首页|Nitrogen-doped carbon derived from composite of phenolic and amino foam: Effect of synthesis processes on physicochemical properties and super-capacitive performances
Nitrogen-doped carbon derived from composite of phenolic and amino foam: Effect of synthesis processes on physicochemical properties and super-capacitive performances
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NSTL
Elsevier
? 2022Phenolic resin was thermally cured on the melamine-based amino foam fiber to construct a nitrogen-containing composite. By employing the composite as the precursor, nitrogen doped microporous carbons were synthesized by two process schemes. One process was two-step of pre-carbonization and further activation (TNC). Another route was one-step of simultaneous activation and carbonization (ONC). Physicochemical properties of resulting carbons were characterized, and super-capacitive performances were also examined. Specific surface area of TNC and ONC were 1657 and 1223 m2 g?1, respectively. The doped nitrogen in the corresponding carbons were determined to be 2.6 and 3.1 at.%. Using the TNC and ONC as electroactive materials, in a three-electrode test configuration in 6.0 M KOH aqueous electrolyte, the electrode harvests the specific capacitance of 316.4 and 303.8 F g?1 at 1.0 A g?1 current density, respectively. When the current density increased to 10 A g?1, retention rates of the corresponding specific capacitance were 88.7 and 85.9%, respectively. In the symmetric-electrode system in aqueous electrolyte, an electrode enclosed the TNC exhibited a specific capacitance of 269.7 F g?1 at the current density of 0.5 A g?1. The assembled simulated supercapacitor delivered an energy density of 9.6 W h kg?1 with the power density of 124.9 W kg?1. The purpose of the present work was to clarify the effect of preparation procedures on the physicochemical properties and super-capacitive performances of porous carbons. Findings demonstrated that the porous carbon prepared by two-step of pre-carbonization and then reactivation showing larger specific surface area and better super-capacitive performance than that of synthesized via one-step of in situ carbonization and activation.
NSTL
Elsevier
