Metal oxide containing multiple dopants and method of preparing same
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United States of America Patent
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Jun 24, 2003
Grant Date -
N/A
app pub date -
May 30, 2000
filing date -
May 15, 1997
priority date (Note) -
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Abstract
The present invention relates to metal oxides containing multiple dopants. The metal oxides have the formula: LiM.sub.y-x [A].sub.x O.sub.z or M.sub.y-x [A].sub.x O.sub.z, wherein M is a transition metal, ##EQU1## wherein B.sub.i is an element used to replace the transition metal M and w.sub.i is the fractional amount of element B.sub.i in the total dopant combination such that ##EQU2## n is the total number of dopant elements used and is a positive integer of two or more, wherein the fractional amount w.sub.i of dopant element B.sub.i is determined by the relationship ##EQU3## E.sub.i is the oxidation state of dopant B.sub.i in the final product LiM.sub.y-x [A].sub.x O.sub.z or M.sub.y-x [A].sub.x O.sub.z, the dopant elements B.sub.i are cations in the intercalation compound, and the ratio of Li to O in the intercalation compound is not smaller than the ratio of Li to O in the undoped compound LiM.sub.y O.sub.z or M.sub.y O.sub.z. The present invention also includes methods of preparing same and specific embodiments of same.
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