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Facile preparation of polybenzoxazine-based carbon microspheres with nitrogen functionalities:effects of mixed solvents on pore structure and supercapacitive performance

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Frontiers of Chemical Science and Engineering 2020年第6期14卷 1072-1086页

作者： uthen thubsuang Suphawadee Chotirut Apisit Thongnok Archw Promraksa Mudtorlep Nisoa Nicharat Manmuanpom Sujitra Wongkasemjit Thanyalak Chaisuwan School of Engineering and Technology Walailak UniversityNakhon Si Thammarat 80160Thailand School of Science Walailak UniversityNakhon Si TTiammarat 80160Thailand The Petroleum and Petrochemical College Chulalongkom UniversityBangkok 10330Thailand Center of Excellence on Petrochemical and Materials Technology Bangkok 10330Thailand

In this study,polybenzoxazine(PBZ)-based carbon microspheres were prepared via a facile method using a mixture of formaldehyde(F)and dimethylformamide(DMF)as the *** PBZ microspheres were successfully obtained at the F/DMF weight ratios of 0.4 and *** microspheres exhibited high nitrogen contents after *** microstructures of all the samples showed an amorphous phase and a partial graphitic *** porous carbon with the F/DMF ratio of 0.4 showed significantly higher specific capacitance(275.1 F·g^-1)than the reference carbon(198.9 F·g^-1)at 0.05 A-g This can be attributed to the synergistic electrical double-layer capacitor and pseudo-capacitor behaviors of the porous carbon with the F/DMF ratio of *** presence of nitrogen/oxygen functionalities induced pseudo-capacitance in the microspheres,and hence increased their total specific *** activation with CO2,the specific surface area of the carbon microspheres with the F/DMF ratio of 0.4 increased from 349 to 859 m^2•g^-1 and the specific capacitance increased to 424.7 F·g^-1 This value is approximately two times higher than that of the reference *** results indicated that the F/DMF ratio of 0.4 was suitable for preparing carbon microspheres with good supercapacitive *** nitrogen/oxygen functionalities and high specific surface area of the microspheres were responsible for their high capacitance.

关键词： PBZ carbon porous materials microsphere supercapacitor

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