Metal–Organic Coordination Polymer to Prepare Density Controllable and High Nitrogen-Doped Content Carbon/Graphene for High Performance Supercapacitors

Abstract

Design and preparation of carbon-based electrode material with high nitrogen-doping ratio and appropriate density attract much interest for supercapacitors in practical application. Herein, three porous carbon/graphene (NCG, NCG, and NCG) with high doping ratio of nitrogen have been prepared via directly pyrolysis of graphene oxide (GO)/metal-organic coordination polymer (MOCP) composites, which were formed by reacting 4,4'-bipyridine (BPD) with CuCl, FeCl, and ZnCl, respectively. As-prepared NCG, NCG and NCG showed high nitrogen doping ratio of 10.68, 12.99, and 11.21 at. %; and high density of 1.52, 0.84, and 1.15 g cm, respectively. When as-prepared samples were used as supercapacitor electrodes, NCG, NCG and NCG exhibited high gravimetric specific capacitances of 369, 298.5, 309.5 F g, corresponding to high volumetric specific capacitances of 560.9, 250.7, 355.9 F cm at a current density of 0.5 A g, as well as good cycling stability, nearly 100% of the capacitance retained after 1000 cycles even at a large current density of 10 A g. It is expected that the provided novel strategy can be used to develop electrode materials in high performance energy conversion/storage devices.

Heteroatom-Doped Sheet-Like and Hierarchical Porous Carbon Based on Natural Biomass Small Molecule Peach Gum for High-Performance Supercapacitors

“…23,25 HTC-NPG-C presents a type-II isotherm associated with a nonporous structure. 26,56 The PG-AC, HTC-PG-AC, and HTC-NPG-AC also show type-IV isotherms with steep rise in low relative pressure (P/P 0 < 0.1) and a type-H4 hysteresis loop in middle relative pressure (0.4 < P/ P 0 < 0.9), indicating the presence of abundant micropores and a certain amount of mesopores. 12,53,55 The slight increase of adsorption at high relative pressure (P/P 0 > 0.9) is associated with the presence of macropores.…”

N,P Dual‐Doped Hierarchically Porous Carbon Derived from a Polyelectrolyte Complex as High‐Performance Electrodes for Supercapacitors

“…So, the bonding configurations of heteroatoms in NP‐HPC‐x were further studied on the basis of a high‐resolution XPS spectrum. The N1s spectrum of NP‐HPC‐x can be assigned to four typical peaks located at 398.4, 400.1, 401.2, and 402.0–405.0 eV, corresponding to pyridinic, pyrrolic, graphitic, and oxidized pyridinic nitrogen, respectively . The results (Figure S2, Supporting Information) indicated that increasing carbonization temperature leads to a conversion from pyrrolic nitrogen to graphitic nitrogen .…”

Synthesis and Morphology Evolution of Ultrahigh Content Nitrogen‐Doped, Micropore‐Dominated Carbon Materials as High‐Performance Supercapacitors

“…[1,2] The EDLCs can store electrical energy by utilizing ion absorption/desorptionp rocesses between the electrolyte and electrode materials. [3,4] Generally,ahigh surfacea rea in the porouse lectrode materials is considered as an important factor to prepare high-performance EDLCs. [5] To develop ah ierarchicalp orousa rchitecture is another important strategy for the preparation of excellent supercapacitors.…”