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Bitter gourd-shaped Ni3V2O8 anode developed by a one-pot metal-organic framework-combustion technique for advanced Li-ion batteries

机译:苦葫芦状Ni3V2O8阳极由一锅金属有机框架 - 燃烧技术开发,用于高级锂离子电池

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摘要

The present study reports on the one-pot synthesis of Ni3V2O8 (NVO) electrodes by a simple metal organic framework-combustion (MOF-C) technique for anode applications in Li-ion batteries (LIBs). The particle morphology of the prepared NVO is observed to vary as irregular rods, porous bitter gourd and hybrid micro/nano particles depending on the concentration of the framework linker used during synthesis. In specific, the orthorhombic phase and the unique bitter gourd-type secondary structure comprised of agglomerated nanoparticles and porous morphologies is confirmed using powder X-ray diffraction, electron microscopies, X-ray photoelectron spectroscopy and N-2 adsorption desorption measurements. When tested for lithium batteries as anode, the bitter gourd-type NVO electrode shows an initial discharge capacity of 1362 mA h g(-1) and a reversible capacity of 822 mA h g(-1) are sustained at a rate of 200 mA g(-1) after 100 cycles. Moreover, at 2000 mA g(-1), a reversible capacity of 724 mA h g(-1) is retained after 500 cycles. Interestingly, the porous bitter gourd-shaped NVO electrode registered significantly high rate performance and reversible specific capacities of 764, 531 and 313 mA h CI at high rates of 1, 5 and 10 A g(-1), respectively.
机译:本研究报告了通过简单的金属有机框架 - 燃烧(MOF-C)技术在锂离子电池(Libs)中的阳极应用的简单金属有机框架 - 燃烧(MOF-C)技术进行了一锅合成Ni3V2O8(NVO)电极。观察到制备的NVO的颗粒形态以根据合成期间使用的框架连接物的浓度变化为不规则棒,多孔苦葫芦和杂合微/纳米颗粒。在具体的情况下,使用粉末X射线衍射,电子显微镜,X射线光电子能谱和N-2吸附解吸测量来确认由附聚纳米颗粒和多孔形态组成的矫孔相和独特的苦葫芦型二级结构。当为锂电池测试为阳极时,苦葫芦型NVO电极显示初始放电容量为1362 mA Hg(-1),可逆容量为822 mA Hg(-1),以200mA g的速率( -1)100次循环后。此外,在2000 mA g(-1)时,500次循环后,可逆容量为724mA H(-1)。有趣的是,多孔苦葫芦形NVO电极分别以1,5和10Ag(-1)的高速率分别注册了764,531和313mA H CI的显着高速率性能和可逆的特定容量。

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