Seal for reactive metal anode
First Claim
1. A seal for a reactive metal anode of an electrochemical cell comprising said anode, a cathode, and an electrolyte in which said anode and said cathode are in contact during operation of said cell, said anode defining a first surface which contacts said electrolyte and at least one additional surface at the perimeter of at least a portion of said first surface, said seal comprising a coating on said additional surface of a hydrophobic polymer which is substantially chemically inert with respect to said reactive metal and said electrolyte and wherein:
- (a) the ratio of the flexural modulus to the flexural strength of said polymer is at least about 25;
(b) the Izod impact value of said polymer is less than or equal to about 2.0 ft.-lb./in.; and
,(c) the percent elongation of said polymer is less than or equal to about 20%.
2 Assignments
0 Petitions
Accused Products
Abstract
An edge seal for a lithium or other consumable metal anode comprises a hydrophobic, chemically inert polymer coating having a high ratio of flexural modulus to flexural strength, a low Izod impact value, and low elongation properties.
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Citations
22 Claims
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1. A seal for a reactive metal anode of an electrochemical cell comprising said anode, a cathode, and an electrolyte in which said anode and said cathode are in contact during operation of said cell, said anode defining a first surface which contacts said electrolyte and at least one additional surface at the perimeter of at least a portion of said first surface, said seal comprising a coating on said additional surface of a hydrophobic polymer which is substantially chemically inert with respect to said reactive metal and said electrolyte and wherein:
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(a) the ratio of the flexural modulus to the flexural strength of said polymer is at least about 25; (b) the Izod impact value of said polymer is less than or equal to about 2.0 ft.-lb./in.; and
,(c) the percent elongation of said polymer is less than or equal to about 20%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electrochemical cell comprising a reactive metal anode, a cathode, and an electrolyte in which said anode and said cathode are in contact during operation of said cell, said anode defining a first surface which contacts said electrolyte and at least one additional surface at the perimeter of at least a portion of said first surface, and a seal on said additional surface comprising a coating of a hydrophobic polymer which is substantially chemically inert with respect to said reactive metal and said electrolyte and wherein:
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(a) the ratio of the flexural modulus to the flexural strength of said polymer is at least about 25; (b) the Izod impact value of said polymer is less than or equal to about 2.0 ft.-lb./in.; and
,(c) the percent elongation of said polymer is less than or equal to about 20%. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification