Zn₃V₃O8的合成、掺杂及电化学性能

Journal of nanoscience and nanotechnology Pub Date : 2021-12-01 DOI:10.1166/jnn.2021.19532

Zheng-Yong Yuan, Yao Xiao, Xiao-Qing Yang, Chuan-Qi Feng

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引用次数: 0

摘要

以Zn(NO₃)₃·6H₂O和NH₄VO₃为原料，采用溶剂热法结合热处理合成了Zn₃V₃O8。将Zn₃V₃O8用Co2+掺杂得到Zn2.88Co0.12V₃O8。采用x射线衍射和扫描电镜技术对样品进行了表征。电化学测试表明，当电流密度为100 mA·g-1时，Zn2.88Co0.12V₃O8的初始放电比容量为640.4 mAh·g-1，高于纯Zn₃V₃O8的563.5 mAh·g-1。经过80次循环后，Zn2.88Co0.12V₃O8的放电比容量保持在652.2 mAh·g-1，高于相同条件下纯Zn₃V₃O8的放电比容量(566.8 mAh·g-1)。Zn2.88Co0.12V₃O8也比纯Zn₃V₃O8具有更好的速率性能。讨论了相关的改性机理。

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Synthesis, Doping and Electrochemical Properties of Zn₃V₃O₈.

The Zn₃V₃O₈ was synthesized by solvothermal method combined with heat treatment using Zn(NO₃)₃ · 6H₂O and NH₄VO₃ as raw materials. The Zn₃V₃O₈ was doped by Co²⁺ to form Zn_2.88Co_0.12V₃O₈. The samples were characterized by X-ray diffraction and scanning electron microscopy techniques. Electrochemical tests showed that the initial discharge specific capacity for Zn_2.88Co_0.12V₃O₈ was 640.4 mAh·g^-1 when the current density was 100 mA·g^-1, which was higher than that of pure Zn₃V₃O₈ (563.5 mAh · g^-1). After 80 cycles, the discharge specific capacity of Zn_2.88Co_0.12V₃O₈ could maintain at 652.2 mAh · g^-1, which was higher than that of pure Zn₃V₃O₈ (566.8 mAh·g^-1) under same condition. The Zn_2.88Co_0.12V₃O₈ owned better rate performances than those of pure Zn₃V₃O₈ also. The related modification mechanisms were discussed in this paper.

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来源期刊

Journal of nanoscience and nanotechnology 工程技术-材料科学：综合

自引率

0.00%

发文量

审稿时长

3.6 months

期刊介绍： JNN is a multidisciplinary peer-reviewed journal covering fundamental and applied research in all disciplines of science, engineering and medicine. JNN publishes all aspects of nanoscale science and technology dealing with materials synthesis, processing, nanofabrication, nanoprobes, spectroscopy, properties, biological systems, nanostructures, theory and computation, nanoelectronics, nano-optics, nano-mechanics, nanodevices, nanobiotechnology, nanomedicine, nanotoxicology.