Lan Mengdi, Liu Bing, Zhao Ruijie, Dong Mengyao, Wang Xixi, Fang Linxia, Wang Lingling
Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, College of Chemistry and Chemical Engineering, Xinyang Normal University, 464000 Xinyang, China.
Henan Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, College of Chemistry and Chemical Engineering, Xinyang Normal University, 464000 Xinyang, China.
J Colloid Interface Sci. 2020 Apr 15;566:79-89. doi: 10.1016/j.jcis.2020.01.077. Epub 2020 Jan 21.
In this paper, CuCoO dandelion arrays grown on nickel foam (CuCoO/NF) was successfully synthesized by a simple hydrothermal route with post-heat-treatment for emolying as a high-performance positive electrode material for hybrid supercapacitors. Due to the unique tree-dimension porous (3D) microstructure and binder-free electrode architecture, the CuCoO/NF electrode deliveries a large specific capacitance of 2656.7 F g at an areal current density of 1 mA cm. Moreover, it has an outstanding rate performance, as well as striking cycling stability. Additionally, a hybrid supercapacitors (HSCs) was fabricated using CuCoO as positive electrode and corals-like N-doping porous carbon (N-CCs) as negative electrode. The device exhibited a broad potential window of 1.55 V and a high specific capacitance of 273.9 F g, which result in a largest energy density of 91.4 Wh kg and a maximum power density of 13.4 kW kg. Finally, the assembled device manifests a preeminent electrochemical stability which maintained a 92.32% capacitance retention after 5000 cycles. The practical application was visually validated by lighting a blue light-emitting diode.
在本文中，通过简单的水热法并结合后续热处理成功合成了生长在泡沫镍上的CuCoO蒲公英阵列（CuCoO/NF），用于作为混合超级电容器的高性能正极材料。由于其独特的三维多孔（3D）微观结构和无粘结剂电极结构，CuCoO/NF电极在面电流密度为1 mA cm时具有2656.7 F g的大比电容。此外，它具有出色的倍率性能以及显著的循环稳定性。此外，使用CuCoO作为正极和珊瑚状氮掺杂多孔碳（N-CCs）作为负极制备了混合超级电容器（HSCs）。该器件表现出1.55 V的宽电位窗口和273.9 F g的高比电容，这导致了91.4 Wh kg的最大能量密度和13.4 kW kg的最大功率密度。最后，组装的器件表现出卓越的电化学稳定性，在5000次循环后电容保持率为92.32%。通过点亮蓝色发光二极管直观地验证了其实际应用。
