LITHIUM SECONDARY BATTERY ACTIVE MATERIAL AND LITHIUM SECONDARY BATTERY USING THE SAME
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United States of America Patent
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Issued Date -
Dec 20, 2012
app pub date -
Nov 25, 2010
filing date -
Nov 26, 2009
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Abandoned
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Abstract
A lithium secondary battery active material in which lithium titanate that can supply excellent rapid charge and discharge characteristics to a lithium secondary battery when used as a negative electrode active material of the lithium secondary battery is used, and a lithium secondary battery that is manufactured using the lithium secondary battery active material and is excellent in terms of, particularly, rapid charge and discharge characteristics. The lithium secondary battery active material of the invention is composed of lithium titanate which has a spinel structure, has a content of sulfate radicals of 100 ppm to 2500 ppm in terms of sulfur atoms and a content of chlorine of 1500 ppm or less, and is expressed by a general formula LixTiyO12 (however, in the formula, the atomic ratio of Li/Ti is 0.70 to 0.90, x satisfies 3.0≦x≦5.0, and y satisfies 4.0≦y≦6.0).
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