Process for the preparation of LiFePO4-carbon composites
    10.
    发明授权
    Process for the preparation of LiFePO4-carbon composites 有权
    制备LiFePO4-碳复合材料的方法

    公开(公告)号:US09209461B2

    公开(公告)日:2015-12-08

    申请号:US13379048

    申请日:2010-06-23

    摘要: The present invention relates to a process for the preparation of particles comprising at least one compound according to general formula (I) M1aM2bM3cOoNnFf (I) wherein M1, M2, M3 O, N, F, a, b, c, o, n and f have the following meanings: M1 at least one alkaline metal, M2 at least one transition metal in oxidation state +2, M3 at least one non-metal chosen form S, Se, P, As, Si, Ge and/or B, O oxygen, N nitrogen, F fluorine, a 0.8-4.2, b 0.8-1.9, c 0.8-2.2, o 1.0-8.4, n 0-2.0 and f 0-2.0, wherein a, b, c, o, n and f are chosen to ensure electroneutrality of the compound according to general formula (I), and carbon, comprising at least the following steps: (A) providing an essentially aqueous mixture comprising at least one compound comprising M1, at least one compound comprising M2 having at least partially an oxidation state higher than +2, optionally at least one compound comprising M3, at least one compound comprising N, if present, and/or at least one compound comprising F, if present, at least one polysaccharide comprising glucose having a molecular weight M of at least 50000 g/mol as carbon precursor and at least one reducing agent, (B) drying the mixture provided in step (A), in order to obtain a solid particle and (C) calcining the solid particle obtained from step (B) at a temperature of 300 to 950° C.

    摘要翻译: 本发明涉及一种制备颗粒的方法,所述颗粒包含至少一种根据通式(I)的M1aM2bM3cOoNnFf(I)的化合物,其中M1,M2,M3O,N,F,a,b,c,o,n和 f具有以下含义:M1至少一种碱金属,M2至少一种氧化态过渡金属+2,M3至少一种非金属选择形式S,Se,P,As,Si,Ge和/或B, O氧,N氮,F氟,0.8-4.2,b 0.8-1.9,c 0.8-2.2,o 1.0-8.4,n 0-2.0和f 0-2.0,其中a,b,c,o,n和 选择f以确保根据通式(I)的化合物和包含至少以下步骤的碳的电中性:(A)提供基本上含水的混合物,其包含至少一种包含M1,至少一种包含M2的化合物,其包含具有 至少部分地高于+2的氧化态,任选地至少一种包含M3的化合物,至少一种包含N的化合物(如果存在)和/或至少一种包含F的化合物 送出至少一种包含分子量M至少为50000g / mol的葡萄糖作为碳前体和至少一种还原剂的至少一种多糖,(B)干燥步骤(A)中提供的混合物,以获得固体颗粒 和(C)在300-950℃的温度下煅烧由步骤(B)得到的固体颗粒。