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US09458016B2 Lithium iron phosphate having olivine structure and method for preparing the same 有权
具有橄榄石结构的磷酸铁锂及其制备方法

Lithium iron phosphate having olivine structure and method for preparing the same
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.
Abstract(Chinese):

本发明提供一种由平均粒径（D50）为5〜100μm的二次粒子组成的橄榄石型磷酸铁锂，其特征在于，其平均粒径（D50）为50〜550nm的一次粒子的聚集形成， 二次粒子具有下述式I所示的组成，二次粒子的孔隙率为15〜40％：Li1 + aFe1-xMx（PO4-b）Xb（I）其中M选自Al，Mg，Ni，Co ，Mn，Ti，Ga，Cu，V，Nb，Zr，Ce，In，Zn，Y及其组合; X选自F，S，N及其组合; -0.5≤a≤+ 0.5; 0≤x≤0.5; 0≤b≤0.1。

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