PROCEDE DE SYNTHESE DE MATERIAU A BASE DE LIXM1-YM'Y(XO4)N
    3.
    发明公开
    PROCEDE DE SYNTHESE DE MATERIAU A BASE DE LIXM1-YM'Y(XO4)N 有权
    合成材料AUF基础VON LIXM1-YM'Y(XO4)N

    公开(公告)号:EP1325526A1

    公开(公告)日:2003-07-09

    申请号:EP01973907.7

    申请日:2001-09-21

    摘要: The invention concerns a synthesis method for a material consisting of particles comprising a core and a coating and/or being interconnected by a carbon cross-linkage, the core of said particles including at least a compound of formula LixM1-yM'y(XO4)n wherein: x, y and n are numbers such that 0≤ x ≤2, 0 ≤ y ≤0.6 and 1 ≤ n ≤1.5; M is a transition metal; M' is a element of fixed valency, and the synthesis being performed by reacting and balancing the mixture of precursors, with a reducing gas atmosphere, so as to bring the transition metal(s) to the desired degree of valency, the synthesis being carried out in the presence of a carbon source called conductive carbon which is pyrolyzed. The resulting materials exhibit excellent electrical conductivity and a highly enhanced chemical activity. M' can be selected among Mg?2+, Ca2+ Al3+, Zn2+¿ or a combination of those elements, X is selected among S, P, and Si. Said material can be used as active electrode material in batteries.

    摘要翻译: 制备含有过渡金属,固定的价态金属和磷酸盐,硫酸盐或硅酸盐形式的锂的碳桥化合物。 式CLi xM 1-yM 1> y(XO 4)n(A)的化合物的合成包括以所需比例平衡和/或均匀的均匀混合物,其包含:(a)氧化态的M源或多或少 最终化合物中的金属比; (b)元素M 1>的源; (c)锂源; (d)任选的X的源化合物; 和(e)导电碳源。 C:桥连碳与化合物CLi xM 1-yM 1> y(XO 4)n; x:0-2; y:0-0.6; n:1-1.5; M:过渡金属或周期表第一系列的混合物; M 1> Mg 2+>,Ca 2+>,Al 3+>或Zn 2+>或它们的组合; X,S,P或Si源M,M 1>,Li和X可以在至少一个阶段中引入,并且合成以气态气氛中所需比例的热力学或动力学平衡进行,以便施加氧化 过渡金属的状态达到所需的化合价; 对于Fe,Mn,Co,Ni,该化合价优选为2,对于Ti和V,该价数为3或4。这由气态气氛的组成,反应温度和源(c)化合物相对于(a ),(b)和(d)。 该方法包括化合物(e)的热解阶段,以获得化合物,其中在压力大于或等于3000,优选3750Kg·cm -2>的压实粉末上测量的电子传导性大于10- 8> S.cm -1>。 对于所获得的化合物(A)和含有这些材料的电化学电池,还包括独立权利要求。