Intensification of ion exchange in lithium batteries

• US 4,816,357 A
• Filed: 11/25/1987
• Issued: 03/28/1989
• Est. Priority Date: 11/25/1987
• Status: Expired due to Fees

• Current Assignee: Lithium Battery, LLC, Majestic Hopes, LLC
• Original Assignee: Lithium Corporation
• Inventors: Hope, Stephen F., Hope, Henry F.
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US07/125,193
• Time in Patent Office: 489 Days
• Field of Search: 429/192, 429/191, 429/218, 429/212
• US Class Current: 429/312
• CPC Class Codes: H01M 4/12 of consumable metal or alloy electrodes use of alloy compositions as active materials H01M4/38
• CPC Class Codes: H01M 6/181 with polymeric electrolytes

Abstract

The contact area of the anode of lithium batteries with the electrolyte is substantially increased by deposition of minute lithium particles on the anode base layer to form an irregular layer in contact with the electrolyte which reduces the manufacturing cost and increases the contact area which increases the ion exchange between the lithium particles and the electrolyte.

Claims

1. In a solid-state lithium battery of the type comprising a lithium composite anode, a polymeric electrolyte, and a cathode, the improvement comprising:

an anode having a base metal layer,

a multiplicity of lithium particles on said base metal layer, a plurality of which are in fused adherent contact with said metal layer and all of which are in electrical and mechanical contact with each other, with spaces therebetween forming an irregular porous layer on said base metal layer for contact with said electrolyte whereby ion exchange therebetween is intensified.

2. The battery as described in claim 1 wherein

said lithium particles are formed by melting lithium to form micro particles which are discharged to be deposited on said base metal layer forming said anode.

3. The battery as described in claim 1 in which said particles are of spherical shape.

4. The battery as described in claim 1 in which said particles are of triangular shape.

5. The battery as described in claim 1 in which said particles are of square shape.

6. The battery as described in claim 1 in which said particles are of irregular shape.

7. The battery as described in claim 1 wherein

said base metal layer is nickel.