Multilayered electrolyte and electrochemical cells used same
First Claim
1. A multilayered electrolyte for use in an electrochemical cell, comprising:
- a primary electrolyte layer including at least a polymer substrate and an active ingredient impregnated therein; and
a secondary electrolyte disposed on at least one side of said layer of primary electrolyte wherein said secondary electrolyte is fabricated of a material different than said primary electrolyte.
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Accused Products
Abstract
A thin film multi-layered electrolyte for a rechargeable electrochemical cell, and a rechargeable electrochemical cell including said electrolyte. The multi-layered electrolyte consists of a primary electrolyte material having at least one secondary electrolyte material disposed on one surface thereof. The secondary electrolyte material should be selected so as to have a potential stability window sufficient to prevent decomposition of the primary electrolyte, while preventing chemical reactions leading to the formation of ionically non-conducting materials on the surface of the electrodes of the electrochemical cell. A rechargeable electrochemical cell is made by disposing the multi-layered electrolyte material between a positive and negative electrode.
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Citations
18 Claims
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1. A multilayered electrolyte for use in an electrochemical cell, comprising:
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a primary electrolyte layer including at least a polymer substrate and an active ingredient impregnated therein; and a secondary electrolyte disposed on at least one side of said layer of primary electrolyte wherein said secondary electrolyte is fabricated of a material different than said primary electrolyte. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A lithium polymer electrochemical cell, comprising:
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a lithium containing negative electrode; a positive electrode fabricated of a material having a high electrode potential versus lithium; and a multi-layered electrolyte operatively disposed between said negative and said positive electrodes, said multilayered electrolyte including a primary electrolyte layer and at least one secondary electrolyte layer, said primary electrolyte layer being fabricated of a material different than said secondary electrolyte layer. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14)
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15. A multilayered electrolyte for use in a rechargeable electrochemical cell including negative and positive electrodes, said multilayered electrolyte comprising:
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a primary electrolyte layer including at least a polymeric substrate having an active species impregnated therein; a first secondary electrolyte layer disposed between, and in contact with, said negative electrode and said primary electrolyte, said first secondary electrolyte layer being fabricated of a material which is different than said primary electrolyte, and which is chemically stable in the presence of said negative electrode; and a second secondary electrolyte layer disposed between, and in contact with, said positive electrode and said primary electrolyte, said second secondary electrolyte layer being fabricated of a material chemically stable at the operating potentials of said positive electrode, and said first and second secondary electrolytes being fabricated of different materials. - View Dependent Claims (16, 17, 18)
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Specification