Preparation of supercapacitors based on nanocomposites films of MnO2/CB/C from sodium alginate and MnO2 nanoparticles by direct electrophoretic deposition and carbonization

Li, Yan; Huang, Defa; Shen, Wenjiang

doi:10.1016/j.electacta.2015.08.147

Cited by 17 publications

(5 citation statements)

References 27 publications

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“…34 As depicted in Figure 2f, there are generally three O-containing groups within the fibers, CO at 531.0 eV, C−OH/C−O−C at 532.4 eV, and COOH at 535.4 eV. 35,36 For all as-studied fibers, CO, C−OH/C−O−C, and COOH groups could be detected, but the HPCNFs have relatively high contents of CO and COOH groups derived most probably from SA, 37,38 whose XPS spectrum is shown in Figure S5. Nevertheless, it is well-known these functional groups can provide certain pseudocapacitances for the fibers.…”

Section: Acs Sustainable Chemistry and Engineeringmentioning

confidence: 99%

Effects of Sodium Alginate on the Composition, Morphology, and Electrochemical Properties of Electrospun Carbon Nanofibers as Electrodes for Supercapacitors

Zhang

Wang

Zhao

et al. 2018

ACS Sustainable Chem. Eng.

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Heteroatoms-doped porous carbon nanofibers (HPCNFs) are fabricated through electrospinning of polyacrylonitrile and poly(methyl methacrylate) in N,N-dimethylformamide with sodium alginate as additive, followed by pyrolysis. The morphology and composition of the as-fabricated HPCNFs have been characterized comprehensively by a variety of methods, including scanning and transmission electron microscopies, X-ray photoelectron spectroscopy, and other spectroscopic measurements. Supercapacitors are assembled with the as-obtained HPCNFs as electrodes, and their electric capacitance performances are investigated. The supercapacitors show high specific capacitance (253.2 F/g at 0.25 A/g in 1 M H2SO4 aqueous electrolyte), excellent rate capability, and prominent cycling durability (with capacitance maintenance of 99.8% after 10 000 cycles). It has also been illustrated that the heteroatom content and the morphology of porous carbon nanofibers can be simply tuned by varying the content of SA in the precursor solution, which determine finally the electrochemical performances of HPCNFs as the electrodes in supercapacitors.

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Section: Acs Sustainable Chemistry and Engineeringmentioning

confidence: 99%

Effects of Sodium Alginate on the Composition, Morphology, and Electrochemical Properties of Electrospun Carbon Nanofibers as Electrodes for Supercapacitors

Zhang

Wang

Zhao

et al. 2018

ACS Sustainable Chem. Eng.

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“…Figure d and e shows the detailed XPS spectra of N 1s and O 1s of PPLCNFs-0.5g, respectively. The XPS survey of O 1s shows peaks at 531.2 and 532.4 eV, assigned to CO and C–OH, respectively. , Relative content is 39.9% (CO) and 60.1% (C–OH), respectively. It has been reported that oxygen-containing functional groups can provide pseudocapacitance .…”

Section: Resultsmentioning

confidence: 99%

“…OH, respectively. 34,35 Relative content is 39.9% (CO) and 60.1% (C−OH), respectively. It has been reported that oxygen-containing functional groups can provide pseudocapacitance.…”

Section: Resultsmentioning

confidence: 99%

Facile Preparation of Low-Cost and Cross-Linked Carbon Nanofibers Derived from PAN/PMMA/Lignin as Supercapacitor Electrodes

Xuan¹,

Liu²,

Wang³

et al. 2020

Energy Fuels

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To develop economical and high-performance water electrolyte supercapacitor electrodes, low-cost and cross-linked carbon nanofibers (CNFs) were prepared with an electrospinning method by using PAN, lignin, and PMMA as precursors. The addition of lignin not only reduces the cost of the carbon nanofibers but also increases the specific surface area of the CNFs by removing carbonyls, and phenol functional groups of lignin during thermal treatment. The effect of PMMA addition was investigated to prepare the optimal candidate for the supercapacitor electrodes. The results showed that the CNFs from PAN, PMMA, and lignin (PPLCNFs-x, x is the content of PMMA in the spinning solution) showed excellent electrochemical performance in alkaline aqueous electrolyte. PPLCNFs-0.5g showed specific capacitance of 233 F g1– at 0.5 A g–1, an outstanding stability of 96.8% when it was cycled 50 000 times at 2 A g–1, and it remained 54.5% of rate capability as current density raising from 0.5 to 100 A g–1. The outstanding electrochemical performance of PPLCNFs-0.5g is expected as a consequence of the synergistic effect of larger specific surface area and cross-linked structure. The cross-linked structure ensures rapid transmission of electrons on the carbon nanofiber membrane, and the large specific surface area is conducive to charge storage. This method offers a new preparation approach for synthesizing high performance CNFs with low-cost, cross-linked structures.

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“…There are three processes comprising EPD: nanoparticle charging, migration, and deposition. According to Ishihara’s theory, , the weight and thickness of deposition are mainly affected by the deposition time and applied potential, providing that the concentration of the particles, their ζ-potential, and the distance between the electrodes are fixed. Therefore, we examined the effect of the deposition time on film thickness applying a constant potential of −50 V and a solution with a 6:4 ratio between NCO and KB.…”

Section: Resultsmentioning

confidence: 99%

Controllable Assembly of Hybrid Electrodes by Electrophoretic Deposition for High-Performance Battery–Supercapacitor Hybrid Devices

Ouyang

Geuli

Hao

et al. 2020

ACS Appl. Energy Mater.

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Hybrid electrodes, which are made of a physical (electrical double layer) storage component and a chemical (battery-type) material, have shown great potential in battery–supercapacitor hybrid (BSH) devices. Here, we present an approach which is based on electrophoretic deposition (EPD) as a means of assembling a binder-free, high-performance BSH device. Ketjenblack (KB) used as the physical storage material and NiCo2O4 (NCO) as the chemical storage compound were dispersed in the presence of Ni2+. The latter assisted in positively charging the surface of both materials and thus resulted in similar deposition rates by EPD on nickel foam (NF). This enabled us to nicely control the NCO to KB ratio in the hybrid electrode and optimize its performance. In this binder-free hybrid electrode, the KB chains served as a fast electron path providing high conductivity for the NCO electroactive material. More importantly, the KB chains could remain in contact with NCO coping with the mechanical stress during the electrochemical reaction. As a result, the optimized hybrid electrode showed high specific capacity (460 C g–1 at 1 A g–1) and excellent cycling performance (82.5% retention after 15 000 cycles). The BSH device was assembled with the hybrid electrode (NF/NCO-KB) as positive and activated carbon as negative electrodes, and exhibited high energy density of 53.0 Wh kg–1 at power density of 746 W kg–1 and outstanding cycling performance of 88.6% retention after 10 000 cycles.

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Preparation of supercapacitors based on nanocomposites films of MnO2/CB/C from sodium alginate and MnO2 nanoparticles by direct electrophoretic deposition and carbonization

Cited by 17 publications

References 27 publications

Effects of Sodium Alginate on the Composition, Morphology, and Electrochemical Properties of Electrospun Carbon Nanofibers as Electrodes for Supercapacitors

Effects of Sodium Alginate on the Composition, Morphology, and Electrochemical Properties of Electrospun Carbon Nanofibers as Electrodes for Supercapacitors

Facile Preparation of Low-Cost and Cross-Linked Carbon Nanofibers Derived from PAN/PMMA/Lignin as Supercapacitor Electrodes

Controllable Assembly of Hybrid Electrodes by Electrophoretic Deposition for High-Performance Battery–Supercapacitor Hybrid Devices

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