NEW HIGH CAPACITY CATHODE MATERIAL WITH IMPROVED OPERATING VOLTAGE

摘要

The present invention relates to an electrochemical cell comprising an anode of a Group IA metal and a cathode of a composite material prepared from an aqueous mixture of iron sulfate, nickel sulfate, and sulfur. The cathode material of the present invention provides for a lithium electrochemical cell having an increased operating voltage and power performance with high discharge capacity as compared to a lithium cell comprising nickel disulfide cathode material. In addition, the cathode material of the present invention exhibits a smaller initial irreversible voltage loss as compared to iron disulfide. This makes the cathode material of the present invention particularly useful for implantable medical applications.

主权项

1. An electrochemical cell, comprising:
a) an anode of a Group IA metal which is electrochemically oxidizable to form metal ions in the cell upon discharge to generate an electron flow in an external electrical circuit electrically connected to the cell; b) a cathode of electrically conductive material, wherein the cathode comprises a metal matrix material comprising a first metal salt comprising iron, a second metal salt comprising nickel, and sulfur; and c) an ionically conductive electrolyte solution activating the anode and the cathode.