Facile Synthesis of Vanadium Metal‐Organic Frameworks for High‐Performance Supercapacitors,Small

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Facile Synthesis of Vanadium Metal‐Organic Frameworks for High‐Performance Supercapacitors
Small ( IF 13.0 ) Pub Date : 2018-07-20 , DOI: 10.1002/smll.201801815
Yan Yan ₁ , Yuqing Luo ₁ , Jingyi Ma ₁ , Bing Li ₁ , Huaiguo Xue ₁ , Huan Pang ₁

Affiliation

Compared to traditional metal oxides, metal‐organic frameworks exhibit excellent properties, such as a high surface area, significant thermal stability, low density, and excellent electrochemical performance. Here, a simple process is proposed for the fabrication of rod‐like vanadium metal‐organic frameworks (V^IV(O)(bdc), bdc = 1,4‐benzenedicarboxylate, or MIL‐47), and the effect of the structure on the electrochemical performance is investigated via a series of electrochemical measurements. The V^IV(O)(bdc) electrode exhibits a maximum specific capacitance of 572.1 F g⁻¹ at current densities of 0.5 A g⁻¹. More significantly, aqueous and solid‐state asymmetric supercapacitors are successfully assembled. The solid‐state device shows an excellent energy density of 6.72 mWh cm⁻³ at a power density of 70.35 mW cm⁻³. This superior performance confirms that V^IV(O)(bdc) electrodes are promising materials for applications in supercapacitors.

中文翻译：

用于高性能超级电容器的钒金属有机框架的简便合成

与传统的金属氧化物相比，金属有机框架表现出优异的性能，例如高表面积、显着的热稳定性、低密度和优异的电化学性能。在这里，提出了一种简单的方法来制造棒状钒金属有机骨架（V ^IV (O)(bdc)，bdc = 1,4-苯二甲酸，或MIL-47），以及该结构对通过一系列电化学测量来研究电化学性能。 V ^IV (O)(bdc) 电极在0.5 A g ^-1的电流密度下表现出572.1 F g ^-1的最大比电容。更重要的是，成功组装了水性和固态不对称超级电容器。该固态器件在70.35 mW cm ^-3的功率密度下表现出6.72 mWh cm ^-3的优异能量密度。这种优异的性能证实了 V ^IV (O)(bdc) 电极是超级电容器应用的有前途的材料。

更新日期：2018-07-20

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