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Facile Synthesis of Vanadium Metal‐Organic Frameworks for High‐Performance Supercapacitors
Author(s) -
Yan Yan,
Luo Yuqing,
Ma Jingyi,
Li Bing,
Xue Huaiguo,
Pang Huan
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201801815
Subject(s) - supercapacitor , materials science , vanadium , electrochemistry , capacitance , fabrication , power density , electrode , metal organic framework , chemical engineering , current density , metal , aqueous solution , nanotechnology , solid state , transition metal , metallurgy , chemistry , organic chemistry , catalysis , power (physics) , medicine , alternative medicine , physics , pathology , quantum mechanics , adsorption , engineering
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.