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Controlled synthesis of rod-like LiVMoO6 nanocrystals for application in lithium-ion batteries

机译：棒状LiVMoO6纳米晶的可控合成用于锂离子电池

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摘要

This paper reports a newly developed method for the shape and size control of transition metal composite oxides, such as LiVMoO6, to obtain significantly enhanced electrode properties for lithium-ion batteries. Rod-like LiVMoO6 nanocrystals were synthesized through a designed route of partial reduction, self-assembly and re-oxidation. V5+ and Mo6+ ions were used with low-grade starting materials to get a mixed valence of V and Mo. It is believed that ion pairs of V5+/V4+ or Mo6+/Mo5+ in the resultant mixture play an important role in the formation of a template precursor by self-assembly during a rheological phase reaction, although further explanation is required. The electrochemical performance of the LiVMoO6 obtained has been much improved due to the increased crystallinity and reduced particle size of this material. 176 mA h g(-1) and 166 mA h g(-1) capacity was delivered in the initial discharge with a reversible capacity retention of 94.8% and 95.3% after 100 cycles in the range of 3.6-1.80 V versus metallic Li at 1 and 3 C current rate, respectively.
机译：本文报道了一种新开发的方法，用于控制过渡金属复合氧化物（例如LiVMoO6）的形状和尺寸，以显着提高锂离子电池的电极性能。通过部分还原，自组装和再氧化的设计路线合成了棒状LiVMoO6纳米晶体。 V5 +和Mo6 +离子与低级原料一起使用可得到V和Mo的混合价。据信，所得混合物中的V5 + / V4 +或Mo6 + / Mo5 +离子对在模板形成中起重要作用在流变相反应过程中通过自组装形成前驱体，尽管需要进一步解释。所获得的LiVMoO6的电化学性能由于该材料的增加的结晶度和减小的粒度而得到了大大改善。初始放电中提供了176 mA hg（-1）和166 mA hg（-1）的容量，在3.6-1.80 V的电压范围内，经过100次循环后，可逆容量保持率分别为94.8％和95.3％，而金属Li在1和2V下。电流速率分别为3C。

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