Thin film battery

• US 20040018424A1
• Filed: 07/26/2002
• Published: 01/29/2004
• Est. Priority Date: 07/26/2002
• Status: Active Grant

• Current Assignee: Johnson Ip Holding Llc
• Original Assignee: Excellatron Solid State, LLC
• Inventors: Buckingham, Steve, Zhang, Ji-Guang, Johnson, Lonnie G.
• Granted Patent: US 6,835,493 B2
• Time in Patent Office: Days
• US Class Current: 429/162
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 10/0585 of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
• CPC Class Codes: H01M 4/38 of elements or alloys
• CPC Class Codes: H01M 4/485 of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy H01M4/505, H01M4/525 take precedence
• CPC Class Codes: H01M 6/40 Printed batteries , e.g. thin film batteries
• 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 rechargeable, thin film lithium battery cell (10) is provided having a polyimide supporting substrate (11), a cathode current collector (13), a lithiated transition metal oxide or transition metal cathode (14), an electrolyte (15), an anode (16) and an anode current collector (17). The polyimide supporting substrate (11) is heated or dehydrated to remove water from therein. The cathode (14) is annealed at a relatively low temperature of approximately 300 degrees Celsius.

Claims

1. A thin film lithium battery comprising:

a polyimide support substrate;

a cathode current collector mounted upon said polyimide support substrate;

a crystallized lithium intercalation compound cathode coupled to said cathode current collector;

an electrolyte deposited upon said lithium intercalation compound cathode;

an anode deposited upon said electrolyte; and

an anode current collector coupled to said anode.

2. The thin film lithium battery of claim 1 wherein said polyimide support substrate is a dehydrated polyimide material.

3. The thin film lithium battery of claim 1 wherein said polyimide support substrate of a poly(pyromellitimide-1, 4-diphenyl ether) material.

4. The thin film lithium battery of claim 3 wherein said polyimide support substrate is a dehydrated polyimide material.

5. The thin film lithium battery of claim 1 further comprising a passivation layer is positioned between said polyimide support substrate and said crystallized lithium intercalation compound cathode.

6. The thin film lithium battery of claim 5 wherein said passivation layer is a parylene material.

7. The thin film lithium battery of claim 5 wherein said passivation layer is a lithium phosphorus oxynitride material.

8. A thin film lithium battery comprising:

a polyimide support substrate;

a passivation layer deposited upon said polyimide support substrate;

a cathode current collector mounted upon said passivation layer;

a crystallized lithium intercalation compound cathode coupled to said cathode current collector;

an electrolyte deposited upon said lithium intercalation compound cathode;

an anode deposited upon said electrolyte; and

an anode current collector coupled to said anode.

9. The thin film lithium battery of claim 8 wherein said polyimide support substrate is a dehydrated polyimide material.

10. The thin film lithium battery of claim 8 wherein said polyimide support substrate of a poly(pyromellitimide-1, 4-diphenyl ether) material.

11. The thin film lithium battery of claim 10 wherein said polyimide support substrate is a dehydrated polyimide material.

12. The thin film lithium battery of claim 8 wherein said passivation layer is a parylene material.

13. The thin film lithium battery of claim 8 wherein said passivation layer is a lithium phosphorus oxynitride material.