Anode for high-energy batteries

Patent metadata

Field	Value
Publication number	US-2020063036-A1
Application number	US-201916458074-A
Country	US
Kind code	A1
Filing date	Jun 30, 2019
Priority date	Jun 21, 2013
Publication date	Feb 27, 2020
Grant date	—

Abstract

Anode comprising an anode material, a protective material and a current collector is provided. The anode material is a mixture comprising an active material, at least one electronically conductive agent and at least one binder. The active material may be an alloy of silicon and lithium or an alloy of silicon oxide and lithium. There is provided a process for the preparation of the anode. Also, there is provided use of the anode in the fabrication of a battery.

First claim

1 - 45 . (canceled)

46 . An anode comprising: a metal foil, a film of anode material, and at least one protective film.

47 . The anode of claim 46 , wherein the metal foil is a copper foil, an aluminum foil or an aluminum and carbon foil.

48 . The anode of claim 46 , wherein the film of anode material is deposited on the metal foil, and the at least one protective film is deposited on the anode material.

49 . The anode of claim 48 , wherein the metal foil is an aluminum foil, and in a lithium battery when the anode undergoes a cycle, a lithium-aluminum alloy is formed at the interface between the film of anode material and the aluminum foil.

50 . The anode of claim 46 , wherein the at least one protective film comprises a first protective film and a second protective film, wherein the first protective film is deposited on the metal foil, the film of anode material is deposited on the first protective film, and the second protective film deposited on the film of anode material.

51 . The anode of claim 46 , wherein the metal foil has a thickness of about 5 to 25 μm.

52 . The anode of claim 46 , wherein the film of anode material has a thickness of about 5 to 150 μm.

53 . The anode of claim 46 , wherein the protective film has a thickness of about 1 to 5 μm.

54 . The anode of claim 46 , wherein the metal foil has a thickness of about 5 to 25 μm, wherein the film of anode material has a thickness of about 5 to 150 μm, wherein the protective film has a thickness of about 1 to 5 μm.

55 . The anode of claim 49 , wherein the metal foil has a thickness of about 5 to 25 μm, wherein the film of anode material has a thickness of about 5 to 150 μm, wherein the protective film has a thickness of about 1 to 5 μm.

56 . The anode of claim 46 , wherein the metal foil has a thickness of about 10 to 15 μm, wherein the film of anode material has a thickness of about 30 to 50 μm, and wherein the protective film has a thickness of about 1 to 5 μm.

57 . The anode of claim 49 , wherein the metal foil has a thickness of about 10 to 15 μm, wherein the film of anode material has a thickness of about 30 to 50 μm, and wherein the protective film has a thickness of about 1 to 5 μm.

58 . The anode of claim 46 , wherein the anode material comprises an alloy of silicon and lithium or an alloy of silicon oxide and lithium.

59 . The anode of claim 46 , wherein
wherein the anode material is a mixture comprising:
an active material,
at least one electronically conductive agent, and
a binder, and
wherein the active material is an alloy of silicon and lithium or the active material comprises silicon oxide and lithium, wherein the binder in the anode material is a polymer, wherein, in the anode material, the active material and the at least one electronically conductive agent are in the form of particles in the binder, wherein the anode material comprises, in mass: 80-95% of the active material, 1-10% of the electronically active conductive agent, and 2-20% of the binder,

60 . The anode of claim 46 , wherein the protective material comprises:
at least one electronically conductive agent, and a binder.

61 . The anode of claim 59 , wherein the protective material comprises:
at least one electronically conductive agent, and a binder.

62 . The anode of claim 49 , wherein
wherein the metal foil has a thickness of about 5 to 25 μm, wherein the film of anode material has a thickness of about 5 to 150 μm, wherein the protective film has a thickness of about 1 to 5 μm.
wherein the anode material is a mixture comprising:
an active material,
at least one electronically conductive agent, and
a binder, and

wherein the active material is an alloy of silicon and lithium or the active material comprises silicon oxide and lithium,
wherein the binder in the anode material is a polymer,
wherein, in the anode material, the active material and the at least one electronically conductive agent are in the form of particles in the binder,
wherein the anode material comprises, in mass: 80-95% of the active material, 1-10% of the electronically active conductive agent, and 2-20% of the binder,
wherein the protective material comprises:
at least one electronically conductive agent, and
a binder.

63 . A battery comprising the anode of claim 46 .

64 . The battery according to claim 63 , which is a lithium battery.

Assignees

• Hydro Quebec

Inventors

• Zaghib Karim
• Leblanc Dominic
• Guerfi Abdelbast
• Trottier Julie
• Charest Patrick

Classifications

• H05K2201/012

  Flame-retardant; Preventing of inflammation · CPC title

• C08B15/005

  Crosslinking of cellulose derivatives · CPC title

• H05K1/0313

  Organic insulating material · CPC title

• H05K1/0353

  consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement · CPC title

• C08B37/0045

  alpha-D-Galacturonans, e.g. methyl ester of (alpha-1,4)-linked D-galacturonic acid units, i.e. pectin, or hydrolysis product of methyl ester of alpha-1,4-linked D-galacturonic acid units, i.e. pectinic acid; Derivatives thereof · CPC title