Active material, electrode containing the active material, lithium secondary battery including the electrode, and method for making active material
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United States of America Patent
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Mar 31, 2015
Grant Date -
May 23, 2013
app pub date -
Jul 12, 2011
filing date -
Jul 16, 2010
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Abstract
To provide an active material from which a sufficient discharge capacity is obtained, an electrode containing the active material, a lithium secondary battery including the electrode, and a method for making an active material. A method for making an active material includes a temperature elevation step of heating a mixture containing a lithium source, a pentavalent vanadium source, a phosphoric acid source, water, and a reductant in a hermetically sealed container at a temperature elevation rate T1 from 25° C. to 110° C. and then at a temperature elevation rate T2 from 110° C. to a designated temperature of 200° C. or more, in which T1>T2; T1=0.5 to 10° C./min; and T2=0.1 to 2.2° C./min.
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