US 4,288,508 A · Chalcogenide electrochemical cell

Abstract

A battery is provided in which the anode contains an alkali metal in a high state of thermodynamic activity; the cathode comprises a partially alkali metal-intercalated chalcogenide of the formula A.sub.y MZ.sub.x wherein A is an alkali metal more electropositive and larger than the anode alkali metal, M is a transition metal of Group IV or V, x is a numerical value of from about 1.8 to about 2.1, y is a numerical value of from about 0.01 to about 1 and Z is sulfur, selenium or tellurium; and the electrolyte comprises ions of the anode metal in a medium which is compatible with the anode and cathode allowing transport of the ion from anode to intercalate into the cathode. In the discharged state the battery includes a cathode characterized by the presence of A'.sub.z A.sub.y MZ.sub.x in which A' is alkali metal more electronegative than A and z is a numerical value in the range 0<z.ltoreq.3.25.

Claims11

Dependent claims

An electrochemical cell in the charge state, said cell having a cathode-active material, an anode-active material and an electrolyte, wherein the cathode-active material is an alkali metal comprising a partially alkali metal intercalated dichalcogenide of the formula A.sub.y MZ.sub.x wherein

A is an alkali metal more electropositive than the anode active material;
M is at least one transition metal of Group IV or V;
Z is selenium, sulfur or tellurium;
y is a numerical value from about 0.01 to about 1;
x is a numerical value from about 1.8 to about 2.1;
and,
the anode-active material is an alkali metal.

4 more elements

Dependencies are inferred from the claim text.

Chalcogenide electrochemical cell

Life of this patent

Chalcogenide electrochemical cell

Life of this patent

Abstract

Claims11