The resorcinol-melamine-formaldehyde (RMF) resin as a promising carbon precursor has aroused wide public concern due to its low cost, high nitrogen content, and ease of industrial production. In this work, the tank-like resorcinol–melamine-formaldehyde (RMF) resin spheres are synthesized via the hydrothermal method with the F127 assisting and tank-like porous carbon spheres (TPCSs) are further prepared by pre-carbonization and KOH treatment. The F127 is crucial in the formation of tank-like resin spheres and the influence of KOH dosage and activation temperature on morphology, particle size, structure, and electrochemical performances for resin-based carbon spheres are explored in detail. The particle size of RMF resin and TPCSs-2-600 mainly locate at 1.75~2.75 µm and 1~1.8 µm, respectively. TPCSs-2-600 possesses the specific surface area of 1338 m2 g-1 and a high N content of 11.49%. The specific capacitance of TPCSs-2-600 is highly up to 328 F g-1 at the current density of 1 A g-1 and still reaches 234 F g-1 when current density increases from 1 to 50 A g-1 with the capacitance retention of 71.3%, and the proportion of pseudocapacitance for total specific capacitance is as high as 67.1% at 1 A g-1. The cycle stability of TPCSs-2-600 can be 87.8% after 10000 times charge-discharge cycles at 10 A g-1 in two-electrode system.

Active carbon

10.2139/ssrn.4425255

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Citations (1)

Facile self-templating large scale preparation of biomass-derived 3D hierarchical porous carbon for advanced supercapacitors

Journal of Materials Chemistry A (2015)

Shijiao Song Fangwei Ma Guang Wu Di Ma Weidan Geng

Corn husk, a renewable biomass, has been successfully explored as a low-cost crude carbon source to prepare advanced higher-value 3D HPCs by means of KOH pre-treatment and direct pyrolysis, the synthesis route is simple, self-templating and easy to scale-up for industrialization.

Husk

Carbon fibers

10.1039/c5ta04721h

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Citations (458)

Supercapacitor performance of hollow carbon spheres by direct pyrolysis of melamine-formaldehyde resin spheres

Chemical Research in Chinese Universities (2013)

Fangwei Ma Liping Sun Hui Zhao Qiang Li Li‐Hua Huo

Heteroatom

Carbon fibers

10.1007/s40242-013-3181-9

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Citations (15)

Lamellar Hierarchical Porous Carbon Prepared from Coal Tar Pitch through a Lamellar Hard Template Combined with the Precarbonization and Activation Method for Supercapacitors

ACS Applied Energy Materials (2022)

Yuchen Jiang Zhifeng He Xin Cui Zeyi Liu Jiafeng Wan

The lamellar porous carbon favors the diffusion and penetration of electrolyte ions and presents a fantastic advantage as an energy storage electrode material. In this work, the lamellar Mg5(OH)4(CO3)2·4H2O template is synthesized via a simple precipitation method in the low-temperature hydrothermal condition. Lamellar hierarchical porous carbon (LHPC) is successfully synthesized through the Mg5(OH)4(CO3)2·4H2O hard template and the KOH activation method using coal tar pitch (CTP) as the carbon source. The effects of activation temperature and activator dosage on the morphology, microstructure, and supercapacitor performance are researched at length. LHPCs-1–700 displays a good lamellar structure and an abundant mesoporous structure, so as to exhibit superior capacitive performance compared with other carbon electrodes. The specific capacitance for LHPCs-1–700 reaches 298 F g–1 at 1 A g–1 and still maintains 234 F g–1 at 50 A g–1 with a high capacitance retention of 78.5% in the three-electrode system. The kinetic behavior of the LHPCs-1–700 electrode was also analyzed according to the CV data obtained at different scan rates, and it was found that the fast kinetic capacitance contribution was up to 87% at 200 mV s–1. The assembled LHPCs-1–700 symmetric supercapacitor delivered an energy density of 16.73 W h kg–1 with a power density of 859.4 W kg–1 in 1 M Na2SO4 solution. Besides, the specific capacitance retention rate could still reach 95.8% after 8000 cycles.

Horizontal scan rate

Carbon fibers

Power density

10.1021/acsaem.2c02866

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Citations (15)