| 核壳结构MoOx/C微球的制备及储锂性能 | |
| Preparation and Performance for Lithium Storage of Core-Shell-Structured MoOx/C Microspheres | |
| 摘要: 采用水热法合成了MoO3/酚醛树脂前驱体，然后在空气中进行煅烧处理，成功制备了一种新型核壳MoOx/C微球。对材料的晶体结构、形貌和元素价态进行分析表明，该材料的主要成分是单斜相MoO2、正交晶系MoO3和碳。树脂在空气中的煅烧碳化将MoO3/酚醛树脂前驱体中的六方晶系的MoO3还原为单斜相MoO2。其中少量的MoO2会在空气中重新被氧化成正交晶系的MoO3，形成了MoO2/MoO3异质结构。在这一系列反应的综合作用下，形成这种表面有裂纹的核壳MoOx/C微球复合材料。将该材料用作锂离子电池负极材料，表现出了循环稳定性高、倍率性能好等优异的电化学性能。在100 mA·g-1的电流密度下充放电循环100次之后，可逆容量达640.6 mAh·g-1。 | |
| 关键词: 锂离子电池 二氧化钼 三氧化钼 电化学性能 | |
| 基金项目: 国家自然科学基金（No.21871177，21673140，720102002）资助项目 | |
| Abstract: Core-shell-structured MoOx/C microspheres were prepared through the calcination of a MoO3/resin precursor obtained by a hydrothermal method. Upon calcination, carbonized resin reduced hexagonal MoO3 into monoclinic MoO2. A small amount of monoclinic MoO2 was further oxidized to orthorhombic MoO3, forming core-shell MoOx/C microspheres. The hierarchical MoOx/C microspheres showed excellent electrochemical lithium storage performance when used as an anode material for lithium-ion batteries. High reversible capacities of 640.6 mAh· g-1 was maintained at 100 mA·g-1 after 100 cycles, demonstrating the high reversible capacity and excellent cycle performance of the MoOx/C microspheres for lithium storage. | |
| Keywords: lithium ion battery MoO2 MoO3 electrochemical performance | |
| 投稿时间：2019-07-10 修订日期：2019-09-11 | |
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| 白玉林,王澄,吴越,刘于斯,马超,蔡志鹏,王开学,陈接胜.核壳结构MoOx/C微球的制备及储锂性能[J].无机化学学报,2019,35(11):2045-2050. | |
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