Electrolytes for low impedance, wide operating temperature range lithium-ion battery module
First Claim
1. A lithium ion battery cell, comprising:
- a housing;
a cathode disposed within the housing, wherein the cathode comprises a cathode active material;
an anode disposed within the housing, wherein the anode comprises an anode active material; and
an electrolyte disposed within the housing and in contact with the cathode and anode, wherein the electrolyte consists essentially of;
a solvent mixture comprising a cyclic carbonate, a first non-cyclic carbonate, a second non-cyclic carbonate, and a linear ester;
a lithium salt in a concentration ranging from approximately 1.0 molar (M) to approximately 1.6M; and
an additive mixture consisting essentially of lithium difluoro(oxalato)borate (LiDFOB) in an amount ranging from approximately 0.5 wt % to approximately 2.0 wt % based on the weight of the electrolyte, and vinylene carbonate (VC) in an amount ranging from approximately 0.5 wt % to approximately 2.0 wt % based on the weight of the electrolyte,wherein the solvent mixture consists essentially of;
the cyclic carbonate in an amount between approximately 5 vol % and approximately 30 vol % based on the total volume of the solvent mixture;
wherein the first and second non-cyclic carbonates together represent between approximately 50 vol % and approximately 80 vol % of the total volume of the solvent mixture; and
the linear ester in an amount between approximately 5 vol % and approximately 20 vol %, based on the total volume of the solvent mixture, wherein the volume percentage of the cyclic carbonate is greater than or approximately equal to the volume percentage of the linear ester.
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Accused Products
Abstract
A lithium ion battery cell includes a housing, a cathode disposed within the housing, wherein the cathode comprises a cathode active material, an anode disposed within the housing, wherein the anode comprises an anode active material, and an electrolyte disposed within the housing and in contact with the cathode and anode. The electrolyte consists essentially of a solvent mixture, a lithium salt in a concentration ranging from approximately 1.0 molar (M) to approximately 1.6 M, and an additive mixture. The solvent mixture includes a cyclic carbonate, an non-cyclic carbonate, and a linear ester. The additive mixture consists essentially of lithium difluoro(oxalato)borate (LiDFOB) in an amount ranging from approximately 0.5 wt % to approximately 2.0 wt % based on the weight of the electrolyte, and vinylene carbonate (VC) in an amount ranging from approximately 0.5 wt % to approximately 2.0 wt % based on the weight of the electrolyte.
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Citations
21 Claims
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1. A lithium ion battery cell, comprising:
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a housing; a cathode disposed within the housing, wherein the cathode comprises a cathode active material; an anode disposed within the housing, wherein the anode comprises an anode active material; and an electrolyte disposed within the housing and in contact with the cathode and anode, wherein the electrolyte consists essentially of; a solvent mixture comprising a cyclic carbonate, a first non-cyclic carbonate, a second non-cyclic carbonate, and a linear ester; a lithium salt in a concentration ranging from approximately 1.0 molar (M) to approximately 1.6M; and an additive mixture consisting essentially of lithium difluoro(oxalato)borate (LiDFOB) in an amount ranging from approximately 0.5 wt % to approximately 2.0 wt % based on the weight of the electrolyte, and vinylene carbonate (VC) in an amount ranging from approximately 0.5 wt % to approximately 2.0 wt % based on the weight of the electrolyte, wherein the solvent mixture consists essentially of; the cyclic carbonate in an amount between approximately 5 vol % and approximately 30 vol % based on the total volume of the solvent mixture; wherein the first and second non-cyclic carbonates together represent between approximately 50 vol % and approximately 80 vol % of the total volume of the solvent mixture; and the linear ester in an amount between approximately 5 vol % and approximately 20 vol %, based on the total volume of the solvent mixture, wherein the volume percentage of the cyclic carbonate is greater than or approximately equal to the volume percentage of the linear ester. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A lithium ion battery cell, comprising:
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a housing; a cathode disposed within the housing, wherein the cathode comprises a cathode active material; an anode disposed within the housing, wherein the anode comprises an anode active material; and an electrolyte disposed within the housing and in contact with the cathode and anode, wherein the electrolyte comprises a solvent mixture, a lithium salt in a concentration ranging from approximately 1.0 molar (M) to approximately 1.6 M, and lithium difluoro(oxalato)borate (LiDFOB) in an amount ranging from approximately 0.5 wt % to approximately 2.0 wt % based on the weight of the electrolyte; and wherein the solvent mixture consists essentially of fluoroethylene carbonate (FEC) in an amount between approximately 5 vol % and approximately 30 vol % based on the total volume of the solvent mixture, a non-cyclic carbonate in an amount between approximately 5 vol % and approximately 30 vol % based on the total volume of the solvent mixture, and a linear ester in an amount between approximately 50 vol % and approximately 70 vol % based on the total volume of the solvent mixture. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A lithium ion battery cell, comprising:
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a housing; a cathode disposed within the housing, wherein the cathode comprises a cathode active material; an anode disposed within the housing, wherein the anode comprises a titanate-based active material; and an electrolyte disposed within the housing and in contact with the cathode and anode, wherein the electrolyte comprises a solvent mixture, a lithium salt in a concentration ranging from approximately 1.0 molar (M) to approximately 1.6 M, and lithium difluoro(oxalato)borate (LiDFOB) in an amount ranging from approximately 0.5 wt % to approximately 2.0 wt % based on the weight of the electrolyte; wherein the solvent mixture consists essentially of propylene carbonate (PC) in an amount between approximately 5 vol % and approximately 30 vol % based on the total volume of the solvent mixture, a first non-cyclic carbonate and a second non-cyclic carbonate, wherein the first and second non-cyclic carbonates together represent between approximately 50 vol % and approximately 80 vol % of the total volume of the solvent mixture, and a linear ester in an amount between approximately 5 vol % and approximately 20 vol % based on the total volume of the solvent mixture, wherein the volume percentage of the PC is greater than or approximately equal to the volume percentage of the linear ester. - View Dependent Claims (19, 20, 21)
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Specification