Non-aqueous electrolyte secondary cell with a lithium cobalt oxide positive electrode
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United States of America Patent
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Feb 18, 2003
Grant Date -
Nov 1, 2001
app pub date -
Feb 14, 2001
filing date -
Mar 31, 2000
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Abstract
In a non-aqueous electrolyte secondary cell having a positive electrode mainly composed of a positive electrode active material, a negative electrode, and a non-aqueous electrolyte, the positive electrode active material includes a lithium-containing transition metal complex oxide represented with hexagonal structure by the general formula LiCo.sub.1-X M.sub.X O.sub.2, wherein M is at least one element selected from the group consisting of V, Cr, Fe, Mn, Ni, Al, and Ti, and a crystallite size (110) of the lithium-containing transition metal complex oxide is greater than 1000 .ANG.. Thereby, the thermal stability of the positive electrode active material is increased, and the discharge characteristic and the charge-discharge characteristic of the cell are improved.
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