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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Heteroatom-doped hierarchical porous carbon aerogels from chitosan for high performance supercapacitors
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Heteroatom-doped hierarchical porous carbon aerogels from chitosan for high performance supercapacitors

机译：来自壳聚糖的杂处理原子掺杂的高性能超级电容器的分层多孔碳气凝聚器

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摘要

Carbon aerogel with various morphology and structural characteristics were prepared from chitosan by freeze drying-carbonization/activation process. The carbon aerogel obtained without activation (CNS-800) exhibited sheet structure and disordered micropores, N mostly existing in the forms of N-5 and N-6 groups. After phosphoric acid activation (CNSP-800), a 3D-honeycomb structure with long-range ordered pore channels was presented, with N-X being themain nitrogen-containing groups, some P-O/P=O and P=C groups were also detected. KOH activation of CNS (CNSK-800) led to the formation of incomplete 3D-mesh structure and some graphite-like structure, which is the most unordered structure attributed to the high intense of KOH activation. All the samples showed micro-mesoporous structure, the specific surface area of CNS-800, CNSk-800 and CNSP-800 were 421, 1215 and 1475m(2)/g, respectively. When used as electrode in the three-electrode supercapacitor, the capacitance values of 171, 318 and 416 F/g were obtained at 1 A/g in 1M H2SO4 electrolyte for CNS-800, CNSK-800 and CNSP-800, with the pseudo capacitance contribution rates of 25.4%, 31.6% and 37.6% respectively. Additionally, the capacitance values were 98, 126 and 168 F/g in the two-electrode system respectively, and their energy densities reached 3.35, 4.69 and 6.36Wh/kg at a power density of 25 W/kg accordingly. (C) 2020 Elsevier B.V. All rights reserved.
机译：具有各种形态和结构特性的碳气凝胶进行冷冻干燥碳化/活化处理从脱乙酰壳多糖制备。无活化得到的碳气凝胶（CNS-800）表现出片结构和无序微孔，N大多存在于的N-5和N-6基团的形式。磷酸活化后（CNSP-800）中，3D-蜂窝结构体具有长程有序的孔通道被提出，用N-X是基团themain含氮，还检测到一些P-O / P = O和P = C基团。 KOH活化导致形成CNS（CNSK-800）的不完全的三维网状结构时，部分石墨状结构，这是归因于高激烈KOH活化的最无序结构。所有样品显示出微 - 中孔结构，CNS-800的比表面积，CNSk-800和CNSP-800分别为421，1215和1475米（2）/克。当作为电极在三电极的超级电容器使用的，在1项所述的获得的171，318和416 F /克电容值/克在1M H 2 SO 4电解质为CNS-800，CNSK-800和CNSP-800，具有伪分别为25.4％，31.6％和37.6％的电容贡献率。另外，电容值分别为98，126和168 F /克在双电极系统，和它们的能量密度在25瓦的功率密度达到3.35，4.69和6.36Wh /公斤/公斤相应。 （c）2020 Elsevier B.v.保留所有权利。

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