Self-templating synthesis of double-wall shelled vanadium oxide hollow microspheres for high-performance lithium ion batteries
Self-templating synthesis of double-wall shelled vanadium oxide hollow microspheres for high-performance lithium ion batteries
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DOI：
10.1039/c8ta01390j
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发表时间：
2018-04
影响因子：
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通讯作者：
Yaping Wang;Z. Nie;Anqiang Pan;Yifang Zhang;Xiangzhong Kong;Ting Zhu;S. Liang;G. Cao
中科院分区：
文献类型：
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作者：
Yaping Wang;Z. Nie;Anqiang Pan;Yifang Zhang;Xiangzhong Kong;Ting Zhu;S. Liang;G. Cao
以固体氧化钒前驱体为原料，采用抗坏血酸辅助溶剂热法制备了具有多层双壁壳结构的五氧化二钒空心微球。通过调节固体钒氧化物前驱体的燃烧，可以容易地控制钒氧化物微球的内部结构和新型双壁壳的数量。这种独特结构的形成机制是由空气中的扩散控制氧化过程引起的。与单壳V2O5空心微球相比，所获得的具有三重双壁壳的V2O5空心微球作为锂离子电池的电极材料显示出改善的电化学性能。
Hollow structured vanadium pentoxide microspheres with multiple double-walled shells were fabricated from solid vanadium oxide precursors through ascorbic acid-assisted solvothermal growth. The interiors of the vanadium oxide microspheres and number of the novel double-walled shells can be readily controlled by adjusting the combustion of solid vanadium oxide precursors. The formation mechanism of the unique structures is elucidated and attributed to the diffusion controlled oxidation process in air. The obtained V2O5 hollow spheres with triple double-walled shells show improved electrochemical performance compared to single-shelled V2O5 hollow microspheres as electrode materials for lithium-ion batteries.