NaVPO4F prepared under air as a cathode material for sodium-ion batteries
NaVPO4F prepared under air as a cathode material for sodium-ion batteries
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DOI：
10.1016/j.matlet.2017.07.073
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发表时间：
2017-12-15
影响因子：
3
通讯作者：
Feng, Jijun
中科院分区：
文献类型：
--
作者：
Chang, Caiyun;Li, Ye;Feng, Jijun
通过控制水热反应后的升温/降温速率和保温温度，在空气中成功合成了含三价钒的NaVPO 4F。NaVPO 4F中的钒（III）即使在空气中也可以容易地和成功地保持。所制备的NaVPO_4F具有与氩气保护下制备的NaVPO_4F相似的结构和循环性能。当作为钠离子电池的阴极材料在高倍率电流下操作时，表现出甚至更优异的性能。通过循环性能、倍率性能和电化学阻抗谱研究了热处理气氛对合金电化学性能的影响。空气下加热的NaVPO 4F由于其易于合成和低成本，可以为钠离子电池提供更广泛的应用。(C)2017爱思唯尔B. V.保留所有权利。
NaVPO4F with trivalent vanadium was successfully synthesized under air through controlling the appropriate heating/cooling rate and holding temperature after a hydrothermal process. The vanadium (III) in NaVPO4F can be facilely and successfully maintained even under air. As produced NaVPO4F has similar structure and cycle performance as the one prepared under argon protection. Even more excellent capability was exhibited when operating at high rate currents as cathode material for sodium-ion batteries. The effects of heat treatment atmosphere on electrochemical performances were evaluated by cycle performance, rate capability, and electrochemical impedance spectroscopy. NaVPO4F heated under air could offer a wider range of applications for sodium-ion batteries due to its facile synthesis and low cost. (C) 2017 Elsevier B.V. All rights reserved.