LITHIUM-TITANIUM COMPLEX OXIDE AND MANUFACTURING METHOD THEREOF, AS WELL AS BATTERY ELECTRODE AND LITHIUM ION SECONDARY BATTERY USING SAME
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United States of America Patent
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Issued Date -
May 2, 2013
app pub date -
Oct 17, 2012
filing date -
Nov 2, 2011
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Abandoned
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Abstract
A lithium-titanium complex oxide manufactured by the solid phase method is suitable as an active material for a lithium ion secondary battery. The lithium-titanium complex oxide is characterized in that (a) the average particle size D50 based on granularity distribution measurement by the laser diffraction method is 0.5 to 1.0 μm; (b) the maximum particle size D100 based on granularity distribution measurement by the laser diffraction method and maximum primary particle size d100 measured by observation using a scanning electron microscope have a ratio D100/d100 of 1.5 to 15; and (c) the equivalent sphere size DBET calculated from the specific surface area measured by the BET method and above D50 have a ratio D50/DBET of 3 to 7, and preferably the angle of repose is 35 to 50°.
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