With the rising cost and insufficient supply of cobalt, the thrust for cobalt-free cathode materials with the high specific capacity to build Li-ion batteries has increased significantly. Using nickel as the prime electrochemical active species, we have synthesized a new-class of materials with the combination of ordered and disordered phases. To obtain high capacity and electrical charge neutrality, stoichiometry of cations designed in a way that it forms Li/Ni rich Ni-Ti-Mo oxide materials. In addition to conventional capacity from redox activity of transition metals, partially reversible oxygen redox reaction also contributes to electrochemical activity and thus results in unusual high capacity. The resultant cathode materials of LiNi_0.5Ti_0.5O₂-(Li₄MoO₅)_0.8 and LiNiO₂ mixture phases reach the specific capacity of 240 mAh/g. Detailed soft X-ray absorption spectroscopy and electron microscopy are used to reveal the crystal phases in this system and trace changes in the Ni²⁺/Ni⁴⁺ redox couple during charge-discharge processes. Such comprehensive analysis of ordered-disordered oxides suggesting potentiality to develop high-capacity cobalt-free cathodes.

随着成本的增加和钴的供应不足，具有高比容量的无钴正极材料用于制造锂离子电池的推力显着增加。使用镍作为主要的电化学活性物质，我们合成了具有有序相和无序相组合的新型材料。为了获得高容量和电荷中性，阳离子的化学计量设计成形成富Li / Ni的Ni-Ti-Mo氧化物材料。除了由过渡金属的氧化还原活性产生的常规容量外，部分可逆的氧氧化还原反应也有助于电化学活性，因此导致异常的高容量。正极材料LiNi _0.5 Ti _0.5 O _2-（Li₄ MoO ₅）_0.8和LiNiO ₂混合相的比容量达到240 mAh / g。详细的软X射线吸收光谱法和电子显微镜用于揭示该系统中的晶相，并跟踪充放电过程中Ni ²⁺ / Ni ⁴⁺氧化还原对的变化。这种对有序无序氧化物的综合分析表明有潜力开发高容量无钴阴极。