Nitrogen-doped hollow carbon spheres from bio-inspired dopamine: Hexamethylenetetramine-induced polymerization, morphology control and supercapacitor performance

Yu, Xianghui; Zhao, Ziyan; Yi, Jin-Long; Wang, Fengyun; Zhang, Ruliang; Yu, Qing; Liu, Lei

doi:10.1016/j.jelechem.2021.115735

Cited by 10 publications

(4 citation statements)

References 49 publications

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“…The peak at 1384 cm −1 corresponds to the stretching vibration of -SO 3 [18,19] which is expected since sulfuric acid was used in the preparation of the glycerin-dopamine carbonized. The SEM-image in Figure S3b shows that GdopC presents a compact morphology formed of spherical and irregular shapes, consistent with dopamine and glycerin-carbon materials, respectively, according to the literature [4,20]. Furthermore, the obtained N 2 adsorption isotherm for GdopC (not presented) corresponds to an isotherm characteristic of a non-porous material with A BET ≈ 10 m 2 g −1 in line with previous results [2,4].…”

Section: Characterization Of the Adsorbentssupporting

confidence: 88%

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Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation

et al. 2023

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Glycerin, a low-valued waste from biodiesel production, and dopamine were used as precursors for adsorbent materials. The study is centered on the preparation and application of microporous activated carbon as adsorbent materials in the separation of ethane/ethylene and of gases that are natural gas or landfill gas components (ethane/methane and carbon dioxide/methane). The activated carbons were produced by the following sequence reactions: facile carbonization of a glycerin/dopamine mixture and chemical activation. Dopamine allowed the introduction of nitrogenated groups that improved the selectivity of the separations. The activating agent was KOH, but its mass ratio was kept lower than one to improve the sustainability of the final materials. The solids were characterized by N2 adsorption/desorption isotherms, SEM, FTIR spectroscopy, elemental analysis, and point of zero charges (pHPZC). The order for adsorption of the different adsorbates (in mmolg−1) on the most well performing material—Gdop0.75—is methane (2.5) < carbon dioxide (5.0) < ethylene (8.6) < ethane (8.9).

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Section: Characterization Of the Adsorbentssupporting

confidence: 88%

“…respectively, according to the literature [4,20]. Furthermore, the obtained N2 adsorp isotherm for GdopC (not presented) corresponds to an isotherm characteristic of a porous material with ABET ≈ 10 m 2 g −1 in line with previous results [2,4].…”

Section: Characterization Of the Adsorbentssupporting

confidence: 87%

Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation

et al. 2023

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“…Especially, there was a higher specific capacitance in C@C-2 in contrast to that of other carbonaceous electrode materials, such as N-doped hollow-structured mesoporous carbon nanospheres, N-doped yolk–shell carbon spheres, porous carbon spheres, and N-doped carbon nanobelts (Table S1). ,,− Therefore, the excellent electrochemical properties of C@C-2 may be caused by its high surface area, N doping, abundant porous structure, thinner shell, and more “carbon bridges” connecting to the core of the shell. The capacitance retentions of these samples at a current density range of 0.5–10 A g –1 were 65.2, 65.6, 84.1, 78.2, and 74.5%, respectively (Figure c).…”

Section: Resultsmentioning

confidence: 99%

N-Doped Yolk–Shell Carbon Nanospheres with “Carbon Bridges” for Supercapacitors

Zhang

Jiang

Zou

et al. 2023

ACS Appl. Nano Mater.

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N-doping multilocular carbon spheres are beneficial to improving the electrical property due to their unique pore structure and elemental composition; nevertheless, there is a great challenge to fabricate this structure in a facile way. In this work, an N-doping yolk–shell carbon nanosphere with a “carbon bridges” structure was prepared by domain-limited carbonization of RF@SiO2 (RF = resorcinol-formaldehyde resin) with ethylenediamine (EDA) as the nitrogen precursor. The structure of the “carbon bridges” and the carbon shell’s thickness can be adjusted by controlling the thickness of the silica layer, resulting in a change in morphology (from dense nanospheres to yolk–shell nanospheres). The optimized yolk–shell carbon nanospheres (C@C-2 nanospheres) exhibited high N-doping, an abundant micro-mesoporous structure, and an optimum “carbon bridges” structure, contributing to a high-rate capability in a supercapacitor, which was reflected in the energy storage dynamics. Herein, C@C-2 nanospheres, as an electrode material for supercapacitors, presented a reversible specific capacitance of 373.3 F g–1 at 0.5 A g–1 in 2 M KOH and retained a well-advanced capacitance retention capability (95.8%) at 4 A g–1 for more than 10,000 cycles. This work sheds light on an avenue to design high-performance porous carbons for efficient energy storage.

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“…The rapid development of green energy has put forward great requirements for advanced energy storage devices. − Supercapacitors have the advantages of fast charge–discharge rates, excellent cycle stabilities, and high energy densities, and they have become one of the most attractive research topics. , Commercial supercapacitors often use activated carbon as the electrode due to the high specific surface area (SSA). Unfortunately, the electrochemical behavior of activated carbon is mainly contributed by micropores and it exhibits a sluggish ion diffusion rate and a limited ion-accessible area. , Furthermore, the capacitance performance of porous carbon with a single pore structure is not ideal.…”

Section: Introductionmentioning

confidence: 99%

Chitosan-Based Synthesis of O, N, and P Codoped Hierarchical Porous Carbon as Electrode Materials for Supercapacitors

Zhang

et al. 2021

Energy Fuels

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Reasonable porous structure and proper heteroatom doping have great influences on electrode materials for supercapacitors. Herein, O, N, and P codoped hierarchical porous carbon (ONPC) was synthesized through a one-pot carbonization−activation strategy by using chitosan as the carbon precursor, phosphoric acid as the activator, and melamine foam as the skeleton. The use of melamine foam facilitated the formation of an interconnected carbon framework and introduced more nitrogen functional groups. Owing to the hierarchical pore structure, large surface area (1588 m 2 g −1 ), and significant heteroatom contents of O (8.61%), N (7.95%), and P (1.34%) in the carbon matrix, the 700 °C carbonized sample ONPC-700 had a specific capacitance of 230 F g −1 at 0.2 A g −1 . A high energy density of 7.5 Wh kg −1 at 100 W kg −1 was achieved for the supercapacitor fabricated with two identical ONPC-700 electrodes. Furthermore, the capacitance retention of the device was evaluated to be as high as 86.53% after 8000 cycles.

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Nitrogen-doped hollow carbon spheres from bio-inspired dopamine: Hexamethylenetetramine-induced polymerization, morphology control and supercapacitor performance

Cited by 10 publications

References 49 publications

Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation

Novel Carbonaceous Adsorbents Prepared from Glycerin Waste and Dopamine for Gas Separation

N-Doped Yolk–Shell Carbon Nanospheres with “Carbon Bridges” for Supercapacitors

Chitosan-Based Synthesis of O, N, and P Codoped Hierarchical Porous Carbon as Electrode Materials for Supercapacitors

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