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首页> 外文期刊>Royal Society Open Science >Eco-friendly synthesis of VO2 with stripped pentavalent vanadium solution extracted from vanadium-bearing shale by hydrothermal process in high conversion rate
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Eco-friendly synthesis of VO2 with stripped pentavalent vanadium solution extracted from vanadium-bearing shale by hydrothermal process in high conversion rate

机译：水热法从含钒页岩中提取的五价汽提钒溶液生态合成高VO2

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摘要

VO 2 (B) has shown excellent cathode performance in lithium batteries and become a hot research topic in recent years. A stripped vanadium solution extracted from vanadium-bearing shale containing a high concentration of vanadium and certain amounts of impurities was used as a vanadium source to synthesize VO 2 (B) by hydrothermal process. The VO 2 conversion rate can reach as high as 99.47% in a reaction time of 8 h, and this is the highest result reported. The crystalline structure and morphology of the synthesized products were characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM). Furthermore, the electrochemical properties of VO 2 (B) in lithium-ion batteries were investigated. The results indicated that the VO 2 (B) has the initial specific discharge capacity of 192.0 mAh g ?1 . Stripped vanadium solution is a raw material for producing V 2 O 5 and NH 4 VO 3 , which are indispensable vanadium sources in VO 2 synthesis. Therefore, synthesis of VO 2 via hydrothermal reduction by oxalic acid using stripped vanadium solution extracted from vanadium-bearing shale as a direct vanadium source is an eco-friendly, innovative and efficient method, and will have a great impact on VO 2 synthesis.
机译：VO 2（B）在锂电池中显示出优异的正极性能，并成为近年来的热门研究课题。从含有高浓度钒和一定量杂质的含钒页岩中提取的汽提钒溶液用作钒源，通过水热法合成VO 2（B）。在8小时的反应时间内，VO 2的转化率可高达99.47％，这是报道的最高结果。通过X射线衍射（XRD），拉曼光谱，X射线光电子能谱（XPS），扫描电子显微镜（SEM）和透射电子显微镜（TEM）来表征合成产物的晶体结构和形态。此外，研究了锂离子电池中VO 2（B）的电化学性能。结果表明，VO 2（B）的初始比放电容量为192.0mAh g-1。汽提钒溶液是生产V 2 O 5和NH 4 VO 3的原料，它们是VO 2合成中不可缺少的钒源。因此，以含钒页岩提取的钒溶液为直接钒源，通过草酸水热还原合成VO 2是一种环保，创新，高效的方法，将对VO 2的合成产生重大影响。

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