Facile synthesis of nitrogen-doped graphene on Ni foam for high-performance supercapacitors

Facile synthesis of bio-based nitrogen- and oxygen-doped porous carbon derived from cotton for supercapacitors

“…Impressively, as shown in Table 4, under the same testing condition, CDAP800-350 also achieved higher gravimetric capacitances compared to similar carbon materials reported in the literature. 11,14,21,27,28,44,45 Fig. 10(c) shows a Nyquist plot of the symmetric cell of the CDAP800-350-based supercapacitor.…”

A three dimensional N-doped graphene/CNTs/AC hybrid material for high-performance supercapacitors

“…Above results indicate the positive role played by each component. First, N doping has opened the band gap, thus enhancing the redox reactions between the electrolyte ions and hydroquinone molecules; 11,38,53,54 According to the calculation of the binding energy between the potassium ion and nitrogen congurations, the basal-plane pyridinic N and pyrrolic N have larger binding energy with potassium ion, leading to a larger number of ions to be accommodated on the electrode surface. Therefore, the supercapacitor performance was enhanced.…”

“…In the recent years, the supercapacitors, also called ultracapacitors or electrochemical capacitors are excellent alternatives, for their special feature in high power density, exceptional cycling stability, rapid charging/discharging rate, and low maintenance costs. However, one bottleneck of supercapacitor is the relatively low energy density compared with LIBs, [9][10][11][12][13][14] restraining its potential applications to some extents. Thus, how to improve the energy density and at the meantime maintain the high power density and reversibility is the key step to real practical application.…”

“…18,23 In order to address the above issues and further enhance the performance of the electrochemical capacitors, scientic researchers have focused their attention on developing various methods to enlarge the space between the graphene sheets and open the bandgap of the nal materials, such as introducing the intercalation reagents, creating the porous structure, constructing the three dimensional (3D) matrix of graphene-based materials, and heteroatom doping. 7,10,11,24 The feasibility of above mentioned strategies have been proven by vast amounts of representative works, such as graphene/MnO 2 , graphene/Co 3 O 4 , graphene/ polypyrrole, boron and nitrogen doped graphene and so on. 21,[25][26][27][28] However, to the best of our knowledge, few researches have been presented about the polymer or metal-free carbon materials with relatively high specic capacitance, which will limit their further application in exible and ultralight electronic eld.…”

3D‐foam‐structured nitrogen‐doped graphene‐Ni catalyst for highly efficient nitrobenzene reduction

“…Nickel foam (NF), which can be easily fabricated and is an inexpensive commercial material, exhibits outstanding heat transfer properties, a desirable 3D open‐pore structure and suitable mechanical strength and has been widely employed as a substrate template in the preparation of 3D‐structured graphene . For example, the combination of 2D NG and 3D NF has exhibited high performance in electrochemical catalysis . Nevertheless, to the best of our knowledge, the use of 3D‐foam‐structured nitrogen‐doped graphene‐Ni (NG/NF) catalysts for the reduction of nitrobenzene has been rarely reported.…”