Electrode

Patent metadata

Field	Value
Publication number	US-10658674-B2
Application number	US-201515506514-A
Country	US
Kind code	B2
Filing date	Aug 21, 2015
Priority date	Aug 25, 2014
Publication date	May 19, 2020
Grant date	May 19, 2020

Abstract

An electrode for improving the durability of a battery includes a current collector and an active material layer. The current collector has a conductive resin layer including a polymer material and a conductive filler. The electrode further includes a conductive member, which is in electrical contact with the conductive filler, between the current collector and the active material layer.

First claim

The invention claimed is:

1. An electrode comprising:
a current collector which is a conductive resin layer containing a mixture of a polymer material and a conductive filler; and
an active material layer,
wherein the electrode further includes only a granular-shaped, powder-shaped, or fiber-shaped conductive member, which is in electrical contact with the conductive filler, between the current collector and the active material layer, and
wherein the conductive member consists of at least one conductive material selected from the group consisting of at least one metal, an alloy having the at least one metal as a main component, or a conductive carbon, the at least one metal being selected from the group consisting of cobalt, nickel, tin, antimony, copper, silver, palladium, iridium, platinum, gold, iron, titanium, zirconium, tantalum, or niobium.

2. The electrode according to claim 1 , wherein the electrode has a structure in which at least a part of the conductive member extends beyond the surface of the conductive resin layer and is present inside the conductive resin layer.

3. The electrode according to claim 1 , wherein the conductive member is a granular-shaped or powder-shaped conductive material having an average particle diameter of primary particles of 0.01 to 3 μm or a fiber-shaped conductive material having an average fiber length of 0.1 to 100 μm and an average diameter of 0.01 to 3 μm.

4. The electrode according to claim 1 , wherein the active material layer is a positive electrode active material layer and the conductive member is formed only from at least one granular-shaped, powder-shaped, or fiber-shaped conductive material selected from the group consisting of conductive carbon, titanium, or stainless steel.

5. A method for producing the electrode according to claim 1 , the method comprising:
a step of applying an ink containing a solvent and at least one granular-shaped, powder-shaped, or fiber-shaped conductive material selected from the group consisting of at least one metal, an alloy having the at least one metal as a main component, or conductive carbon to a current collector which includes a conductive resin layer containing a polymer material and a conductive filler to obtain a laminate in which a conductive member formed only from the conductive material is formed on the current collector, the at least one metal being selected from the group consisting of cobalt, nickel, tin, antimony, copper, silver, palladium, iridium, platinum, gold, iron, titanium, zirconium, tantalum, or niobium; and
a step of forming an active material layer on the conductive member.

6. The method for producing the electrode according to claim 5 , further comprising a step of subjecting the laminate to heat pressing.

7. An electrode comprising:
a current collector which includes a conductive resin layer containing a polymer material and a conductive filler; and
an active material layer,
wherein the electrode further includes only a granular-shaped, powder-shaped, or fiber-shaped conductive member, which is in electrical contact with the conductive filler, between the current collector and the active material layer, wherein the active material layer is a negative electrode active material layer and the conductive member is formed only from at least one granular-shaped, powder-shaped, or fiber-shaped conductive material selected from the group consisting of nickel, copper, iron, or stainless steel.

Assignees

• Nissan Motor

Inventors

• Ohsawa Yasuhiko
• Satou Hajime
• Akama Hiroshi
• Horie Hideaki
• Mizuno Yusuke
• Fukumoto Hiroshi
• Okura Masatoshi
• Shindo Yasuhiro
• Tsudo Yasuhiro

Classifications

• H01M2004/029

  Bipolar electrodes · CPC title

• H01M4/13 Primary

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/668 Primary

  Composites of electroconductive material and synthetic resins · CPC title

• H01M4/137

  Electrodes based on electro-active polymers · CPC title