Open AccessNitrogen-doped mesoporous carbon/poly-o-phenylenediamine composites for high-performance hybrid supercapacitor electrodes
Author(s) -
Hao Xu,
Zhun Hu,
Ziwei Meng,
Tong Xue,
Dong Li,
Guoli Fang,
Hongfang Shen
Publication year - 2019
Publication title -
materials research express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 35
ISSN - 2053-1591
DOI - 10.1088/2053-1591/ab2b26
Subject(s) - supercapacitor , mesoporous material , capacitance , electrode , specific surface area , electrochemistry , materials science , polymerization , conductivity , doping , carbon fibers , composite material , nitrogen , analytical chemistry (journal) , chemical engineering , chemistry , polymer , composite number , organic chemistry , catalysis , optoelectronics , engineering
Nitrogen-doped mesoporous carbon/poly-o-phenylenediamine composites (denoted as N-MC/PoPD) were successfully synthesized by sacrificial hard template method followed by in situ oxidation polymerization initiated by FeCl 3 . It is revealed that the resultant N-MC/PoPD composites still remained original graphitization structure and narrow pore size distributions (centered at ∼3.8 nm) but suffered visibly monotonical decrease in specific surface area after oPD was increasingly polymerized onto N-MC with an increase of the mass ratio of PoPD to N-MC from 1:1 to 5:1. As supercapacitor electrode measured by galvanostatic charge-discharge in 6 mol L −1 KOH, a volcano curve was found when plotting specific capacitance of the N-MC/PoPD versus the mass ratio of N-MC to oPD; the N-MC/PoPD(2:1) with moderate surface area and the highest electrochemical conductivity delivered the highest specific capacitance of 229 F g −1 at a current density of 1 A g −1 , which is twice of that obtained on the single N-MC with the maximum surface area. The remarkable enhancement in specific capacitance could be ascribed to the synergistic effect between two components of N-MC and PoPD.