Electrode Material for Non-Aqueous Electrolyte Secondary Battery, and Electrode for Non-Aqueous Electrolyte Secondary Battery and Non-Aqueous Electrolyte Secondary Battery Using the Same

Patent metadata

Field	Value
Publication number	US-2016248086-A1
Application number	US-201415027990-A
Country	US
Kind code	A1
Filing date	Oct 3, 2014
Priority date	Oct 7, 2013
Publication date	Aug 25, 2016
Grant date	—

Abstract

A core-shell-type electrode material is used as an electrode active material layer of a non-aqueous electrolyte secondary battery, the core-shell-type electrode material having a core part including an electrode active material and a shell part in which a conductive material is contained in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state.

First claim

1 . An electrode material for a non-aqueous electrolyte secondary battery used for a non-aqueous electrolyte secondary battery using a liquid electrolyte, a gel polymer electrolyte, or an ionic liquid electrolyte, the electrode material comprising:
a core part including an electrode active material; and a shell part in which a conductive material is included in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state, the gel-forming polymer being a polyurethane resin which is obtained by reaction of a polyisocyanate compound with polyether polyols, polyester polyols, polyester polycarbonate polyols, crystalline or noncrystalline polycarbonate polyols, polybutadiene polyol, or silicone polyol.

2 . (canceled)

3 . The electrode material for a non-aqueous electrolyte secondary battery according to claim 1 , wherein the polyurethane resin is obtained by reaction of polyethylene glycol and a polyisocyanate compound.

4 . The electrode material for a non-aqueous electrolyte secondary battery according to claim 1 , wherein the electrode active material is a carbon material.

5 . A non-aqueous electrolyte secondary battery electrode obtained by forming an electrode active material layer on a surface of a current collector, the electrode active material layer comprising an electrode material, the electrode material comprising:
a core part including an electrode active material; and a shell part in which a conductive material is included in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state, the gel-forming polymer being a polyurethane resin which is obtained by reaction of a polyisocyanate compound with polyether polyols, polyester polyols, polyester polycarbonate polyols, crystalline or noncrystalline polycarbonate polyols, polybutadiene polyol, or silicone polyol.

6 . The non-aqueous electrolyte secondary battery electrode according to claim 5 , wherein the electrode active material layer comprises a binder, and the binder is an aqueous binder.

7 . The non-aqueous electrolyte secondary battery electrode according to claim 5 , wherein the current collector comprises a conductive resin layer formed by a resin having conductivity.

8 . A non-aqueous electrolyte secondary battery comprising a power generating element,
the power generating element comprising: the electrode according to claim 5 ; another electrode having a polarity different from that of the electrode; and an electrolyte layer interposed between active material layers of these two electrodes.

9 . The non-aqueous electrolyte secondary battery according to claim 8 , wherein the electrolyte layer comprises a liquid electrolyte, a polymer gel electrolyte, or an ionic liquid electrolyte.

10 . The non-aqueous electrolyte secondary battery according to claim 8 , wherein the battery is a bipolar type lithium ion secondary battery.

11 . A method for producing an electrode material for a non-aqueous electrolyte secondary battery, the method comprising a coating step of coating a core part including an electrode active material with a shell part in which a conductive material is included in a base material formed by a gel-forming polymer having a tensile elongation at break of 10% or more in a gel state, the gel-forming polymer being a polyurethane resin which is obtained by reaction of a polyisocyanate compound with polyether polyols, polyester polyols, polyester polycarbonate polyols, crystalline or noncrystalline polycarbonate polyols, polybutadiene polyol, or silicone polyol.

12 . The producing method according to claim 11 , further comprising:
a step of preparing a mixture comprising the base material and the conductive material in advance before the coating step, wherein the coating step comprises a step of coating the core part with the mixture.

13 .- 15 . (canceled)

Assignees

• Nissan Motor

Inventors

• Ohsawa Yasuhiko
• Horie Hideaki
• Akama Hiroshi
• Kusachi Yuki
• Murakami Yuta
• Kawakita Kenichi
• Mizuno Yusuke
• Tsudo Yasuhiro
• Shindo Yasuhiro

Classifications

• H01M4/0402

  Methods of deposition of the material · CPC title

• H01M4/366 Primary

  as layered products · CPC title

• H01M4/621

  Binders · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/668

  Composites of electroconductive material and synthetic resins · CPC title