Electrode materials suitable for lithium-ion electrochemical cells

• US 5,891,593 A
• Filed: 10/22/1996
• Issued: 04/06/1999
• Est. Priority Date: 10/31/1995
• Status: Expired due to Fees

• Current Assignee: BASF AG (BASF SE)
• Original Assignee: Emtec Magnetics GmbH (Glassbridge Enterprises, Inc.)
• Inventors: Heil, Gunter, Steininger, Helmut, Blum, Rainer, Keller, Harald, Bronstert, Bernd
• Primary Examiner(s): Maples, John S.
• Application Number:
  US08/735,109
• Time in Patent Office: 896 Days
• Field of Search: 429/217, 429/218
• US Class Current: 429/217
• 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 4/525 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: H01M 4/621 Binders
• CPC Class Codes: H01M 4/622 being polymers
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

Electrode materials suitable for electrochemical cells containing a) a polymeric binder which is composed essentially of polyisobutene having a limiting viscosity number of from 551 to 661 g/cm³ and b) a solid which is capable of reversibly taking up or releasing lithium ions in an electrochemical reaction.

Claims

1. A secondary lithium-ion electrochemical cell containing an electrode material I comprising

a) a polymeric binder II which is composed essentially of polyisobutene having a limiting viscosity number of from 551 to 661 g/cm³ and

b) a solid III which is capable of reversibly taking up or releasing lithium ions in an electrochemical reaction.

2. The cell as defined in claim 1, containing carbon as compound III.

3. The cell as defined in claim 1, containing, as compound III, a mixed oxide containing Mn, Co, Ni, Fe or Mo ions and lithium ions.

4. The cell as defined in claim 1, containing a polyether IV.

5. The cell as defined in claim 1 comprising an electrode containing the electrode material I.