Abstract
Mesoporous carbons have been successfully synthesized via self-assembly using larch-based resins as precursors and triblock copolymers as soft templates. The porous structure of mesoporous carbons can be tailored by adjusting the ratio of hydrophilic/hydrophobic (EO/PO) units owing to interfacial curvature. Interestingly, the porous structures show a distinct change from vortex-like to worm-like pores, to stripe-like pores, and to ordered two-dimensional hexagonal pores as the ratio of hydrophilic/hydrophobic units increases, indicating the significant effect of EO/PO ratio on the porous structure. The mesoporous carbons as supercapacitor electrodes exhibit superior electrochemical capacitive performance and a high degree of reversibility after 2000 cycles for supercapacitors due to the well-defined mesoporosity of the carbon materials. Meanwhile, the superior carbon has a high specific capacitance of 107 F·g−1 in 6 M KOH at a current density of 10 A·g−1.
Highlights
Due to the increasing sustainable and energy concerns caused by excessive consumption of fossil fuels, energy storage devices, such as fuel cells, lithium-ion batteries, and supercapacitors, are considered alternative candidates for practical applications
When the EO/PO increases from 1 to 1.5, respectively. These results indicate that the EO/PO ratio is of great importance in controlling the porous structure
We report a facile and reproducible approach for the synthesis of mesoporous carbons with different porous structures and tunable pore sizes by using a mixture of F127 and P123 as templates and larch-based resins as carbon sources
Summary
Due to the increasing sustainable and energy concerns caused by excessive consumption of fossil fuels, energy storage devices, such as fuel cells, lithium-ion batteries, and supercapacitors, are considered alternative candidates for practical applications. The carbon precursors with abundant hydroxyl groups can strongly interact with the polar parts of structure-directing block-copolymers, leading to the self-assemble of precursors around micelles These results demonstrated that the wood can be utilized to synthesize the mesoporous carbons with high porosity for supercapacitors. We present a facile synthesis of mesoporous carbons with different porous structures (ordered and disordered) via organic–organic self-assembly using liquefied larch as carbon resources and mixture copolymers as templates. We illustrate the mechanism of the self-assembly and the interaction between larch-based resins and templates, in an attempt to attract more attention and determine the real value of these mesoporous carbons These mesoporous carbons as supercapacitor electrodes are tested to evaluate the capacitive performance, and the effect of the morphology and porous structure of carbons on the electrochemical properties is investigated
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