Electrode active material and polymer electrolyte matrix composition for lithium ion polymer battery

• US 6,372,386 B1
• Filed: 08/09/1999
• Issued: 04/16/2002
• Est. Priority Date: 11/05/1998
• Status: Expired due to Term

• Current Assignee: Samsung Display Devices Co., Ltd. (Samsung SDI Company Limited)
• Original Assignee: Samsung Display Devices Co., Ltd. (Samsung SDI Company Limited)
• Inventors: Roh, Whan-jin, Cho, Hun-goo
• Primary Examiner(s): Kalafut, Stephen
• Assistant Examiner(s): Mercado, Julian A.
• Application Number:
  US09/370,214
• Time in Patent Office: 981 Days
• Field of Search: 429/212, 429/231.95, 429/231.9, 429/213, 429/218.1, 429/216
• US Class Current: 429/231.95
• 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 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 4/0409 by a doctor blade method, slip-casting or roller coating
• 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 4/139 Processes of manufacture
• CPC Class Codes: H01M 4/621 Binders
• 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

An electrode active material composition containing a pyrolytic plasticizer, a polymer electrolytic matrix composition and a preparation method of a lithium ion polymer battery using the same are provided. Since a separate plasticizer extraction step using an organic solvent is not necessary, the preparation cost is reduced and the preparation process can be kept clean. In particular, since a uniform porosity plate can be fabricated after removing the plasticizer, a lithium ion polymer battery with improved high-rate charge and discharge characteristics can be prepared.

Claims

1. An electrode active material composition for a lithium ion polymer battery having an electrode active material, a conductive agent, a plasticizer, a binder, and a deflocculation agent, wherein the plasticizer is a pyrolytic plasticizer and the content thereof is in the range of 5 to 30% by weight based on the total weight of the electrode active material composition.

2. The electrode active material composition for a lithium ion polymer battery of claim 1, wherein the pyrolytic plasticizer is ammonium bicarbonate, an alkali metal carbonate, or an alkali earth metal carbonate.

3. The electrode active material composition for a lithium ion polymer battery of claim 1, wherein the pyrolytic plasticizer is at least one selected from the group consisting of ammonium bicarbonate, sodium hydrogencarbonate (NaHCO₃), potassium hydrogencarbonate (KHCO₃), lithium hydrogencarbonate (LiHCO₃), lithium carbonate (Li₂CO₃), and calcium carbonate (CaCO₃).

4. The electrode active material composition for a lithium ion polymer battery of claim 1, wherein the deflocculation agent is sodium molybdate.

5. A polymer electrolyte matrix composition having a polymer resin, a plasticizer, and a deflocculation agent, wherein the plasticizer is a pyrolytic plasticizer and the content thereof is in the range of 10 to 60% by weight based on the total weight of the polymer electrolyte matrix composition.

6. The polymer electrolyte matrix composition of claim 5, wherein the pyrolytic plasticizer is ammonium bicarbonate, an alkali metal carbonate, or an alkali earth metal carbonate.

7. The polymer electrolyte matrix composition of claim 5, wherein the pyrolytic plasticizer is at least one selected from the group consisting of ammonium bicarbonate, sodium hydrogencarbonate (NaHCO₃), lithium hydrogencarbonate (LiHCO₃), potassium hydrogencarbonate (KHCO₃), lithium carbonate (Li₂CO₃), and calcium carbonate (CaCO₃).

8. The polymer electrolyte matrix composition of claim 5, wherein the deflocculation agent is sodium molybdate.

9. An electrode active material composition for a lithium ion polymer battery having an electrode active material, a conductive agent, a pyrolitic plasticizer, a binder, and a deflocculation agent, wherein the pyrolytic plasticizer is at least one selected from the group consisting of ammonium bicarbonate, sodium hydrogencarbonate (NaHCO₃), potassium hydrogencarbonate (KHCO₃), lithium hydrogencarbonate (LiHCO₃), and calcium carbonate (CaCO₃) and wherein the content of the pyrolytic plasticizer is in the range of 5 to 30% by weight based on the total weight of the electrode active material composition.

10. The electrode active material composition for a lithium ion polymer battery according to claim 9, wherein the deflocculation agent is sodium molybdate.

11. A polymer electrolyte matrix composition having a polymer resin, a pyrolytic plasticizer, and a deflocculation agent, wherein the pyrolytic plasticizer is at least one selected from the group consisting of ammonium bicarbonate, sodium hydrogencarbonate (NaHCO₃), lithium hydrogencarbonate (LiHCO₃), potassium hydrogencarbonate (KHCO₃), and calcium carbonate (CaCO₃), and wherein the content of the pyrolytic plasticizer is in the range of 10 to 60% by weight based on the total weight of the polymer electrolyte matrix composition.

12. The polymer electrolyte matrix composition according to claim 11, wherein the deflocculation agent is sodium molybdate.