Non-aqueous electrolyte secondary battery

• US 20050048371A1
• Filed: 08/13/2004
• Published: 03/03/2005
• Est. Priority Date: 09/02/2003
• Status: Active Grant

• Current Assignee: Nissan Motor Co., Ltd.
• Original Assignee: Nissan Motor Co., Ltd.
• Inventors: Nemoto, Kouichi, Nagayama, Mori
• Granted Patent: US 7,384,707 B2
• Time in Patent Office: Days
• US Class Current: 429/236
• CPC Class Codes: C25F 3/02 Etching
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 2004/021 Physical characteristics, e.g. porosity, surface area
• CPC Class Codes: H01M 2004/028 Positive electrodes
• CPC Class Codes: H01M 2300/0085 Immobilising or gelification of electrolyte
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• CPC Class Codes: H01M 4/0416 involving impregnation with a solution, dispersion, paste or dry powder H01M4/0438 takes precedence
• CPC Class Codes: H01M 4/044 Activating, forming or electrochemical attack of the supporting material
• CPC Class Codes: H01M 4/0471 involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis
• CPC Class Codes: H01M 4/131 Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 4/80 Porous plates, e.g. sintered carriers
• CPC Class Codes: H01M 6/48 with bipolar electrodes
• 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 non-aqueous electrolyte secondary battery of the present invention has an electrode and an electrolyte layer. The electrode includes a collector having a lot of fine pores on its surface, and a membrane layer made of an electrode active material provided along the surface shape of the fine pores of the collector. By this structure, the battery can manifest an excellent performance even in charging and discharging at high speed without using a binder and conductive material.

Claims

1. A non-aqueous electrolyte secondary battery, comprising:

an electrode including;

a collector having a lot of fine pores on its surface; and

a membrane layer made of an electrode active material, the membrane layer being provided along a surface shape of the fine pores of the collector.

2. A non-aqueous electrolyte secondary battery according to claim 1,

wherein the membrane layer has a thickness of 1 μ

m or less.

3. A non-aqueous electrolyte secondary battery according to claim 1,

wherein the electrode is a positive electrode, and

the collector is made of at least one selected from single bodies or alloys of aluminum, tantalum, niobium, titanium, hafnium, zirconium, zinc, tungsten, bismuth and antimony, and stainless alloy.

4. A non-aqueous electrolyte secondary battery according to claim 1,

wherein the electrode is a positive electrode, and

the positive electrode active material is made of a composite oxide or salt containing lithium and at least one element selected from the group consisting of cobalt, nickel, manganese, titanium, vanadium and iron.

5. A non-aqueous electrolyte secondary battery according to claim 1,

wherein the non-aqueous electrolyte secondary battery is a bipolar battery.

6. A non-aqueous electrolyte secondary battery according to claim 1,

wherein the non-aqueous electrolyte secondary battery is used in a battery module.

7. A non-aqueous electrolyte secondary battery according to claim 1,

wherein the non-aqueous electrolyte secondary battery is used in a vehicle.

8. A non-aqueous electrolyte secondary battery according to claim 1,

wherein the fine pores of the collector is formed by etching a collector material in an electrolytic solution.

9. A non-aqueous electrolyte secondary battery according to claim 1,

wherein the membrane layer is formed by a sol-gel method.