Electrochemical cells with end-of-service indicator
AssigneeMedtronic, Inc.
InventorsDouglas J. Weiss, John W. Cretzmeyer, Ann M. Crespi, William G. Howard, Paul M. Skarstad
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Abstract
Non-aqueous cells employing an anode, such as lithium, a liquid organic electrolyte and a cathode comprising manganese dioxide (MnO.sub.2), carbon monofluoride (CF.sub.x) or mixtures of the two and an additive selected from the group consisting of vanadium oxide (V.sub.6 O.sub.13+y), silver vanadate (.beta.Ag.sub.x V.sub.2 O.sub.5, .delta.Ag.sub.x V.sub.2 O .sub.5 or Ag.sub.2 V.sub.4 O.sub.11), bismuth flouride (BiF.sub.3) and titanium sulfide (TiS.sub.2) as an end-of-service (EOS) indicator.
Claims11
A non-aqueous cell comprising:
- (a) an active metal anode;
- (b) a liquid organic electrolyte;
- and
- (c) a composite cathode, the composite cathode comprising a mixture of a first material selected from the group consisting of manganese dioxide, carbon monofluoride and mixtures thereof and a second material selected from the group consisting of V.sub.6 O.sub.13+y, .beta.Ag.sub.x V.sub.2 O.sub.5, .delta.Ag.sub.x V.sub.2 O.sub.5, Ag.sub.2 V.sub.4 O.sub.11, BiF.sub.3 and TiS.sub.2.
A cell exhibiting suppressed internal corrosion comprising:
- (a) a lithium metal anode;
- (b) a liquid organic electrolyte which includes gammabutyrolactone and LiBF.sub.4 ;
- and
- (c) a cathode material which includes V.sub.6 O.sub.13+y.
A cell exhibiting improved pulse voltage comprising:
- (a) an active metal anode;
- (b) a liquid organic electrolyte;
- and
- (c) a cathode comprised of CF.sub.x and V.sub.6 O.sub.13+y.
Dependencies are inferred from the claim text.