Nitrogen-doped carbon fiber sponges by using different nitrogen precursors: synthesis, characterization, and electrochemical activity

Rodríguez-Corvera, Cristina L.; Fajardo‐Díaz, Juan L.; Cortés-López, Alejandro J.; Jiménez‐Ramírez, Luis E.; Muñoz‐Sandoval, Emilio; López–Urías, Florentino

doi:10.1016/j.mtchem.2019.100200

Cited by 4 publications

(10 citation statements)

References 70 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…CNX3 tubes (Figure 1C) exhibit much smaller diameter than CNX1 and CNX2, since the pyridine‐based precursors favor entanglement of CNTs during growth. [ 44 ] CNX4 and CNX5 display similar morphologies with similar tube diameters as for CNX3, however displaying much corrugated surface morphology. The combination of dichlorobenzene/ferrocene is more favorable for forming Fe‐filled carbon nanotubes and CNX5 formed the densest structure, probably due to the high‐level of ferrocene used.…”

Section: Resultsmentioning

confidence: 90%

“…The main carbon/nitrogen precursor source, benzylamine, favors the entangled corrugated carbon fibers. [ 44,45 ] Different morphologies and tube size observed in Figure 1 are attributed to different carbon/nitrogen precursor used. [ 44 ] Figure 1A, corresponding to typical CNX1 morphology, shows a twined and bended morphology.…”

Section: Resultsmentioning

confidence: 99%

“…[ 44,45 ] Different morphologies and tube size observed in Figure 1 are attributed to different carbon/nitrogen precursor used. [ 44 ] Figure 1A, corresponding to typical CNX1 morphology, shows a twined and bended morphology. The uniform sizes relate to the toluene precursor, which serves as the carbon source for nanotube growth.…”

Section: Resultsmentioning

confidence: 99%

“…Our previous work has shown the complex behavior during the growth with the carbon and the nitrogen precursor playing an essential role on morphology, surface nitrogen concentration, as well the types of functional groups present at the surface. [ 44 ] When utilized as anodes in LIBs, these CNX sponges present excellent capacity and rate capability, in particular when operated in a narrow potential range of practical relevance between 0.01–1 V (vs. Li + /Li 0 ). We further analyze the correlation between the composition, physico‐chemical and lithium storage properties of the studied CNX materials.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

N‐doped carbon nanotube sponges and their excellent lithium storage performances

et al. 2021

View full text Add to dashboard Cite

Preparation, analysis and lithium storage performance of a series of nitrogen‐doped carbon nanotube sponges (CNX) is presented in this work. The synthesis was performed using an aerosol‐assisted chemical vapor deposition (AACVD) in a bi‐sprayer system by using various carbon and nitrogen precursors made of mixtures of benzylamine with toluene, urea, pyridine and 1,2‐dichlorbenzene, with ferrocene as catalyst. A series of physico‐chemical analysis techniques are used to characterize the composition and the morphology of the obtained materials, and a correlation of these with the lithium storage performances is attempted. The samples reveal an interconnected core‐shell CNX fiber morphology with a CNT‐core surrounded by an amorphous carbon shell. Appealing lithium storage performances are attained, while also considering aspects of safety, low potential, and long‐term cycling stability. The best performing sponges display a high specific capacity (223 mAh g−1) when cycled in a practically relevant voltage window (0.01–1V vs. Li), high first cycle (90%) and long‐term cycling (99.3%) coulombic efficiencies and excellent capacity retention after 1500 cycles. This study further analyses the interplay between the morphology and the physico‐chemistry of nitrogen‐doped carbon nanotube materials for Lithium storage and provides guidelines for future developments.

show abstract

Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

N‐doped carbon nanotube sponges and their excellent lithium storage performances

et al. 2021

View full text Add to dashboard Cite

show abstract

“…This situation could be indicative that the main of the oxygen groups lay in the formation of ethers and ester functionalities. A light protuberance is observed over the −0.1 V that can be related to the influence of nitrogen species like nitrogen doping and N−H functionalities like amines and amides in the oxidation process . Figure b depicts the increase of the discharge rate (10 mV/s to 600 mV/s), showing a growth of capacity almost linear to the potential rate (not showed).…”

Section: Resultsmentioning

confidence: 97%

Furan and Pyran Functional Groups Driven the Surface of Nitrogen‐Doped Nanofiber Sponges

et al. 2020

Self Cite

View full text Add to dashboard Cite

Highly surface oxidized, nitrogen‐doped, and nitrogen functionalized carbon nanotube sponge (N‐CFS) were produced at 1020 °C using two sprayers approach in an aerosol‐assisted chemical vapor deposition (AACVD) experiment. The structure of N‐CFS consisted of entangled and corrugated carbon nanofibers of ∼200 nm diameter, also showing junctions and knots. TEM characterizations revealed that the carbon nanofiber exhibits stacked graphitic layers in a transversal way with positive curvature. Superficial chemical analysis by XPS showed that the N‐CFSs contain an atomic concentration of oxygen and nitrogen of 9.2% and 2.9%, respectively. The high‐resolution XPS scans deconvolution‐analysis revealed high percentages for C−O bonds, pyrrolic nitrogen doping, NH3 functionalization, and Si−C interactions. The cyclic voltammetry measurements did not display a redox process despite the high oxygen concentration at the surface. Hydrophobic functional groups containing C−O bonds do not participate in a redox process (furan, pyran, epoxy, methoxy, ethoxy, among others) could mostly determine the electroactivity of N‐CFS. Based on density functional theory calculations, we determine that the furans transfer a high amount of electron and promote a positive curvature in thin carbon nanotubes. Graphitic materials with furans, pyrans, and epoxy functional groups could be used as an anode in lithium‐ion batteries.

show abstract

Preparation and characterization of melamine-led nitrogen-doped carbon blacks at different pyrolysis temperatures

Öztürk

Yurtcan

2021

Journal of Solid State Chemistry

View full text Add to dashboard Cite

Nitrogen-doped carbon fiber sponges by using different nitrogen precursors: synthesis, characterization, and electrochemical activity

Cited by 4 publications

References 70 publications

N‐doped carbon nanotube sponges and their excellent lithium storage performances

N‐doped carbon nanotube sponges and their excellent lithium storage performances

Furan and Pyran Functional Groups Driven the Surface of Nitrogen‐Doped Nanofiber Sponges

Preparation and characterization of melamine-led nitrogen-doped carbon blacks at different pyrolysis temperatures

Contact Info

Product

Resources

About