Institute of Nano-Science and Nano-Technology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, PR China; Physics Department, Faculty of Education, University of Zalingei, Zalingei (+249)183488945, Sudan.
Institute of Nano-Science and Nano-Technology, College of Physical Science and Technology, Central China Normal University, Wuhan 430079, PR China.
J Colloid Interface Sci. 2019 Mar 7;538:308-319. doi: 10.1016/j.jcis.2018.11.103. Epub 2018 Nov 28.
Due to an effective synthesis strategy, two kinds of hierarchical porous activated carbons were derived via KOH and HPO activation and carbonization processes from baobab fruit shells (BFSs) used as a green and low-cost biomass precursor. The physicochemical properties and the morphological structure of the baobab fruit shell derived carbons (BFSCs) were systematically studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectra, nitrogen adsorption/desorption isotherms and X-ray photoelectron spectroscopy (XPS) techniques. The biomass-derived activated carbons, BFSC1 (using KOH activation), and BFSC2 (using HPO activation), obtained exhibit high specific capacitances of 233.48 F g and 355.8 F g at a current density of 1 A g, respectively, due to their different surface structures and high specific surface areas. Furthermore, the as-assembled, flexible all-solid-state supercapacitor devices based on the BFSC electrodes exhibit a high specific capacitance of 58.67 F g at 1 A g and a high energy density of 20.86 Wh kg at a power density of 400 W kg. This facile route highlights the exciting possibility of utilizing waste baobab fruit shells to produce low-cost, green and high-performance carbon-based electrode materials for sustainable electrochemical energy storage systems.
由于采用了有效的合成策略，通过 KOH 和 HPO 活化碳化过程，从用作绿色和低成本生物质前体的猴面包果壳（BFS）中得到了两种分级多孔活性炭。通过扫描电子显微镜（SEM）、X 射线衍射（XRD）、拉曼光谱、氮气吸附/脱附等温线和 X 射线光电子能谱（XPS）技术系统研究了猴面包果壳衍生碳（BFSCs）的物理化学性质和形态结构。由于具有不同的表面结构和高比表面积，生物质衍生的活性炭 BFSC1（使用 KOH 活化）和 BFSC2（使用 HPO 活化）在电流密度为 1 A g 时的比电容分别高达 233.48 和 355.8 F g。此外，基于 BFSC 电极的组装式柔性全固态超级电容器装置在 1 A g 时具有 58.67 F g 的高比电容和在 400 W kg 的功率密度下 20.86 Wh kg 的高能量密度。这种简便的方法突出了利用废弃猴面包果壳生产用于可持续电化学储能系统的低成本、绿色和高性能碳基电极材料的令人兴奋的可能性。
