Chen Zhimin, Wang Xiaofeng, Li Wei, Yang Xiaomin, Qiu Jieshan, Wang Zichen
College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China.
School of Chemical Engineering, Changchun University of Technology, Changchun, 130012, P. R. China.
ChemSusChem. 2022 Jan 10;15(1):e202101918. doi: 10.1002/cssc.202101918. Epub 2021 Dec 2.
Lignocellulose-based hierarchical porous carbon is a very promising electrode material for supercapacitors, but lower volumetric energy density and yield have hindered its practical applications. Herein, a low-temperature dehydration carbon-fixation method using NH Cl as modification reagent was developed to prepare rice husk-based hierarchical porous carbon (RHPC) with high volumetric performance and yield. The RHPC-N electrode exhibited a higher volumetric specific capacitance of 134.4 F cm than that of the RHPC electrode (98.4 F cm ) in 1 m Et NBF /propylene carbonate electrolyte. The volumetric energy density (28.8 Wh L ) of the RHPC-N electrode was 37.1 % higher than that of the RHPC electrode (21.0 Wh L ), which greatly enhanced the practical application potential of RHPC in supercapacitors. Moreover, the yield of RHPC increased 1.2 times by this method, which greatly improved the production capacity and reduced the cost. This research establishes a simple and highly efficient method to improve the volumetric energy density and the yield of lignocellulose-based hierarchical porous carbon.
木质纤维素基分级多孔碳是一种非常有前景的超级电容器电极材料，但较低的体积能量密度和产率阻碍了其实际应用。在此，开发了一种以氯化铵为改性试剂的低温脱水碳固定方法，以制备具有高体积性能和产率的稻壳基分级多孔碳（RHPC）。在1 m EtNBF/碳酸丙烯酯电解质中，RHPC-N电极的体积比电容为134.4 F cm，高于RHPC电极（98.4 F cm）。RHPC-N电极的体积能量密度（28.8 Wh L）比RHPC电极（21.0 Wh L）高37.1%，这大大增强了RHPC在超级电容器中的实际应用潜力。此外，通过这种方法，RHPC的产率提高了1.2倍，大大提高了生产能力并降低了成本。本研究建立了一种简单高效的方法来提高木质纤维素基分级多孔碳的体积能量密度和产率。
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