Zhu Xingxing, Huang Xinhua, Anwer Shoaib, Wang Nuoya, Zhang Lidong
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui 232001, P. R. China.
Mechanical Engineering, Khalifa University of Science and Technology, P. O. Box 127788 Abu Dhabi, UAE.
Langmuir. 2020 Aug 11;36(31):9284-9290. doi: 10.1021/acs.langmuir.0c01670. Epub 2020 Aug 2.
We reported a controlled synthesis method to obtained carbon spheres with tunable geometry under low ZnCl aqueous solution conditions using polytriazine as a precursor. The polytriazine precursor was polymerized by mixing/reaction of 2,6-diaminopyridine and formaldehyde in the presence of a diluted ZnCl aqueous system. The obtained nanospheres were then decomposed to adulterate nitrogen porous carbon nanospheres (N-PCNSs) by the decomposition and blistering process at high temperature by degrees. ZnCl worked as a solid-template and played the role of a stabilizing and foaming agent in the reaction. The as-prepared N-PCNSs with controllable spherical geometry, large micro-/mesoporous volume and high nitrogen content (∼8.5 wt %) were employed in electric double-layer capacitors that have a good specific capacitance (636 F/g at 1 A/g) and are long lasting. Besides, the N-PCNS delivered a high energy density of 22.1 Wh/Kg at a power density of 500 W/kg.
我们报道了一种可控合成方法，该方法以聚三嗪为前驱体，在低浓度氯化锌水溶液条件下制备出几何形状可调控的碳球。聚三嗪前驱体通过2,6 - 二氨基吡啶与甲醛在稀释的氯化锌水溶液体系中混合/反应进行聚合。然后，通过逐步高温分解和起泡过程，将所得纳米球分解为掺氮多孔碳纳米球（N - PCNSs）。氯化锌作为固体模板，在反应中起到稳定和发泡剂的作用。所制备的具有可控球形几何形状、大的微孔/介孔体积和高氮含量（约8.5 wt%）的N - PCNSs被应用于双电层电容器中，该电容器具有良好的比电容（1 A/g时为636 F/g）且寿命持久。此外，N - PCNS在功率密度为500 W/kg时提供了22.1 Wh/Kg的高能量密度。
