Chen Chong, Xu Yunzhao, Shao Jiacan, Zhang Yaru, Yu Mengting, Sun Lei, Wang Hongyan, Xie Yong, Zhu Guang, Zhang Li, Pan Likun
Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 234000, PR China; Key Laboratory of Mine Water Resource Utilization of Anhui Higher Education Institutes, Suzhou University, Suzhou 234000, PR China.
Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, School of Chemistry and Chemical Engineering, Suzhou University, Suzhou 234000, PR China.
J Colloid Interface Sci. 2022 Jun 15;616:413-421. doi: 10.1016/j.jcis.2022.02.087. Epub 2022 Feb 22.
In this work, nitrogen and fluorine co-doped porous carbon nanosheets (NFPCNS) were fabricated from pharmaceutical drug residues derived from the fermentation synthesis of lincomycin hydrochloride via high-temperature pyrolysis and subsequent KOH activation without adding any nitrogen and fluorine reagents. The obtained NFPCNS exhibits an optimized integration of three dimensional interconnected nanosheet structure, large specific surface area of 2912 m g, hierarchical porous structure with large mesopore proportion (S/S = 151.5%, V/V = 248.2%) and high level heteroatom content (13.2 at.% O, 4.3 at.% N and 1.0 at.% F). Therefore, NFPCNS based supercapacitors using 1-ethyl-3-methylimidazolium tetrafluoroborate electrolyte exhibit an excellent gravimetric capacitance of 296F g at 1 A g, good rate capability of 65% at 20 A g and high energy density of 125 Wh kg. Furthermore, an ultra-high energy density of 173 Wh kg and a long cycling life with 93% capacitance retention after 2000 cycles has been achieved by NFPCNS based supercapacitors with 1-ethyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide electrolyte. NFPCNS should be a green and efficient electrode materials for next-generation high-energy supercapacitors.
在本工作中，通过高温热解和随后的KOH活化，由盐酸林可霉素发酵合成产生的药物残渣制备了氮氟共掺杂多孔碳纳米片（NFPCNS），且未添加任何氮氟试剂。所获得的NFPCNS展现出三维互连纳米片结构、2912 m²/g的大比表面积、大比例中孔的分级多孔结构（S/S = 151.5%，V/V = 248.2%）以及高含量杂原子（13.2原子% O、4.3原子% N和1.0原子% F）的优化整合。因此，使用1-乙基-3-甲基咪唑四氟硼酸盐电解质的基于NFPCNS的超级电容器在1 A/g下表现出296 F/g的优异比电容、在20 A/g下具有65%的良好倍率性能以及125 Wh/kg的高能量密度。此外，使用1-乙基-3-甲基咪唑双[(三氟甲基)磺酰基]亚胺电解质的基于NFPCNS的超级电容器实现了173 Wh/kg的超高能量密度以及2000次循环后93%电容保持率的长循环寿命。NFPCNS应是下一代高能量超级电容器的绿色高效电极材料。
