Alkali metal electrochemical cell with improved energy density
First Claim
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1. An electrochemical cell, which comprises:
- a) an anode comprising an anode active material;
b) a cathode operatively associated with the anode, wherein the cathode comprises a cathode active material; and
c) an electrolyte solution activating the anode and the cathode, wherein the anode active material and the cathode active material are present in the cell in an anode-to-cathode capacity ratio of about 1.03 and wherein the electrolyte and thecathode active material are present in the cell inan electrolyte-to-cathode weight ratio of about 0.94 to 0.96.
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Abstract
An alkali metal/solid cathode electrochemical cell, particularly a Li/CFx cell, having an electrolyte-to-cathode (E/C) weight ratio of about 0.94 to 0.96, and an anode-to-cathode (A/C) capacity ratio of about 1.03, is described. These ratios provide the cell with an improvement of about 6.7% in terms of volumetric energy density and about 11.9% in terms of gravimetric energy density over prior art Li/CFx cells.
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Citations
46 Claims
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1. An electrochemical cell, which comprises:
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a) an anode comprising an anode active material; b) a cathode operatively associated with the anode, wherein the cathode comprises a cathode active material; and c) an electrolyte solution activating the anode and the cathode, wherein the anode active material and the cathode active material are present in the cell in an anode-to-cathode capacity ratio of about 1.03 and wherein the electrolyte and the cathode active material are present in the cell in an electrolyte-to-cathode weight ratio of about 0.94 to 0.96. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An electrochemical cell, which comprises:
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a) an anode comprising lithium; b) a cathode operatively associated with the anode, wherein the cathode comprises fluorinated carbon as a cathode active material; and c) an electrolyte solution activating the anode and the cathode, the electrolyte solution comprising an ion-forming lithium salt dissolved in a nonaqueous solvent wherein the lithium and the fluorinated carbon are present in the cell in an anode-to-cathode capacity ratio of about 1.03 and wherein the electrolyte solution and the fluorinated carbon are present in the cell in an electrolyte-to-cathode weight ratio of about 0.94 to 0.96. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A method of providing an electrochemical cell, comprising the steps of:
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a) providing a casing; b) providing an anode comprising an anode active material; c) providing a cathode comprised of a cathode active material; d) operatively associating the anode with the cathode housed inside the casing with the anode active material and the cathode active material in an anode-to-cathode capacity ratio of about 1.03 and wherein the anode and the cathode are connected to respective terminals; and e) activating the anode and the cathode with an electrolyte filled into the casing, wherein the electrolyte and the cathode active material are present in the cell in an electrolyte-to-cathode weight ratio of about 0.94 to 0.96. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification