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controllable fabrication of nitrogen-doped porous nanocarbons for high-performance supercapacitors via supramolecular modulation strategy

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Journal of Energy Chemistry 2020年第10期29卷 348-357页

作者： Huaxia Chen Xingyu Lu Haihua Wang Dianpeng Sui Fanbao Meng Wei Qi Department of Chemistry College of ScienceNortheastern UniversityShenyang 110819LiaoningChina Shenyang Natural Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110116LiaoningChina

In the present work,we developed a micellar system of milk protein-surfactant(SDS)-graphene to prepare the graphene-based aerogels via hydrothermal and freeze-drying method,in which the novel surface-property of aerogels can be tuned with the decreasing of micellar size in the colloid systems resulting the improved specific surface *** milk protein also severed as green and sustainable sources to introduce nitrogen heteroatoms into the ***,the aerogels were further graphitized and activated to fabricate N-doped porous nanocarbon at 600℃.The initial surface composition and structure of the aerogel,which was proved,has obvious impact on the final structure of the synthesized nanocarbon materials,and thus influence their electrochemical *** optimized nanocarbon materials(MGPC-5),with enhanced specific surface area,degree of graphitization,and nitrogen doping,exhibited excellent capacitance performance and stability in both three-electrode system(518.8 F/g at a current density of 0.1 A/g)and symmetrical electrode system(120.8 F/g at current density of 0.1 A/g and with^95%capacitance retention after 5000 cycles of charging and discharging at 3 A/g)in *** assembled supercapacitor also shows ideal capacitive properties in series and parallel *** with a stable 1.6 V windows in Li2SO4 electrolyte,the symmetric supercapacitor cell exhibits a high energy density up to 36.7 W h/*** present work provides a feasible fabrication method for high-performance supercapacitor based on graphene and biomass derived carbon,the proposed surfaceproperty regulation and supercapacitor performance improvement strategy may also shed light on other energy related materials or system.

关键词： Graphene-based aerogel Milk protein Surfactant controllable surface-property Supercapacitor

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