Secondary battery or cell with a non-aqueous electrolyte

• US 6,294,291 B1
• Filed: 04/03/1992
• Issued: 09/25/2001
• Est. Priority Date: 09/03/1990
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Ozaki, Yoshiyuki, Eda, Nobuo, Morita, Akiyoshi
• Primary Examiner(s): CHANEY, CAROL DIANE
• Application Number:
  US07/863,043
• Time in Patent Office: 3,462 Days
• Field of Search: 429/194, 429/217, 429/218, 429/232, 429/231.4, 429/324
• US Class Current: 429/231.4
• 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 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• 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 4/133 Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
• CPC Class Codes: H01M 4/505 of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• 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 4/587 for inserting or intercalating light metals
• 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 secondary battery with non-aqueous electrolyte having a high voltage and energy density and a superior cycle property, characterized in that a cathode comprises composite oxides containing lithium and an anode comprises composite carbon materials containing graphite spherical particles and carbon fibers. The carbon fiber improves the stiffness of the anode depolarizing mix to prevent the body made thereof from swelling and decomposing.

Claims

1. A secondary battery or cell with a non-aqueous electrolyte comprising:

a cathode containing composite oxides including lithium;

a non-aqueous electrolyte; and

an anode capable of being recharged repeatedly, said anode being a composite carbon material containing carbon fibers and graphite spherical particles, wherein said graphite spherical particles are mesocarbon microbeads.

2. The secondary battery or cell with a non-aqueous electrolyte according to claim 1, wherein said mesocarbon microbeads have a lameller structure and a lattice spacing (d002) of 3.36 to 3.42 Å

, measured by a wide angle X-ray diffraction method.

3. The secondary battery or cell with a non-aqueous electrolyte according to claim 1, wherein the carbon fiber content among the carbon material is from 5 wt. % to 20 wt. %.

4. The secondary battery or cell with a non-aqueous electrolyte according to claim 1, wherein the carbon fiber is selected from the group consisting of a vapor grown carbon fiber, a pitch carbon fiber and a PAN carbon fiber.