Electrochemical cells
First Claim
Patent Images
1. An electrochemical cell comprising an oxidizable active anode material;
- a cathode material; and
an electrolytic solution between and in contact with said anode and said cathode, said electrolytic solution comprising an inorganic solvent material and a solute dissolved therein;
said solvent material being electrochemically reduced upon the surface of said cathode material during discharge of said cell whereby elemental sulfur is formed as one of the reaction products;
said electrolytic solution further including an additive in sufficient amount to dissolve all of said elemental sulfur which is formed during operation of said cell.
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Abstract
Electrochemical cells having an oxidizable anode material, such as lithium, a cathode material, such as carbon or (C4 F)n, upon the surface of which the solvent material is electrochemically reduced during operation of the cell, and an electrolytic solution comprising an inorganic solvent and a solute dissolved therein. The electrolytic solution further contains an additive such as sulfur monochloride (S2 Cl2), which is capable of dissolving any sulfur generated during operation of the cell and which is unreactive with the other components of the cell.
7 Citations
24 Claims
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1. An electrochemical cell comprising an oxidizable active anode material;
- a cathode material; and
an electrolytic solution between and in contact with said anode and said cathode, said electrolytic solution comprising an inorganic solvent material and a solute dissolved therein;
said solvent material being electrochemically reduced upon the surface of said cathode material during discharge of said cell whereby elemental sulfur is formed as one of the reaction products;
said electrolytic solution further including an additive in sufficient amount to dissolve all of said elemental sulfur which is formed during operation of said cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a cathode material; and
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11. An electrochemical cell comprising a lithium anode;
- a carbon cathode;
an electrolytic solution between and in contact with said anode and said cathode, said electrolytic solution including a solvent material selected from the group consisting of thionyl chloride, sulfuryl chloride, mixtures thereof, and mixtures thereof with phosphorus oxychloride, and a solute dissolved therein;
said solvent material being electrochemically reduced upon the surface of said cathode during discharge of said cell whereby elemental sulfur is formed as one of the reaction products of said discharge;
said electrolytic solution further including an additive in sufficient amount to dissolve all of said elemental sulfur which is formed during operation of said cell. - View Dependent Claims (12)
- a carbon cathode;
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13. The electrochemical cell of claim 13 wherein said carbon cathode material is present in said electrolytic solution which is in paste form, said cell further including an inert cathode current collector.
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14. An electrochemical cell comprising a lithium anode;
- a (C4 F)n cathode, wherein n refers to the presence of a large, but indefinite, number of recurring (C4 F) groups in said cathode material; and
an electrolytic solution between and in contact with said anode and said cathode, said electrolytic solution including a solvent material selected from the group consisting of thionyl chloride, sulfuryl chloride, mixtures thereof and mixtures thereof with phosphorus oxychloride, and a solute dissolved therein;
said solvent material being electrochemically reduced upon the surface of said cathode during discharge of said cell whereby elemental sulfur is formed as one of the reaction products of said discharge;
said electrolytic solution further including an additive in sufficient amount to dissolve all of said elemental sulfur which is formed during operation of said cell. - View Dependent Claims (15)
- a (C4 F)n cathode, wherein n refers to the presence of a large, but indefinite, number of recurring (C4 F) groups in said cathode material; and
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16. An electrochemical cell comprising an oxidizable active anode material;
- a cathode material; and
an electrolytic solution between and in contact with said anode material and said cathode material, said electrolytic solution comprising an inorganic solvent material and a solute dissolved therein;
said solvent material being electrochemically reduced upon the surface of said cathode material during discharge of said cell whereby elemental sulfur is formed as one of the reaction products;
said electrolytic solution further including sulfur monochloride in sufficient amount to dissolve all of said elemental sulfur formed during operation of said cell. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
- a cathode material; and
Specification