Lithium iron phosphate having olivine structure and method for preparing the same
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United States of America Patent
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Oct 4, 2016
Grant Date -
Sep 16, 2010
app pub date -
Feb 19, 2010
filing date -
Oct 22, 2008
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Abstract
Provided is an olivine-type lithium iron phosphate composed of secondary particles having a mean particle diameter (D50) of 5 to 100 μm, formed by aggregation of primary particles having a mean particle diameter (D50) of 50 to 550 nm, wherein the primary and secondary particles have a composition represented by Formula I below and the secondary particles have a porosity of 15 to 40%: Li1+aFe1−xMx(PO4−b)Xb (I) wherein M is selected from Al, Mg, Ni, Co, Mn, Ti, Ga, Cu, V, Nb, Zr, Ce, In, Zn, Y and combinations thereof; X is selected from F, S, N and combinations thereof; −0.5≦a≦+0.5; 0≦x≦0.5; and 0≦b≦0.1.
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