Roche Sandra, Yacou Christelle, Jean Marius Corine, Ranguin Ronald, Francoeur Marckens, Taberna Pierre-Louis, Passe-Coutrin Nady, Gaspard Sarra
Laboratory «Connaissance et Valorisation: Chimie des Matériaux, Environnement, Énergie» (COVACHIM-M2E-EA 3592), Faculté des Sciences Exactes et Naturelles, Université des Antilles, B.P. 250, CEDEX, 97157 Pointe-à-Pitre, France.
CIRIMAT, UMR CNRS 5085, Université Paul Sabatier Toulouse III, 118 Route de Narbonne, 31062 Toulouse, France.
Molecules. 2023 Aug 4;28(15):5882. doi: 10.3390/molecules28155882.
Since 2011, substantial amounts of pelagic Sargassum algae have washed up along the Caribbean beaches and the Gulf of Mexico, leading to negative impacts on the economy and the environment of those areas. Hence, it is now crucial to develop strategies to mitigate this problem while valorizing such invasive biomass. This work deals with the successful exploitation of this pelagic Sargassum seaweed for the fabrication of carbon materials that can be used as electrodes for supercapacitors. Pelagic Sargassum precursors were simply pyrolyzed at temperatures varying from 600 to 900 °C. The resultant carbonaceous materials were then extensively characterized using different techniques, such as nitrogen adsorption for textural characterization, as well as X-ray photoelectron (XPS), Fourier transform infrared spectroscopies (FT-IR) and scanning electron microscopy (SEM), to understand their structures and functionalities. The electrochemical properties of the carbon materials were also tested for their performance as supercapacitors using cyclic voltammetry (CV), the galvanostatic method and electrochemical impedance spectroscopy analyses (EIS). We managed to have a large specific surface, i.e., 1664 m g for biochar prepared at 800 °C (CS800). Eventually, CS800 turned out to exhibit the highest capacitance (96 F g) over the four samples, along with the highest specific surface (1664 m g), with specific resistance of about 0.07 Ω g .
自2011年以来，大量浮游马尾藻被冲刷到加勒比海滩和墨西哥湾沿岸，对这些地区的经济和环境造成了负面影响。因此，制定策略来缓解这一问题并同时利用这种入侵性生物质的价值，现在至关重要。这项工作涉及成功利用这种浮游马尾藻制造可作为超级电容器电极的碳材料。将浮游马尾藻前驱体在600至900°C的温度下进行简单热解。然后使用不同技术对所得碳质材料进行广泛表征，如用于结构表征的氮气吸附，以及X射线光电子能谱（XPS）、傅里叶变换红外光谱（FT-IR）和扫描电子显微镜（SEM），以了解其结构和功能。还使用循环伏安法（CV）、恒电流法和电化学阻抗谱分析（EIS）测试了碳材料作为超级电容器的电化学性能。我们成功获得了较大的比表面积，即800°C制备的生物炭（CS800）的比表面积为1664 m²/g。最终，CS800在四个样品中表现出最高的电容（96 F/g），以及最高的比表面积（1664 m²/g），电阻率约为0.07 Ω/g。
