公开(公告)号：US20070042273A1

公开(公告)日：2007-02-22

申请号：US10555882

申请日：2004-04-26

申请人： Jean-Claude Jumas ,  Josette Olivier-Fourcade ,  Pierre-Emmanuel Lippens ,  Laurent Aldon ,  Aurelie Picard ,  Pierre Kubiak

发明人： Jean-Claude Jumas ,  Josette Olivier-Fourcade ,  Pierre-Emmanuel Lippens ,  Laurent Aldon ,  Aurelie Picard ,  Pierre Kubiak

IPC分类号： H01M6/18

CPC分类号： H01M10/052 ,  C01G23/003 ,  C01G23/005 ,  C01G53/006 ,  C01P2002/52 ,  C01P2002/54 ,  C01P2002/72 ,  C01P2002/77 ,  C01P2002/80 ,  C01P2006/40 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/0525 ,  H01M2004/027 ,  Y10T29/49108

摘要： An active material for high-voltage negative electrodes (>1 V vs. Li) of secondary rechargeable lithium batteries is disclosed. Chemical composition is represented by the general formula Li2+vTi3−WFeXMyM′ZO7−α, where M and M′ are metal ions having an ionic radius between 0.5 and 0.8 A and forming an octahedral structure with oxygen, like Ti3+, Co2+, Co3+, Ni2+, Ni3+, Cu2+, Mg2+, Al3+, In3+, Sn4+, Sb3+, Sb5+, α is related to the formal oxidation numbers n and n′ of M and M′ by the relation 2α=v+4w −3x−ny−n′z and the ranges of values are −0.5≦V≦0.5, 0≦w≦0.2, x>0, y+z>0 and x+y+z≦0.7. The structure is related to that of ramsdellite for all the compositions. The negative active material is prepared by ceramics process wherein lithium oxide, titanium oxide, iron oxide, M and/or M′ oxide are used as starting material for synthesis. Inorganic or organic solid precursors of the oxides can also be used instead. After reactant dispersion the mixture is fired. The resulting electrochemically active material provides low working voltage and capacity with excellent cycling capabilities at both low and high current densities.

摘要翻译： 公开了二次可再充电锂电池的高电压负极（> 1V对Li）的活性材料。 化学成分由通式Li 2 + v 3 Ti 3 -W 3 Fe x M M'表示， 其中M和M'是离子半径在0.5和0.8A之间的金属离子，并且与氧形成八面体结构，如Ti 3+，3+，3+，3+，3+，3+，3+，3+，3+，3++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ，Cu 2+，Mg 2+，N 3+，3+，Sn 4+， Sb 3+，Sb 5+，α与M和M'的形式氧化数n和n'有关，其关系为2alpha = v + 4w -3x-ny-n'z，值的范围为-0.5 <= V <= 0.5,0 <= w <= 0.2，x> 0，y + z> 0，x + y + z < 0.7。 该结构与所有组合物的ramsdellite相关。 负极活性物质通过陶瓷工艺制备，其中使用氧化锂，氧化钛，氧化铁，M和/或M'氧化物作为合成起始材料。 也可以使用氧化物的无机或有机固体前体。 反应物分散后，将混合物烧制。 所得到的电化学活性材料在低电流密度和高电流密度下提供低工作电压和容量以及优异的循环能力。