Zieba Wojciech, Olejnik Piotr, Koter Stanislaw, Kowalczyk Piotr, Plonska-Brzezinska Marta E, Terzyk Artur P
Faculty of Chemistry, Physicochemistry of Carbon Materials Research Group, Nicolaus Copernicus University in Toruń Gagarin Street 7 87-100 Toruń Poland
Department of Organic Chemistry, Faculty of Pharmacy with the Division of Laboratory Medicine, Medical University of Bialystok Mickiewicza 2A 15-222 Bialystok Poland
RSC Adv. 2020 Oct 19;10(63):38357-38368. doi: 10.1039/d0ra07748h. eCollection 2020 Oct 15.
We investigated the electrochemical performance of single-walled carbon nanohorns (SWCNHs) for use as supercapacitor electrodes. For the first time, we used acid-treatment for oxidation of SWCNHs and hole creation in their structure. A detailed study was performed on the correlation between the oxidation of SWCNHs acid treatment and variable acid treatment times, the structural properties of the oxidized carbon nanostructures, and the specific capacitance of the SWCNH electrodes. We showed that simple functionalization of carbon nanostructures under controlled conditions leads to an almost 3-fold increase in their specific capacitance (from 65 to 180 F g in 0.1 M HSO). This phenomenon indicates higher accessibility of the surface area of the electrodes by electrolyte ions as a result of gradual opening of the SWCNH internal channels.
我们研究了用作超级电容器电极的单壁碳纳米角（SWCNHs）的电化学性能。我们首次使用酸处理来氧化SWCNHs并在其结构中制造孔洞。针对SWCNHs的氧化（酸处理）与可变酸处理时间之间的相关性、氧化后的碳纳米结构的结构特性以及SWCNH电极的比电容进行了详细研究。我们表明，在受控条件下对碳纳米结构进行简单功能化会使其比电容几乎增加3倍（在0.1 M H₂SO₄中从65 F/g增加到180 F/g）。这一现象表明，由于SWCNH内部通道逐渐打开，电解质离子对电极表面积的可及性更高。
