A facile Schiff base chemical approach: towards molecular-scale engineering of N-C interface for high performance lithium-sulfur batteries

Xiao, Zhichang; Kong, Debin; Song, Qi; Zhou, Shanke; Zhang, Yunbo; Badshah, Amir; Liang, Jiaxu; Zhi, Linjie

doi:10.1016/j.nanoen.2018.02.016

Cited by 36 publications

(18 citation statements)

References 63 publications

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“…The BOC@CNT/S cathode exhibits the best electrochemical performances in terms of large reversible capacity and rate capability among various boron/oxygen doped carbons (Table S3, Supporting Information) and these electrochemical properties are also better than previous COF‐derived N‐doped porous carbon . The synergistic effect of CNT and boron/oxygen codoped porous carbon can explain the outstanding electrochemical performance of the BOC@CNT/S cathode.…”

Section: Resultsmentioning

confidence: 92%

“…Among them, N‐doped porous carbons have been extensively studied and proven to effectively enhance the electrochemical performance of Li–S batteries . Recently, Xiao et al reported a type of nitrogen‐rich porous carbon by an interesting strategy based on COF precursor for Li–S batteries . The composite shows long cycling performance with a high specific capacity of 729 mA h g −1 after 500 cycles at 1 C because COF‐derived N‐doped carbon with ordered pore structure can increase electronic conductivity and shorten pathway for ions and electrons.…”

Section: Introductionmentioning

confidence: 99%

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Covalent Organic Framework Derived Boron/Oxygen Codoped Porous Carbon on CNTs as an Efficient Sulfur Host for Lithium–Sulfur Batteries

Chen

et al. 2019

Small Methods

115

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Boron/oxygen co‐doped carbons (BOC) have great potentials as sulfur host materials for lithium–sulfur batteries, because they can increase electronic conductivity and anchor polysulfides. However, the doping interface as a key chemically active site still lacks in‐depth understanding owing to the difficulty in design at the molecular scale. Herein, the BOC network derived from covalent organic framework (COF) is prepared on the surface of CNTs via rational design of the organic condensation reaction. This strategy enables boron and oxygen heteroatoms to be uniformly doped throughout porous carbon because of the uniformly‐distributed two elements in the COF precursor. Thereby, the BOC matrix is demonstrated to play a pivotal role in promoting the chemical absorption of polysulfides and enhancing cycling stability. The BOC@CNT with 68.5% sulfur shows superior lithium polysulfides absorptivity and displays superior electrochemical performances as a cathode for Li–S batteries, including a large reversible capacity (1077 mA h g−1 after 200 cycles at 0.2 C), and outstanding cycling stability (794 mA h g−1 after 500 cycles at 1 C). The demonstrated strategy for fabricating BOC network by COF precursor for Li–S batteries provides a new approach to rationally design uniform heteroatom interfaces for good electrochemical performances.

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Section: Resultsmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Covalent Organic Framework Derived Boron/Oxygen Codoped Porous Carbon on CNTs as an Efficient Sulfur Host for Lithium–Sulfur Batteries

Chen

et al. 2019

Small Methods

115

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“…[35][36][37][38][39][40][41] Furthermore, the last fitting peak appeared in different locations. [26,51] Moreover, the obvious peaks around 1064 and 1401 cm À 1 in FC0 and FCN are assigned to the CÀ C stretching bands [52][53][54] and in plane vibration of CÀ H, [55][56][57][58][59] respectively. [35,38] And the one located at 285.6 eV in FCN was indexed to CÀ O/CÀ N bonds, which due to sp 2 C atoms bonded to N. [36,42,43] Similar to the characterization results of C1s, the signal about N was detected only in FCN, which at binding energy of 400.1 eV and corresponding to pyrrolic N (nitrogen in a five-atom heterocyclic ring).…”

Section: Introductionmentioning

confidence: 99%

Improved Electrochemical Performance of FeF₃ by Inlaying in a Nitrogen‐Doped Carbon Matrix

Zhu

et al. 2019

ChemElectroChem

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FeF 3 is favored by researchers because of its high theoretical specific capacity and high voltage. It is expected to be utilized as a cathode material for lithium-ion batteries in the future. However, the poor electronic conductivity, inferior reaction kinetics, and severe volume expansion seriously prevents its practical application. Herein, a FeF 3 @N-doped carbon nanocomposite was successfully produced by in situ fluorination and dehydration. In addition, the nanocomposite showed a reversible capacity of 84.9 mAh g À 1 for 200th cycle after cycling at a high current of 2 C, which is approximately 300 times higher than that of bare FeF 3 . Benefitting from the N-doped carbon matrix, the composite electrodes exhibited minor transfer resistance (117.4 Ω, only 44.0 % of that of bare FeF 3 ) and very low polarization voltage (ca. 0.19 V). Meanwhile, it provided a buffer for volume expansion during the insertion of Li + and maintained cycling stability. This work can supply a simple pathway for designing ultrahigh-rate and long-life FeF 3 cathode materials.

