Wang Guangning, Chen Tingting, Gómez-García Carlos J, Zhang Feng, Zhang Mingyi, Ma Huiyuan, Pang Haijun, Wang Xinming, Tan Lichao
Key Laboratory of Green Chemical Engineering and Technology, School of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin, 150040, P. R. China.
Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin, 150025, P. R. China.
Small. 2020 Jul;16(29):e2001626. doi: 10.1002/smll.202001626. Epub 2020 Jun 16.
The development of a negative electrode for supercapacitors is a critical challenge for the next-generation of energy-storage devices. Herein, two new electrodes formed by the coordination polymers [Ni(itmb) (HPMo O )]·2H O (1) and [Zn(itmb) (H O)(HPMo O )]·4H O (2) (itmb = 1-(imidazo-1-ly)-4-(1,2,4-triazol-1-ylmethyl)benzene), synthesized by a simple hydrothermal method, are described. Compounds 1 and 2 show high capacitances of 477.9 and 890.2 F g , respectively. An asymmetric supercapacitor device assembled using 2 which has novel water-assisted proton channels as negative electrode and active carbon as positive electrode shows ultrahigh energy density and power density of 23.4 W h kg and 3864.4 W kg , respectively. Moreover, the ability to feed a red light emitting diode (LED) also demonstrates the feasibility for practical use. The results allow a better elucidation of the storage mechanism in polyoxometalate-based coordination polymers and provide a promising direction for exploring novel negative materials for new-generation high-performance supercapacitors.
开发用于超级电容器的负极是下一代储能设备面临的一项关键挑战。在此，描述了通过简单水热法合成的由配位聚合物[Ni(itmb)(HPMoO)]·2H₂O(1)和[Zn(itmb)(H₂O)(HPMoO)]·4H₂O(2)(itmb = 1-(咪唑-1-基)-4-(1,2,4-三唑-1-基甲基)苯)形成的两种新型电极。化合物1和2分别显示出477.9和890.2 F g的高电容。使用具有新型水辅助质子通道的2作为负极和活性炭作为正极组装的不对称超级电容器装置分别显示出23.4 W h kg和3864.4 W kg的超高能量密度和功率密度。此外，为红色发光二极管(LED)供电的能力也证明了其实际应用的可行性。这些结果有助于更好地阐明基于多金属氧酸盐的配位聚合物中的存储机制，并为探索用于新一代高性能超级电容器的新型负极材料提供了一个有前景的方向。
