| 摘要 |
Mixed oxide which has the composition LixMn0.5−a Ni0.5−b Coa+b O2, where 0.8≦̸x≦̸1.2, 0.05≦̸a≦̸0.3, 0.05≦̸b≦̸0.3, −0.1≦̸a−b≦̸0.02 and a+b<0.5, and has a BET surface area of from 3 to 20 m2/g, a multimodal particle size distribution and a d50 of less than or equal to 5 μm. Mixed oxide which has the composition Lix Mn0.5−a Ni0.5−b Coa+b O2, where 0.8≦̸x≦̸1.2, 0.05≦̸a≦̸0.3, 0.05≦̸b≦̸0.3, −0.1≦̸a−b≦̸0.02 and a+b<0.5, and has a BET surface area of from 0.05 to 1 m2/g, a d50 of less than or equal to 10 μm and a ratio of the intensities of the signals at 2Θ=18.6±1° to 2Θ=44.1±1° in the X-ray diffraction pattern of greater than or equal to 2.4.
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