, Al, Zn).

16 . The all-solid-state secondary battery according to claim 11 , wherein the anode active material layer contains the sulfide solid electrolyte.

Assignees

• Furukawa Electric Co Ltd

Inventors

• Tani Toshio
• Aragaki Masanobu
• Futaba Isamu
• Hikami Toshiya

Classifications

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0562

  Solid materials · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M4/58

  of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates · CPC title