Method of making a thin layer electrochemical cell with self-formed separator
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 to self-form an interfacial separator layer between the pole layers upon such contacting.
1. An electrochemical cell comprising:
a positive pole layer comprising a positive active insoluble material;
a negative pole layer comprising a negative active insoluble material; and
at least one electrolyte solution, the electrolyte solution comprising:
a deliquescent material,
an electroactive material, and
an adhesive polymer; and
a separator layer comprising a gel or a polymer precipitate;
wherein the cell is sufficiently deliquescent for keeping the positive pole layer and negative pole layer wet and sufficiently electroactive for obtaining ionic conductivity between the positive pole layer and negative pole layer.
2. The electrochemical cell of claim 1 , wherein the separator layer is a self-formed separator.
3. The electrochemical cell of claim 1 , wherein the cell is an open cell.
4. The electrochemical cell of claim 1 , wherein the cell is a liquid state cell.
5. The electrochemical cell of claim 1 , wherein the cell is a thin layer cell.
6. The electrochemical cell of claim 1 , wherein the thickness of the separator layer is less than about 17 microns.
7. The electrochemical cell of claim 1 , wherein the
separator layer comprises a gel.
8. The electrochemical cell of claim 7 , wherein the separator is a self-formed separator and the electrochemical cell comprises no separately added separator.
9. The electrochemical cell of claim 7 wherein the cell is an open cell.
10. The electrochemical cell of claim 7 , wherein the cell is a liquid state cell.
11. The electrochemical cell of claim 7 , wherein the cell is a thin layer cell.
12. The electrochemical cell of claim 1 , wherein the separator layer comprises a polymer precipitate and the electrochemical cell comprises no separately added separator.
13. The electrochemical cell of claim 1 , wherein the separator layer does not include a separately added separator.
14. The electrochemical cell of claim 2 , wherein the self-formed separator layer comprises a product of an adhesive polymer.
15. The electrochemical cell of claim 2 , wherein the self-formed separator comprises a product of a component present in the positive pole layer and a component in the negative pole layer.
16. The electrochemical cell of claim 15 , wherein one of the components comprises a polymer and the other component comprises a polymer precipitating agent or an electrostatic cross-linking agent.
17. The electrochemical cell of claim 15 , wherein one of the components comprises a polymerizable unit and the other component comprises a polymerization activator.
18. The electrochemical cell of claim 15 , wherein one of the components comprises poly(vinyl pyrrolidone) (PVP) and the other component comprises zinc chloride.
19. The electrochemical cell of claim 2 , wherein the self-formed separator layer comprises a product of at least one of the group of: poly(vinyl pyrrolidone) (PVP), poly(acrylic acid), poly(vinyl alcohol), poly(ethylene oxide) and poly(ethyl oxazoline).
20. An electrochemical cell comprising:
a positive pole layer comprising a positive active insoluble material;
a negative pole layer comprising a negative active insoluble material; and
at least one electrolyte solution, the electrolyte solution comprising:
a deliquescent material,
an electroactive material, and
an adhesive polymer; and
a separator layer comprising a gel or a polymer precipitate, wherein the thickness of the separator layer is less than about 17 microns.