Nitrogen-doped carbon/graphene hybrid anode material for sodium-ion batteries with excellent rate capability

Abstract

Nitrogen-doped carbon/graphene (NCG) hybrid materials were prepared by an in-situ polymerization and followed pyrolysis for sodium-ion batteries. The NCG has a large interlayer distance (0.360 nm) and a high nitrogen content of 7.54 at%, resulting in a high reversible sodium storage capacity of 336 mAh g -1 at 30 mA g -1 .The NCG shows a sandwich-like structure, i.e. nitrogen-doped carbon nanosheets closely coated on both sides of graphene. The carbon nanosheets shorten the ion

Highly durable organic electrode for sodium-ion batteries via a stabilized α-C radical intermediate

“…It is apparent that the cyclic voltammetry (CV) curve of the first anodic process is quite different from those of subsequent cycles. The well-defined peaks centred at about 0.5 V (versus Na + /Na) only appear in the first CV cycle could be ascribed to the occurrence of some irreversible reactions via the formation of solid electrolyte interface (SEI) film, similar phenomenon generally observed in the other electrodes5455. The same phenomenon could also be seen from the exclusive plateau ranging from 0.8 to 0.4 V of the TSAA and TSAQ first discharge curve.…”

N/S Co‐Doped 3 D Porous Carbon Nanosheet Networks Enhancing Anode Performance of Sodium‐Ion Batteries

“…Clearly,t he contentso fp yridinic Na nd graphitic Ni nN SPCNN-2 are the highest among these samples, which are beneficial for excellent conductivity and superiore lectrochemical performance. [35] The anodic peak suggests that the sodium extraction is over ab road potential range. [16] Figure 6a reveals the initial three cyclic voltammetry (CV) curves of NSPCNN-2 within the range 0.01-3V at 0.2 mV s À1 .…”

“…Upon turning back to 0.05 Ag À1 ,t he restored capacity recovers to 333.8 mA hg À1 .N SPCNN-2 shows outstanding cycling performance and rate capability,w hich are superior to other electrodes. [14,18,35,37] For further elucidation of the remarkable Na-storage performance at high current densities, NSPCNN-2 was evaluated at 0.5 Ag À1 for long-term cycling. [14,18,35,37] For further elucidation of the remarkable Na-storage performance at high current densities, NSPCNN-2 was evaluated at 0.5 Ag À1 for long-term cycling.…”

Direct fabrication of lamellar self-supporting Co3O4/N/C peroxymonosulfate activation catalysts for effective aniline degradation

“…On the one hand, nitrogen doping can significantly improve catalytic performance, which has been used as catalysts in the oxidative dehydrogenation of propane [53,74], oxygen reduction reaction [75], photocatalytic activity improvement [76], supporting palladium catalytic materials [54], and so on as catalysts or catalyst supports. For Co 3 O 4 /N/C compounds, the graphite nitrogen doping can adjust its intrinsic properties, including chemical characteristics and intrinsic electronic structures, as well as introduce the defect sites in the adjacent places, which can lead to asymmetric spin and defect densities [53,[77][78][79]. In addition, the nitrogen atoms into sp 2 -hybridized carbon structure could improve the electron donor ability through the carbon matrix of the conjugated system, causing to improve the catalyst and reactant reaction, which led to the catalytic reaction [80,81].…”