Synthesis and Characterization of Mn_(1-x)Mo_(2x)V_(2(1-x))O_6(0≤x ≤0.5) and Their Application as the Anode for Li Secondary Battery

机译：Mn_（1-x）Mo_（2x）V_（2（1-x））O_6（0≤x≤0.5）的合成，表征及其在锂二次电池中的应用

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Mn_(1-x)Mo_(2x)V_(2(1-x))06 (0≤x≤0.5) were proposed as new anode candidate materials for Li secondary battery. The starting materials used were Mn_2O_3, V_2O_5, and MoO_3. The mixtures of starting materials were heated in a furnace under air atmosphere. From XRD analysis, all the prepared samples except for Mn_(1-x) Mo_(2x)V_(2(1-x))O_6 (x = 0.5) have brannerite-type structure. For x = 0.5 compound, a trace of MoO_3 was observed. The valences of Mn, V and Mo in Mn_(1-x)Mo_(2x)V_(2(1-x)) O_6 (x = 0.3) measured by XANES were 2+, 5+ and 6+, respectively. Electrochemical properties revealed that all the samples had a capacity higher than 1000 Ah/kg, and their cycleability was improved as the value of x increased. Ex-situ XRD measurements indicated that Mn_(1-x)Mo_(2x)V_(2(1-x))O_6 (x = 0.5) transformed to an amorphous phase via a kind of NaCl rock-salt structure upon the insertion of lithium ion during the first discharge.

机译：提出了Mn_（1-x）Mo_（2x）V_（2（1-x））06（0≤x≤0.5）作为锂二次电池的新型负极材料。所用的起始原料是Mn_2O_3，V_2O_5和MoO_3。将起始原料的混合物在空气气氛下的炉中加热。通过X射线衍射分析，除Mn_（1-x）Mo_（2x）V_（2（1-x））O_6（x = 0.5）外，所有制备的样品均具有褐铁矿型结构。对于x = 0.5的化合物，观察到痕量的MoO_3。 XANES测得的Mn_（1-x）Mo_（2x）V_（2（1-x））O_6（x = 0.3）中的Mn，V和Mo的化合价分别为2 +，5 +和6+。电化学性质表明，所有样品的容量均高于1000 Ah / kg，并且随着x值的增加，其循环能力得到改善。异位X射线衍射测量表明，Mn_（1-x）Mo_（2x）V_（2（1-x））O_6（x = 0.5）插入后通过一种NaCl岩盐结构转变为非晶相。第一次放电期间的锂离子。

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《Fourth International Symposium on Ionic and Mixed Conducting Ceramics, null》||p.193-199|共7页
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Daishu Hara; Hiromasa Ikuta; Yoshiharu Uchimoto; Masataka Wakihara;
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Department of Applied Chemistry, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8552, Japan;

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Synthesis and Characterization of Mn_(1-x)Mo_(2x)V_(2(1-x))O_6(0≤x ≤0.5) and Their Application as the Anode for Li Secondary Battery

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