Method of forming an anode material for lithium-containing solid electrochemical cells

• US 5,366,829 A
• Filed: 06/14/1993
• Issued: 11/22/1994
• Est. Priority Date: 06/14/1993
• Status: Expired due to Fees

• Current Assignee: Valence Technology Incorporated (Lithium Werks B.V.)
• Original Assignee: Valence Technology Incorporated (Lithium Werks B.V.)
• Inventors: Saidi, Eileen S.
• Primary Examiner(s): Maples, John S.
• Application Number:
  US08/077,489
• Time in Patent Office: 526 Days
• Field of Search: 429/215, 429/216, 429/212, 252/182.1
• US Class Current: 429/212
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0565 Polymeric materials, e.g. gel-type or solid-type
• CPC Class Codes: H01M 2004/027 Negative electrodes
• CPC Class Codes: H01M 2300/0082 Organic polymers
• CPC Class Codes: H01M 4/04 Processes of manufacture in general
• CPC Class Codes: H01M 4/0402 Methods of deposition of the material
• CPC Class Codes: H01M 4/0404 by coating on electrode collectors
• CPC Class Codes: H01M 4/0411 by extrusion
• CPC Class Codes: H01M 4/0416 involving impregnation with a solution, dispersion, paste or dry powder H01M4/0438 takes precedence
• CPC Class Codes: H01M 4/043 involving compressing or compaction
• CPC Class Codes: H01M 4/0435 Rolling or calendering
• 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 4/137 Electrodes based on electro-active polymers
• CPC Class Codes: H01M 4/366 as layered products
• CPC Class Codes: H01M 4/38 of elements or alloys
• CPC Class Codes: H01M 4/405 Alloys based on lithium
• CPC Class Codes: H01M 4/602 Polymers
• CPC Class Codes: H01M 4/661 Metal or alloys, e.g. alloy coatings H01M4/669 take precedence
• CPC Class Codes: H01M 50/46 Separators, membranes or diaphragms characterised by their combination with electrodes
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10S 428/931 : Components of differing electric conductivity
• CPC Class Codes: Y10T 428/258 : Alkali metal or alkaline earth metal or compound thereof
• CPC Class Codes: Y10T 428/264 : Up to 3 mils
• CPC Class Codes: Y10T 428/265 : 1 mil or less
• CPC Class Codes: Y10T 428/31681 : Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
• CPC Class Codes: Y10T 428/31692 : Next to addition polymer from unsaturated monomers
• CPC Class Codes: Y10T 428/31855 : Of addition polymer from unsaturated monomers

Abstract

This invention is directed to lithium and lithium alloy metal substrates, coated with a polymeric layer containing dispersed lithium or lithium alloy metal particles. The coated metal finds use as anode material in solid electrochemical cells. A method of forming the same is disclosed.

Claims

1. A method of making a lithium anode material for solid electrochemical cells comprising the steps of:

dispersing particles of lithium or lithium alloy metal in a polymer precursor composition;

coating a lithium or lithium alloy metal surface with said polymer precursor composition; and

partially or totally curing said polymer precursor composition.

2. The method according to claim 6 wherein said curing is carried out by exposing said polymer precursor composition to ultraviolet light or an electron beam.

3. A method of making a lithium anode material for solid electrochemical cells comprises the steps of:

dispersing particles of lithium or lithium alloy metal in a melt or solution of intrinsically conductive polymer to form a coating composition;

coating a lithium or lithium alloy metal surface with said composition; and

permitting said composition to form a solid polymeric layer on said lithium or lithium alloy metal surface.