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MULTI-ELEMENT LITHIUM PHOSPHATE COMPOUND PARTICLES HAVING OLIVINE STRUCTURE, METHOD FOR PRODUCING SAME, AND LITHIUM SECONDARY BATTERY USING SAME IN POSITIVE ELECTRODE MATERIAL
MULTI-ELEMENT LITHIUM PHOSPHATE COMPOUND PARTICLES HAVING OLIVINE STRUCTURE, METHOD FOR PRODUCING SAME, AND LITHIUM SECONDARY BATTERY USING SAME IN POSITIVE ELECTRODE MATERIAL
There is disclosed a multi-component system lithium phosphate compound particles having an olivine structure and represented by a general formula of Li Y M1 1-Z M2 Z PO 4 in which M1 is one metal element selected from the group consisting of Fe, Mn and Co, Y is a number satisfying a formula of 0.9 ‰¤ Y ‰¤ 1.2, M2 is at least one metal element selected from the group consisting of Mn, Co, Mg, Ti and Al, and Z is an number satisfying a formula of 0 Z ‰¤0.1, wherein a concentration of the metal element M2 existing on a surface of the particle is higher than the concentration of that existing in core portion of the particle and that the concentration of the metal element M2 is continuously lowered from the surface of particle to a core portion of the particle.
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机译:公开了具有橄榄石结构并且由通式Li Y M1 1-Z M2 Z PO 4表示的多组分体系磷酸锂化合物颗粒,其中M1是选自Fe,Mn和Al的一种金属元素。 Co,Y为满足式0.9≤Y≤1.2的数,M 2为选自由Mn,Co,Mg,Ti和Al组成的组中的至少一种金属元素,并且Z为满足式I的数。 0 <Z≤0.1,其中存在于颗粒表面上的金属元素M2的浓度高于存在于颗粒的核部分中的金属元素的浓度,并且金属元素M2的浓度从金属颗粒M2的浓度连续降低。粒子的表面到粒子的核心部分。
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