Preparation of mesoporous carbon/polypyrrole composite materials and their supercapacitive properties

Abstract

IntroductionMesoporous carbon (MC) is one of the most important carbon materials with high surface area, uniform pore size, and good electric conductivity. During the past ten years, many efforts have been made to develop simple and efficient methods for the preparation of MC materials and to improve their properties for various applications. Recently, one-step soft template methods for MC preparation have gradually replaced time-consuming and tedious two-step hard mesoporous

Nanocarbons in different structural dimensions (0–3D) for phenol adsorption and metal-free catalytic oxidation

“…A few carbon groups, such as C H groups at 2880 cm −1 , C O group at 1700 cm −1 , C C group at 1573 cm −1 , C O group at 1428 cm −1 and 1135 cm −1 can be observed on CMK-3 [39]. After thermal treatment, the C C group at 1562 cm −1 remained strong and other peaks became pale, due to the removal of hydrogen and oxygen groups [40,41]. Meanwhile, C C group at 1559 cm −1 and C O group at 1052 cm −1 can be seen on CMK-8, which showed slight changes to 1560 cm −1 and 1055 cm −1 after annealing.…”

Electropolymerized composite film of polypyrrole and functionalized multi-walled carbon nanotubes: effect of functionalization time on capacitive performance

“…As a result, the energy density and power density of supercapacitors are improved. Besides CNTs, some other carbon materials such as carbon aerogel [38] and mesoporous carbon [39] have also been used to improve the electrochemical performance of polypyrrole in the literatures. Although the initial capacitance of PPy/F-MWNTs composite is lower than that of carbon aerogel modified PPy [38] which is 318 Fg −1 at the scanning rate of 10 mV s −1 , the cycling performance of the former is much better, i.e., capacity retention of 93.49% after 1,000 cycles at 1 A g −1 comparing to that of 50% for the latter.…”

“…Although the initial capacitance of PPy/F-MWNTs composite is lower than that of carbon aerogel modified PPy [38] which is 318 Fg −1 at the scanning rate of 10 mV s −1 , the cycling performance of the former is much better, i.e., capacity retention of 93.49% after 1,000 cycles at 1 A g −1 comparing to that of 50% for the latter. Zou [39] et al studied the supercapacitor performance of mesoporous carbon/polypyrrole composite which gives a specific capacitance of 261 Fg −1 , 238 Fg −1 and 203 Fg −1 , respectively, at the scanning rate of 10 mV s −1 , 20 mV s −1 and 50 mV s −1 . However, PPy/F-MWNTs (24 h) composite in our work still holds a specific capacitance of 220 Fg −1 even at the scanning rate of 200 mV s −1 demonstrating its better rate performance and faster charge/discharge trait.…”