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Sustainable supercapacitors of nitrogen-doping porous carbon based on cellulose nanocrystals and urea
International Journal of Biological Macromolecules ( IF 7.7 ) Pub Date : 2020-09-05 , DOI: 10.1016/j.ijbiomac.2020.09.011
Sunan Wang 1 , Lina Dong 2 , Zhouyuan Li 2 , Ning Lin 1 , Hui Xu 2 , Shanmin Gao 2
Affiliation  

The development of porous carbon materials from sustainable natural sources is an attractive topic in the field of energy storage materials. This study proposed the production of nitrogen-doped porous carbon (NPC) materials from the renewable cellulose nanocrystal (CNC) as carbon source and water-soluble urea as nitrogen source without any external activation. The liquid compounding treatment and subsequent carbonization provided the NPC materials a uniform and stable N-doping (7.4% nitrogen content), high specific surface area (366.5 m2/g) and various superior electrochemical properties. The fabricated NPC sample (CU-3, with the weight ratio of 1:10 for CNC and urea) exhibited a high specific capacitance of 570.6 F/g at a current density load of 1 A/g and good cycling stability (91.2% capacitance retention after 1000 cycles at a current density of 10 A/g) in the 6 M KOH electrolyte. Applying this NPC material as the electrode component in the assembled symmetric supercapacitor demonstrated the promising electrochemical stability with the specific capacitances of 88.2 F/g at the current density of 1 A/g and capacitance retention of 99.8% after 5000 cycles. The developed N-doped porous carbon material from CNCs and urea is expected to be a sustainable electrode component for the supercapacitor materials.

中文翻译:


基于纤维素纳米晶和尿素的氮掺杂多孔碳的可持续超级电容器



利用可持续自然资源开发多孔碳材料是储能材料领域的一个有吸引力的话题。本研究提出了从可再生纤维素纳米晶体 (CNC) 作为碳源和水溶性尿素作为氮源生产氮掺杂多孔碳 (NPC) 材料,而无需任何外部活化。液体复合处理和随后的碳化为 NPC 材料提供了均匀稳定的 N 掺杂(7.4% 的氮含量)、高比表面积 (366.5 m2/g) 和各种优异的电化学性能。制备的 NPC 样品 (CU-3,CNC 和尿素的重量比为 1:10)在 1 A/g 的电流密度负载下表现出 570.6 F/g 的高比电容和 6 M KOH 电解液中良好的循环稳定性(在 10 A/g 的电流密度下循环 1000 次后电容保持 91.2%)。将这种 NPC 材料作为电极组件应用于组装的对称超级电容器中,表现出良好的电化学稳定性,在 1 A/g 的电流密度下比电容为 88.2 F/g,5000 次循环后电容保持率为 99.8%。从 CNC 和尿素开发的 N 掺杂多孔碳材料有望成为超级电容器材料的可持续电极组件。
更新日期:2020-09-05
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