Packaging material for electrochemical cells
AssigneeRutgers, The State University of New Jersey
InventorsGlenn G. Amatucci, Anna B. Halajko, Linda Wu Sung, Anthony Ferrer
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Abstract
The described invention relates to the use of parylene and composites of parylene as a flexible, sealable, and near hermetic barrier packaging material for nonaqueous electrochemical cells. Additionally, the invention relates to the technique of sealing of battery packaging material through the use of ultrasonic energy, and to the use of a low melting temperature inorganic barrier, which is predisposed between higher melting temperature polymer layers, that can be sealed to form a truly hermetic barrier at the interface.
Claims12
A method comprising:
- obtaining an electrochemical cell;
- forming a first sheet of packaging material;
- wherein the first sheet of packaging material comprises a first layer of para-xylylene polymer;
- forming a second sheet of packaging material;
- wherein the second sheet of packaging material comprises a second layer of para-xylylene polymer;
- bonding the first layer of para-xylylene polymer of the first sheet to the second layer of para-xylylene polymer of the second sheet using ultrasonic energy to form a bonded sheet;
- bonding the first layer of para-xylylene polymer to a third layer of first metal to form the first sheet of packaging material;
- bonding the second layer of para-xylylene polymer to a fourth layer of second metal to form the second sheet of packaging material;
- forming a free-standing package using the bonded sheet;
- encapsulating the electrochemical cell in the free-standing package;
- wherein the electrochemical cell comprises an anode, a cathode, and an electrolyte in contact with the anode and the cathode, wherein the first layer of para-xylylene polymer and the second layer of para-xylylene polymer are in contact with the electrolyte.
A method comprising:
- forming a first sheet of packaging material;
- wherein the first sheet of packaging material comprises a first layer of para-xylylene polymer;
- forming a second sheet of packaging material;
- wherein the second sheet of packaging material comprises a second layer of para-xylylene polymer;
- bonding the first layer of para-xylylene polymer of the first sheet to the second layer of para-xylylene polymer of the second sheet using ultrasonic energy to form a bonded sheet;
- bonding the first layer of para-xylylene polymer to a third layer of first metal to form the first sheet of packaging material;
- bonding the second layer of para-xylylene polymer to a fourth layer of second metal to form the second sheet of packaging material;
- forming a free-standing package using the bonded sheet,
- wherein the free-standing package is configured to encapsulate an electrochemical cell comprising an anode, a cathode, and an electrolyte in contact with the anode and the cathode, wherein the first layer of para-xylylene polymer and the second layer of para-xylylene polymer are in contact with the electrolyte.
Dependencies are inferred from the claim text.