Lithium cell with improved cathode
View Patent ↗A primary lithium cell having an anode comprising lithium and a cathode comprising electrochemically active material selected from silver copper oxides having the formula AgCuO 2 or Ag 2 Cu 2 O 3 or mixtures thereof. The cathode can include a manganese dioxide in admixture with said silver copper oxides. The cell exhibits higher capacity and energy output than conventional lithium cells having an anode comprising lithium and cathode comprising manganese dioxide.
1. An electrochemical cell comprising a housing, a positive terminal, a negative terminal, an anode comprising lithium, a nonaqueous electrolyte and a cathode comprising a first cathode active material comprising manganese dioxide and a second cathode active material selected from the group consisting of AgCuO 2 , Ag 2 Cu 2 O 3 and mixtures thereof;
wherein the second cathode active material selected from the group consisting of AgCuO 2 , Ag 2 Cu 2 O 3 and mixtures thereof comprises between about 1-20 percent by weight of the cathode.
2. The cell of claim 1 wherein said cell is nonrechargeable.
3. The cell of claim 1 wherein said first cathode active material comprising manganese dioxide is heat treated to remove water therefrom.
4. The cell of claim 1 wherein said cathode further comprises a conductive carbon comprising graphite.
5. An electrochemical cell comprising a housing, a positive and a negative terminal, an anode comprising lithium, a cathode comprising AgCuO 2 , and a nonaqueous electrolyte.
6. The cell of claim 5 wherein the cell is nonrechargeable.
7. The cell of claim 5 wherein said cathode further comprises a manganese dioxide.
8. The cell of claim 7 wherein the AgCuO 2 comprises between about 1 and 20 percent by weight of cathode.
9. The cell of claim 5 wherein said cathode further comprises manganese dioxide heat treated to remove water therefrom.
10. The cell of claim 5 wherein said cathode further comprises a lithiated manganese dioxide.
11. The cell of claim 5 wherein said cathode further comprises a conductive carbon comprising graphite.
12. An electrochemical cell comprising a housing, a positive terminal, a negative terminal, an anode comprising lithium, a cathode comprising manganese dioxide and Ag 2 Cu 2 O 3 , and a nonaqueous electrolyte;
wherein the Ag 2 Cu 2 O 3 comprises between about 1-20 percent by weight of the cathode.
13. The cell of claim 12 wherein said cell is nonrechargeable.
14. The cell of claim 12 wherein said manganese dioxide is heat treated to remove water therefrom.
15. The cell of claim 12 wherein said manganese dioxide is a lithiated manganese dioxide.
16. The cell of claim 12 wherein said cathode further comprises a conductive carbon comprising graphite.