Ye Beirong, Zhou Jinglin, Cao Xianjun, Zhao Qiang, Zhang Yongqi, Wang Jinshu
School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 610054, People's Republic of China.
Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, People's Republic of China.
ACS Appl Mater Interfaces. 2021 Nov 17;13(45):53868-53876. doi: 10.1021/acsami.1c15392. Epub 2021 Nov 2.
The rapidly developing wearable flexible electronics makes the development of high-performance flexible energy storage devices, such as all-solid-state supercapacitors (SCs), particularly important. Herein, we report the fabrication of CNTs/NiCoSe hybrid films on carbon cloth (CC) through a facile co-electrodeposition method based on flexible electrodes for all-solid-state SCs. The NiCoSe sheets grown on CNTs uniformly with a diameter of 50-100 nm act as the active materials. The CNTs in the hybrid films act as the scaffold to offer more deposition sites for NiCoSe and provide a conductive network to facilitate the transfer of electrons. Moreover, the one-step electrodeposition process avoids the usage of any organic binders. Benefiting from the high intrinsic reactivity and unique 3D architecture, the obtained CNTs/NiCoSe electrode delivers high specific capacity (218.1 mA h g) and satisfactory durability (over 5000 cycles). Remarkably, the CNTs/NiCoSe//AC flexible all-solid-state (FASS) ASC provides remarkable energy density (112.2 W h kg) within 0-1.7 V and maintains 98.1% of its initial capacity after 10,000 cycles. In addition, this flexible ASC device could be fabricated at a large scale (5 × 6 cm), and the LED arrays (>3.7 V) can be easily lighted up by three ASCs in series, showing its potential practical application.
快速发展的可穿戴柔性电子器件使得高性能柔性储能器件的开发，如全固态超级电容器（SCs），变得尤为重要。在此，我们报道了通过一种基于全固态SCs柔性电极的简便共电沉积方法，在碳布（CC）上制备碳纳米管/硒化镍钴（CNTs/NiCoSe）混合薄膜。生长在碳纳米管上的直径为50 - 100 nm的硒化镍钴片作为活性材料。混合薄膜中的碳纳米管作为支架，为硒化镍钴提供更多的沉积位点，并提供导电网络以促进电子转移。此外，一步电沉积过程避免了使用任何有机粘合剂。得益于高本征反应活性和独特的三维结构，所制备的碳纳米管/硒化镍钴电极具有高比容量（218.1 mA h g）和令人满意的耐久性（超过5000次循环）。值得注意的是，碳纳米管/硒化镍钴//活性炭（AC）柔性全固态（FASS）不对称超级电容器（ASC）在0 - 1.7 V范围内提供了显著的能量密度（112.2 W h kg），并且在10000次循环后保持其初始容量的98.1%。此外，这种柔性ASC器件可以大规模制备（5×6 cm），并且三个串联的ASC可以轻松点亮发光二极管阵列（>3.7 V），显示出其潜在的实际应用价值。
