Multiple-doped oxide cathode material for secondary lithium and lithium-ion batteries
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 21, 2000
Grant Date -
N/A
app pub date -
Feb 27, 1998
filing date -
Feb 28, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides a positive electrode material for lithium and lithium-ion secondary cells which exhibits good cycleability, reversible specific capacity, and structural stability. The positive electrode material comprises a lithium multi metal oxide having a spinel structure and described by the general formula: Li.sub.1+X Mn.sub.2-Y M.sub.m.sbsb.1.sup.1 M.sub.m.sbsb.2.sup.2 . . . M.sub.m.sbsb.k.sup.k O.sub.4+Z wherein M.sup.1, M.sup.2, . . . M.sup.k are at least two cations different than lithium or manganese, selected from the group consisting of alkaline earth metals, transition metals, B, Al, Si, Ga and Ge; X, Y, m.sub.1,m.sub.2, . . . m.sub.k are numbers between 0 and 0.2; m.sub.1, m.sub.2 and Y are greater than 0; Z is a number between -0.1 and 0.2; and wherein the metals M.sup.1, M.sup.2, . . . M.sup.k and the corresponding values m.sub.1, m.sub.2, . . . m.sub.k satisfy the following equation and inequality: ##EQU1## wherein V.sub.1, V.sub.2, . . . V.sub.k are the corresponding valence states of the cations M.sup.1, M.sup.2, . . . M.sup.k.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully