Co nanoparticles embedded in wheat-like porous carbon nanofibers as bifunctional electrocatalysts for rechargeable zinc-air batteries

Wu, Mingxing; Tian, Xiyao; Yang, Wenlu; Guo, Bingran; Guo, Jianing

doi:10.1016/j.electacta.2022.140090

Cited by 9 publications

(4 citation statements)

References 34 publications

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“…In recent years, MOFs have received extensive attention as precursors for the fabrication of 1D carbon materials. [25][26][27][28]30 Through the selection of suitably structured MOFs, carbon materials with distinct 1D architecture can be directly obtained by means of pyrolysis at an optimal temperature. The resulting catalysts retain a 1D morphology and inherit the advantages of high porosity and an adjustable pore structure, contributing to enhanced ORR performance.…”

Section: Morphology Design and Constructionmentioning

confidence: 99%

“…In recent years, numerous monometallic carbon materials have been successfully developed and employed as ORR catalysts. 25,[94][95][96] These monometallic catalysts have demonstrated improved stability and ORR activity, thanks to the formation of metal-N x (M-N x ) sites, where the metal element is coordinated to adjacent N. These M-N x sites offer high atomic utilization and activity. 34,97,98 Transition metals are commonly utilized as the metal element in M-N x active sites due to their unfilled valence d orbitals, which confer variable valence states and high electron transfer capability.…”

Section: Chemical Compositionsmentioning

confidence: 99%

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Structural and compositional analysis of MOF-derived carbon nanomaterials for the oxygen reduction reaction

Zhang,

Xu,

Zhang

et al. 2024

Chem. Commun.

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Section: Morphology Design and Constructionmentioning

confidence: 99%

Section: Chemical Compositionsmentioning

confidence: 99%

Structural and compositional analysis of MOF-derived carbon nanomaterials for the oxygen reduction reaction

Zhang,

Xu,

Zhang

et al. 2024

Chem. Commun.

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“…Carbon felt is a polyacrylonitrile (PAN) or viscose fiber that has been needle-punched to form a structure and carbonized at 1200 -1600 • C or graphitized at 2000 -2600 • C [1]. Carbon felt is widely used in redox-flow batteries [2][3][4][5][6][7], lithium-, sodium-and zinc-ion batteries [8][9][10][11][12][13][14][15], as well as in supercapacitors [16][17][18][19][20][21] and alternative energy storage and generation technologies [22][23][24][25]. Mingxing Wu et al have shown that the inclusion of cobalt particles in carbon fibers [13] increases the efficiency of the zinc-air battery, and boron doping [16] improves their capacitive properties when used as supercapacitor electrodes.…”

Section: Introductionmentioning

confidence: 99%

“…Carbon felt is widely used in redox-flow batteries [2][3][4][5][6][7], lithium-, sodium-and zinc-ion batteries [8][9][10][11][12][13][14][15], as well as in supercapacitors [16][17][18][19][20][21] and alternative energy storage and generation technologies [22][23][24][25]. Mingxing Wu et al have shown that the inclusion of cobalt particles in carbon fibers [13] increases the efficiency of the zinc-air battery, and boron doping [16] improves their capacitive properties when used as supercapacitor electrodes. In addition, carbon fibers are used in the synthesis of electrocatalysts for the reaction of hydrogen, oxygen production and the Fenton process [26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the electrochemical active surface area for carbon felt and nanostructured Ni coatings as electrocatalysts for hydrogen evolution reaction

Dmitriev,

Tenevich

2023

Nanosystems: Phys. Chem. Math.

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This study is devoted to the evaluation of electrochemical active surface area (ECSA) for carbon felt used in various fields of electrochemical technology. For the evaluation, we used techniques based on Faraday's law, the Randles-Sevcik equation and the calculation of the electric double layer capacitance in the electrolyte with different pH value. The measurement results are consistent with each other and for neutral, acidic and alkaline medium, the ECSA value are 20 -30, 30 -40 and 50 -90 cm 2 per 1 cm 2 of geometric surface, respectively. Based on the results, the synthesis of nanostructured nickel coatings on carbon felt with prior electrochemical activation was performed. The pre-treatment in 1M KOH vs 1 M Na 2 SO 4 reduces the crystallite size from 26 to 15 nm and increases the ECSA from 133 to 700 cm 2 per 1 cm 2 of geometric surface. These changes cause an improvement in other electrocatalytic features for hydrogen evolution reaction. KEYWORDS carbon felt, electrochemical surface area, electrodeposition, voltammetry, double layer capacitance, Randles-Sevcik equation, nickel coating, hydrogen evolution reaction ACKNOWLEDGEMENTS The authors express their gratitude to the Engineering Center of the St. Petersburg State Institute of Technology for the prompt possibility of performing studies on a scanning electron microscope FOR CITATION Dmitriev D.S., Tenevich M.I. Evaluation of the electrochemical active surface area for carbon felt and nanostructured Ni coatings as electrocatalysts for hydrogen evolution reaction. Nanosystems: Phys.

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Spin Charge of Co Nanoparticles Loaded on the Carbon Substrate Enabling Rate‐Capable Lithium Storage at High Mass‐Loadings

Wang,

Teng,

et al. 2024

Adv Funct Materials

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Developing high mass‐loading electrodes is crucial for enhancing the energy density of current batteries, yet challenges such as poor rate performance and cycling instability must be addressed. Spin charge storage on transition metal nanoparticle surfaces, characterized by rapid charging and the absence of phase transitions, offers an ideal storage behavior for high mass‐loading electrodes. In this study, electrospinning is utilized to fabricate free‐standing carbon nanofibers incorporating Co nanoparticles for high‐mass loading and high‐performance anodes. The resulting anode, with a maximum mass loading of 6.8 mg cm−2, exhibits remarkable cycle stability and high‐rate performance of 2 A g−1 at a capacity over 3 mAh cm−2, superior than reported results. Magnetometry and electron paramagnetic resonance spectroscopy are employed to monitor the charge storage mechanism of the Co@CNFs, involving both the reversible formation of a spin capacitance and the growth of radical anions in the solid electrolyte interface. Additionally, in situ X‐ray diffraction and optical microscopy provide direct evidence of the absence of mechanical stress‐induced phenomena within the spin charge process, attributed to high‐rate capable lithium storage under high mass loading. The strategic approach presented herein offers a reliable methodology for engineering high‐energy‐density lithium‐ion batteries.

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Co nanoparticles embedded in wheat-like porous carbon nanofibers as bifunctional electrocatalysts for rechargeable zinc-air batteries

Cited by 9 publications

References 34 publications

Structural and compositional analysis of MOF-derived carbon nanomaterials for the oxygen reduction reaction

Structural and compositional analysis of MOF-derived carbon nanomaterials for the oxygen reduction reaction

Evaluation of the electrochemical active surface area for carbon felt and nanostructured Ni coatings as electrocatalysts for hydrogen evolution reaction

Spin Charge of Co Nanoparticles Loaded on the Carbon Substrate Enabling Rate‐Capable Lithium Storage at High Mass‐Loadings

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