"B" AND "O" SITE DOPED AB2O4 SPINEL CATHODE MATERIAL, METHOD OF PREPARING THE SAME, AND RECHARGEABLE LITHIUM AND Li-ION ELECTROCHEMICAL SYSTEMS CONTAINING THE SAME

摘要

A process for preparing a stable Group VIII Period 4 element (iron, cobalt, or nickel) “B” site and chlorine “O” site modified lithium manganese-based AB2O4 spinel cathode material is provided. The general formula of the “B” and “O” site modified lithium manganese-based AB2O4 spinel is LixMn2-yMyO4-z(Clz) where M is Fe, Co or Ni. In addition, a Group VIII Period 4 element (iron, cobalt, or nickel) “B” site and chlorine “O” site modified lithium manganese-based AB2O4 spinel cathode material is provided. Furthermore, a lithium or lithium ion rechargeable electrochemical cell is provided, incorporating the Group VIII Period 4 element (iron, cobalt, or nickel) “B” site and chlorine “O” site modified lithium manganese-based AB2O4 spinel cathode material in a positive electrode.

主权项

1. A method of preparing a homogeneously dispersed Group VIII Period 4 element and chlorine-modified lithium manganese based AB2O4 spinel cathode material, the method comprising:
dissolving a chlorine-containing salt, a nitrate of a Group VIII Period 4 element, manganese nitrate, and lithium nitrate to produce an aqueous solution; mixing the aqueous solution with a chelating agent to produce a mixture; heating the mixture to produce an ash; grinding the ash; and calcining the ground ash for a time period no greater than 5 hours at a temperature of at least 350° C. to produce the homogeneously dispersed Group VIII Period 4 element and chlorine-modified lithium manganese-based AB2O4 spinel cathode material.