Evlashin Stanislav A, Maksimov Yurii M, Dyakonov Pavel V, Pilevsky Andrey A, Maslakov Konstantin I, Mankelevich Yuri A, Voronina Ekaterina N, Vavilov Sergei V, Pavlov Alexander A, Zenova Elena V, Akhatov Iskander S, Suetin Nikolay V
Center for Design Manufacturing & Materials, Skolkovo Institute of Science and Technology, 3 Ulitsa Nobelya, Moscow, 121205, Russia.
Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskiye Gory, Moscow, 119991, Russia.
Sci Rep. 2019 Apr 30;9(1):6716. doi: 10.1038/s41598-019-43001-3.
Cycling stability and specific capacitance are the most critical features of energy sources. Nitrogen incorporation in crystalline carbon lattice allows to increase the capacitance without increasing the mass of electrodes. Despite the fact that many studies demonstrate the increase in the capacitance of energy sources after nitrogen incorporation, the mechanism capacitance increase is still unclear. Herein, we demonstrate the simple approach of plasma treatment of carbon structures, which leads to incorporation of 3 at.% nitrogen into Carbon NanoWalls. These structures have huge specific surface area and can be used for supercapacitor fabrication. After plasma treatment, the specific capacitance of Carbon NanoWalls increased and reached 600 F g. Moreover, we made a novel DFT simulation which explains the mechanism of nitrogen incorporation into the carbon lattice. This work paves the way to develop flexible thin film supercapacitors based on carbon nanowalls.
循环稳定性和比电容是能源最关键的特性。在晶体碳晶格中引入氮能够在不增加电极质量的情况下提高电容。尽管许多研究表明引入氮后能源的电容有所增加，但电容增加的机制仍不清楚。在此，我们展示了一种对碳结构进行等离子体处理的简单方法，该方法可使3原子%的氮掺入碳纳米壁中。这些结构具有巨大的比表面积，可用于制造超级电容器。经过等离子体处理后，碳纳米壁的比电容增加并达到600 F g。此外，我们进行了一项新颖的密度泛函理论（DFT）模拟，解释了氮掺入碳晶格的机制。这项工作为开发基于碳纳米壁的柔性薄膜超级电容器铺平了道路。