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“…The remarkable peak at 398.9 eV can be attributed to pyridine-like nitrogen, [11] provingt hat the axial pyridine groups were successfully anchored on the surfaceo fP y ÀCNTs-O. The small shouldera ta bout 401.3 eV can be assigned to quaternary ammonium-like nitrogen, [16] which could be from as mall amount of protonated pyridine (PyH + )r emaining after the post-treatment of the diazo reaction. To confirmo ur assump- ChemSusChem 2019ChemSusChem , 12,1724ChemSusChem -1731 www.chemsuschem.org tion, the PyÀCNTs-O sample was intentionally protonated with hydrochloric acid and then subjected to XPS.T he XPS result shows that the intensity of the peak corresponding to pyridine at 398.9 eV decreases, but the intensity of the peak at about 401.3 eV increases significantly ( Figure S6).…”

Section: Characterizationo Fc Atalystsmentioning

confidence: 96%

Enhancing CO₂ Electroreduction with Au/Pyridine/Carbon Nanotubes Hybrid Structures

Lian

Niu

et al. 2019

ChemSusChem

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Selective electrochemical reduction of CO2 by using renewable electricity has received considerable attention because of the potential to convert a harmful greenhouse gas into useful chemicals. A high‐performance electrocatalyst for CO2 reduction is constructed based on metal nanoparticles/organic molecule hybrid materials. On the nanoscale, Au nanoparticles are uniformly anchored on carbon nanotubes to afford substantially increased current density, improved selectivity for CO, and enhanced stability. On the molecular level, the catalytic performance is further enhanced by introducing axial pyridine groups to the surface of the carbon nanotubes. The resulting hybrid catalyst exhibits around 93 % faradaic efficiency for CO production over a wide potential range (−0.58 to −0.98 V), a high mass activity of 251 A gAu−1 at −0.98 V in aqueous solution at near‐neutral pH, and strong stability with continuous electrolysis for 10 h at −0.58 V. DFT calculations indicate that the synergistic effects of Au and axial pyridine could dramatically stabilize the key intermediate (*COOH) formed in the rate‐limiting step of CO2 reduction, which effectively lowers the overpotential.

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A facile Schiff base chemical approach: towards molecular-scale engineering of N-C interface for high performance lithium-sulfur batteries

Cited by 36 publications

References 63 publications

Covalent Organic Framework Derived Boron/Oxygen Codoped Porous Carbon on CNTs as an Efficient Sulfur Host for Lithium–Sulfur Batteries

Covalent Organic Framework Derived Boron/Oxygen Codoped Porous Carbon on CNTs as an Efficient Sulfur Host for Lithium–Sulfur Batteries

Improved Electrochemical Performance of FeF₃ by Inlaying in a Nitrogen‐Doped Carbon Matrix

Enhancing CO₂ Electroreduction with Au/Pyridine/Carbon Nanotubes Hybrid Structures

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A facile Schiff base chemical approach: towards molecular-scale engineering of N-C interface for high performance lithium-sulfur batteries

Cited by 36 publications

References 63 publications

Covalent Organic Framework Derived Boron/Oxygen Codoped Porous Carbon on CNTs as an Efficient Sulfur Host for Lithium–Sulfur Batteries

Covalent Organic Framework Derived Boron/Oxygen Codoped Porous Carbon on CNTs as an Efficient Sulfur Host for Lithium–Sulfur Batteries

Improved Electrochemical Performance of FeF3 by Inlaying in a Nitrogen‐Doped Carbon Matrix

Enhancing CO2 Electroreduction with Au/Pyridine/Carbon Nanotubes Hybrid Structures

Contact Info

Product

Resources

About

Improved Electrochemical Performance of FeF₃ by Inlaying in a Nitrogen‐Doped Carbon Matrix

Enhancing CO₂ Electroreduction with Au/Pyridine/Carbon Nanotubes Hybrid Structures