公开(公告)号：EP2394956A1

公开(公告)日：2011-12-14

申请号：EP09839705.2

申请日：2009-11-20

申请人： National Institute of Advanced Industrial Science and Technology ,  Kabushiki Kaisha Toyota Jidoshokki

发明人： KOJIMA, Toshikatsu ,  SAKAI, Tetsuo ,  MIYUKI, Takuhiro ,  OKUMURA, Yasue ,  KOJIMA, Akira ,  NIWA, Junichi ,  MURASE, Hitotoshi

IPC分类号： C01B33/32 ,  C01B33/12 ,  H01M4/58

CPC分类号： H01M4/5825 ,  C01B33/32 ,  H01M10/052 ,  Y02E60/122 ,  Y02P70/54

摘要： The present invention is one which provides a production process for lithium-silicate-system compound, the production process being characterized in that : a lithium-silicate compound being expressed by Li 2 SiO 3 is reacted with a substance including at least one member of transition-metal elements that is selected from the group consisting of iron and manganese at 400-650 °C in a molten salt of a carbonate mixture comprising lithium carbonate and at least one member of alkali-metal carbonates that is selected from the group consisting of potassium carbonate, sodium carbonate, rubidium carbonate and cesium carbonate in a mixed-gas atmosphere including carbon dioxide and a reducing gas; and a positive-electrode active material for lithium-ion secondary battery that comprises a lithium-silicate-system compound being obtained by the aforesaid process.
In accordance with the present invention, it becomes feasible to produce lithium-silicate-system materials, which are useful as positive-electrode active materials for lithium-ion secondary battery, and the like, by means of relatively simple and easy means.

摘要翻译： 本发明是提供硅酸锂系化合物的制造方法的制造方法，其特征在于：将由Li 2 SiO 3表示的硅酸锂化合物与包含至少一种过渡成员的物质反应 在包含碳酸锂的碳酸盐混合物和至少一种碱金属碳酸盐成员的熔融盐中，在400-650℃下选自铁和锰的金属元素，所述碱金属碳酸盐选自钾 碳酸盐，碳酸钠，碳酸铷和碳酸铯在包括二氧化碳和还原气体的混合气体气氛中; 以及包含通过上述方法获得的硅酸锂系化合物的锂离子二次电池用正极活性物质。 根据本发明，通过相对简单和容易的手段，可以生产用作锂离子二次电池的正极活性物质等的硅酸锂系材料。