Mykhailiv Olena, Imierska Monika, Petelczyc Martyna, Echegoyen Luis, Plonska-Brzezinska Marta E
Institute of Chemistry, University of Bialystok, Hurtowa 1, 15-399 Bialystok (Poland), Fax: (+48-85) 747-0113.
Chemistry. 2015 Apr 7;21(15):5783-93. doi: 10.1002/chem.201406126. Epub 2015 Mar 3.
The development of high-surface-area carbon electrodes with a defined pore size distribution and the incorporation of pseudo-active materials to optimize the overall capacitance and conductivity without destroying the stability are at present important research areas. Composite electrodes of carbon nano-onions (CNOs) and polypyrrole (Ppy) were fabricated to improve the specific capacitance of a supercapacitor. The carbon nanostructures were uniformly coated with Ppy by chemical polymerization or by electrochemical potentiostatic deposition to form homogenous composites or bilayers. The materials were characterized by transmission- and scanning electron microscopy, differential thermogravimetric analyses, FTIR spectroscopy, piezoelectric microgravimetry, and cyclic voltammetry. The composites show higher mechanical and electrochemical stabilities, with high specific capacitances of up to about 800 F g(-1) for the CNOs/SDS/Ppy composites (chemical synthesis) and about 1300 F g(-1) for the CNOs/Ppy bilayer (electrochemical deposition).
目前，开发具有特定孔径分布的高比表面积碳电极以及加入准活性材料以优化整体电容和电导率而不破坏稳定性是重要的研究领域。制备了碳纳米洋葱（CNO）和聚吡咯（Ppy）的复合电极以提高超级电容器的比电容。通过化学聚合或电化学恒电位沉积将碳纳米结构均匀地包覆Ppy，以形成均匀的复合材料或双层结构。通过透射电子显微镜、扫描电子显微镜、差示热重分析、傅里叶变换红外光谱、压电微重力分析和循环伏安法对材料进行了表征。复合材料表现出更高的机械和电化学稳定性，CNOs/SDS/Ppy复合材料（化学合成）的比电容高达约800 F g⁻¹，CNOs/Ppy双层结构（电化学沉积）的比电容高达约1300 F g⁻¹。
