Secondary battery and production method thereof

• US 20060121342A1
• Filed: 11/16/2005
• Published: 06/08/2006
• Est. Priority Date: 11/17/2004
• Status: Abandoned Application

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Nishimura, Shin, Miyasaka, Toru, Sano, Yuichiro
• Application Number:
  US11/274,502
• Publication Number:
  US 20060121342A1
• Time in Patent Office: Days
• US Class Current: 429/162
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• CPC Class Codes: H01M 10/058 Construction or manufacture
• CPC Class Codes: H01M 2004/021 Physical characteristics, e.g. porosity, surface area
• CPC Class Codes: H01M 4/13 Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
• CPC Class Codes: H01M 4/139 Processes of manufacture
• 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
• CPC Class Codes: Y10T 29/49112 including laminating of indefinite length material
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

The present invention proposes a secondary battery structure with a solid electrolyte, which can secure high reliability at a low cost and realize high energy density and high output, and also proposes a method for producing the secondary battery structure simply at a low cost while realizing reduced size and weight. The present invention provides a secondary battery structure of planar, inter digital shape as the one with a solid electrolyte, capable of realizing reduced cost, high safety, high energy density and high output, wherein anode and cathode collectors of pectinate shape are provided to face each other on a flat substrate by patterning, anode and cathode material particles are patterned on the respective anode and cathode collectors by electrophotography in the vertical direction to the collector surface to form the vertical electrodes, and the gap between the adjacent anode and cathode is filled with the solid electrolyte.

Claims

1. A secondary battery comprising;

an anode (a positive electrode) comprising an anode (a positive electrode) material and including an anode (a positive electrode) collector reversibly occluding and releasing an ion-conducting substance;

a cathode (a negative electrode) comprising a cathode (negative electrode) material and including a cathode (a negative electrode) collector; and

an electrolyte responsible for conducting an ion-conducting substance, wherein

the anode collector and the cathode collector are arranged alternately on one side of a substrate, the anode comprising the anode material is formed on the anode collector, the cathode comprising the cathode material is formed on the cathode collector, and a solid electrolyte is placed between the anode collector/the anode and the cathode collector/the cathode.

2. The secondary battery according to claim 1, wherein

the anode and the cathode are arranged in the form of inter digital in a top plan view, with each digital being oppositely arranged at a prescribed interval.

3. The secondary battery according to claim 1, wherein

the solid electrolyte is formed by filling a gap between the anode and the cathode with a liquid precursor for the electrolyte and then solidifying the precursor.

4. The secondary battery according to claim 1, wherein

the electrode material to be formed into the electrode is composed of particles having an average diameter of 0.1 to 10 μ

m.

5. The secondary battery according to claim 4, wherein

the electrode material has a binder resin layer on a surface thereof and an electroconductive material is dispersed in the binder resin layer.

6. The secondary battery according to claim 4, wherein

the electrode material particles are present in the form of not single nucleus but a cluster.

7. The secondary battery according to claim 4, wherein

the electrode material particles and the electroconductive material are incorporated in the binder resin.

8. A method for producing a secondary battery, comprising steps of:

forming an anode collector and a cathode collector alternately on one side of a substrate;

laminating an anode material on the anode collector;

laminating a cathode material on the cathode collector; and

placing a solid electrolyte between the anode collector/the anode and the cathode collector/the cathode, wherein

the anode material and the cathode material are charged by friction, each material is laminated due to a Coulomb force by applying a voltage to the anode collector and the cathode collector, and then the anode and the cathode are formed by melting the materials under heating or by a solvent.

9. The method according to claim 8, which is based on a dry process using no carrier solvent for a development.

10. The method according to claim 8,

which is based on a wet process using a carrier solvent for a development.

11. The method according to claim 8, wherein

a solid electrolyte is filled between the adjacent anode and cathode after forming the anode and the cathode.