Method of making a thin layer electrochemical cell with self-formed separator

• US 7,491,465 B2
• Filed: 03/23/2005
• Issued: 02/17/2009
• Est. Priority Date: 03/23/2004
• Status: Expired due to Fees

• Current Assignee: Power Paper Ltd. (Products To Go, Inc.)
• Original Assignee: Power Paper Ltd. (Products To Go, Inc.)
• Inventors: Shchori, Ehud, Nitzan, Zvi, Jayes, Dalia, Luski, Shalom
• Primary Examiner(s): Kalafut; Stephen J.
• Application Number:
  US10/593,742
• Publication Number:
  US 20070190406A1
• Time in Patent Office: 1,427 Days
• Field of Search: 296/231, 296/233, 429/142, 429/162
• US Class Current: 429/142
• CPC Class Codes: H01M 10/0436 Small-sized flat cells or batteries for portable equipment
• CPC Class Codes: H01M 50/46 Separators, membranes or diaphragms characterised by their combination with electrodes
• CPC Class Codes: H01M 6/12 with flat electrodes
• 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
• CPC Class Codes: Y10T 29/49108 Electric battery cell making
• CPC Class Codes: Y10T 29/4911 including sealing
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

A method of forming an electrochemical cell is disclosed. The method comprises contacting a negative pole layer and a positive pole layer one with the other or with an optional layer interposed therebetween. The pole layers and the optional layer therebetween are selected so as to self-form an interfacial separator layer between the pole layers upon such contacting.

Claims

1. A method of forming a coplanar electrochemical cell, the method comprising:

(a) applying a layer of positive pole onto a first substrate;

(b) applying a layer of negative pole onto the first substrate in spaced relation and in the same plane as the positive pole;

(c) applying a layer of first electrolyte on and between the layers of spaced apart negative pole and positive pole, wherein the first electrolyte comprises at least one self-forming separator layer ingredient;

(d) applying a layer of second electrolyte on a second substrate, wherein the second electrolyte comprises at least one self-forming separator layer ingredient; and

(e) contacting the first substrate and the second substrate readily facilitating interaction between the at least one self-forming separator layer ingredient in the first substrate and second substrate layers to self-form an interfacial separator layer.

2. The method of claim 1, wherein said applying is done by a technique selected from the group consisting of printing, spraying, coating and dispensing and a combination thereof.

3. The method of claim 1, further comprising applying positive and negative current conductors.

4. The method of claim 1, further comprising applying a sealing ingredient onto at least one of the first and second substrates.

5. A method of forming an electrochemical cell, the method comprising contacting a first substrate with a second substrate, wherein the first substrate comprises (a) a negative pole and a positive pole in spaced relation and in the same plane as each other;

and (b) a first electrolyte; and

wherein the second substrate comprises a second electrolyte and wherein contacting the first substrate with the second substrate facilitates components in an electrolyte solution in the first substrate and components in an electrolyte solution in the second substrate to interact and/or react with each other and self-form an interfacial separator layer.

6. An electrochemical cell comprising:

a negative pole and a positive pole spaced apart and disposed in the same plane;

an electrolyte layer comprising a first electrolyte solution and a second electrolyte solution; and

an integral and in-situ formed interfacial separator layer interposed on and between the negative pole and the positive pole within the electrolyte layer,

wherein said integral and in-situ formed interfacial separator layer comprises a product of interaction and/or reaction of components in the first electrolyte solution disposed on and between the negative pole and the positive pole and components in the second electrolyte solution, and

wherein there is no separately added separator.

7. A coplanar electrochemical cell comprising

(a) a layer of positive pole and negative pole in spaced apart relation in the same plane;

(b) at least one electrolyte disposed on the layer of positive pole and negative pole and between the negative pole and the positive pole; and

(c) a self-formed separator, self-formed in situ.

8. The coplanar electrochemical cell of claim 7, further comprising a first substrate and a second substrate.

9. The coplanar electrochemical cell of claim 8, wherein the at least one electrolyte comprises a first electrolyte disposed on the first substrate and a second electrolyte disposed on the second substrate.

10. The coplanar electrochemical cell of claim 9, wherein the first electrolyte comprises a first self-formed separator ingredient, and the second electrolyte comprises a second self-formed separator ingredient, and wherein contact between the first and second substrates facilitates reaction and/or interaction between the first self-formed separator ingredient in the first electrolyte and the second self-formed separator ingredient in the second electrolyte to form the self-formed separator.

11. The coplanar electrochemical cell of claim 10, wherein the first self-formed separator ingredient is a polymer solution and the second self-formed separator ingredient is a polymer precipitating agent.

12. The coplanar electrochemical cell of claim 10, wherein the first self-formed separator ingredient is a polymer solution and the second self-formed separator ingredient is an electrostatic cross-linking agent.

13. The coplanar electrochemical cell of claim 10, wherein the first self-formed separator ingredient is a first polymer solution and the second self-formed separator ingredient is a second polymer solution.

14. The coplanar electrochemical cell of claim 10, wherein the first self-formed separator ingredient is a polymerizable unit and the second self-formed separator ingredient is a polymerization activator.

15. The coplanar electrochemical cell of claim 10, wherein the second electrolyte is disposed on the first electrolyte.

16. The coplanar electrochemical cell of claim 10, wherein the self-formed separator forms between the first electrolyte and the second electrolyte.

17. The coplanar electrochemical cell of claim 7, wherein the self-formed separator is a gel or polymer precipitate.