An electrospun hygroscopic and electron-conductive core-shell silica@carbon nanofiber for microporous layer in proton-exchange membrane fuel cell

Lee, Hung-Fan; Wang, Pei-Chin; Chen-Yang, Y. W.

doi:10.1007/s10008-019-04198-5

Cited by 18 publications

(5 citation statements)

References 36 publications

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“…[174] explored the reason behind this improvement in more detail and identified the increase in diffusion through the eMPL, which has higher porosity and pores that are large enough to avoid Knudsen diffusion resistance. Lee et al [175] extended basic construction of the eMPL by adding some partial hydrophilic functionality, which retains water near the membrane and is believed to provide a humidification buffer to maintain ionomer hydration, or to wick excessive water from the catalyst layer (probably both). This approach is similar to adding hydrophilic powders to a traditional MPL [176].…”

Section: Electrospinning For Gdlsmentioning

confidence: 99%

Electrospinning as a route to advanced carbon fibre materials for selected low-temperature electrochemical devices: A review

Wen

Kok

Tafoya

et al. 2021

Journal of Energy Chemistry

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Section: Electrospinning For Gdlsmentioning

confidence: 99%

Electrospinning as a route to advanced carbon fibre materials for selected low-temperature electrochemical devices: A review

Wen

Kok

Tafoya

et al. 2021

Journal of Energy Chemistry

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“…The CNF-Bare shows only the (002) diffraction peaks of carbon with a broad peak around 26°. This result indicates that the amorphous structure is obtained from the as-spun PAN nanofibers after the thermal treatment . In addition, the XRD patterns of CNF-5hTiO 2 , CNF-10hTiO 2 , and CNF-15hTiO 2 reveal both the amorphous phase of carbon and a mixed phase comprising rutile and anatase TiO 2 .…”

Section: Resultsmentioning

confidence: 81%

“…This result indicates that the amorphous structure is obtained from the as-spun PAN nanofibers after the thermal treatment. 33 In addition, the XRD patterns of CNF-5hTiO 2 , CNF-10hTiO 2 , and CNF-15hTiO 2 reveal both the amorphous phase of carbon and a mixed phase comprising rutile and anatase TiO Figure 3b shows the Raman spectra of all samples. The Raman spectra of CNF-5hTiO 2 , CNF-10hTiO 2 , and CNF-15hTiO 2 exhibit a peak at 144 cm −1 (B 1g ) corresponding to the vibration mode of the anatase phase structure.…”

Section: Morphology and Structural Properties Figure 2a− D Represents...mentioning

confidence: 99%

Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes

Wongprasod,

Tanapongpisit,

Laohana

et al. 2024

ACS Appl. Nano Mater.

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A facile fabrication method was introduced to enhance the specific surface area and porosity of the carbon nanofibers. The carbon nanofibers bearing TiO 2 hollow nanosphere electrodes were synthesized using an electrospinning technique followed by heat treatment. Varying amounts of as-prepared TiO 2 hollow nanospheres were incorporated into the polymer precursor to examine their impact on the electrode enhancement. The electrochemical performance of supercapacitor electrodes composed of carbon nanofibers bearing TiO 2 hollow nanospheres was investigated. Results revealed that the specific capacitance of the bare carbon nanofibers electrode (170 F g −1 at a current density of 0.5 A g −1 ) was significantly improved upon when embedded with 5 wt % TiO 2 hollow nanospheres of 191 F g −1 . Additionally, the carbon nanofibers bearing 5 wt % TiO 2 hollow nanosphere electrodes demonstrated excellent cycling stability, retaining 97% of its initial specific capacitance even after 10000 cycles. Additionally, the electrochemical performance of asymmetric supercapacitors from these electrodes was also demonstrated. These findings highlight the ability of as-prepared TiO 2 hollow nanospheres to improve the efficiency of the carbon nanofibers electrode due to the optimum porosity to the amount of TiO 2 hollow nanospheres in the carbon nanofibers, opening up possibilities for the development of high-performance supercapacitors.

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“…Then, the as-spun SiO 2 -PS/PAN nanofibers were pre-oxidized in air at 250°C for 2 h. Subsequently, the fibers were heat-treated in a tube furnace at 900°C under N 2 atmosphere for 4 h to obtain the SiO 2 @NÀ C. Control examples of solid NÀ C and core shell SiO 2 @NÀ C were prepared and characterized according to the literature methods. [29] Preparation of PMo 12 À SiO 2 @N-C nanocomposites SiO 2 @NÀ C (100 mg) were dispersed into 50 mL of water and mixed with PMo 12 (500 mg). The mixture was stirred at room temperature for 24 h. After that, the black solution was centrifuged, and the precipitate was washed with water for 3 times and dried in a vacuum drying chamber under 60°C for 12 h to obtain final products.…”

Section: Preparation Of Sio 2 @N-cmentioning

confidence: 99%

Double‐Shelled Hollow SiO₂@N‐C Nanofiber Boosts the Lithium Storage Performance of [PMo₁₂O₄₀]³⁻

Yang

Jiang

et al. 2021

Chemistry A European J

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Polyoxometalates (POMs)-based materials, with high theoretical capacities and abundant reversible multielectron redox properties, are considered as promising candidates in lithium-ion storage. However, the poor electronic conductivity, low specific surface area and high solubility in the electrolyte limited their practical applications. Herein, a double-shelled hollow PMo 12 À SiO 2 @NÀ C nanofiber (PMo 12 À SiO 2 @NÀ C, where PMo 12 is [PMo 12 O 40 ] 3À , NÀ C is nitrogen-doped carbon) was fabricated for the first time by combining coaxial electrospinning technique, thermal treatment and electrostatic adsorption. As an anode material for LIBs, the PMo 12 À SiO 2 @NÀ C delivered an excellent specific capacity of 1641 mA h g À 1 after 1000 cycles under 2 A g À 1 . The excellent electrochemical performance benefited from the unique double-shelled hollow structure of the material, in which the outermost NÀ C shell cannot only hinder the agglomeration of PMo 12 , but also improve its electronic conductivity. The SiO 2 inner shell can efficiently avoid the loss of active components. The hollow structure can buffer the volume expansion and accelerate Li + diffusion during lithiation/delithiation process. Moreover, PMo 12 can greatly reduce charge-resistance and facilitate electron transfer of the entire composites, as evidenced by the EIS kinetics study and lithium-ion diffusion analysis. This work paves the way for the fabrication of novel POM-based LIBs anode materials with excellent lithium storage performance.

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An electrospun hygroscopic and electron-conductive core-shell silica@carbon nanofiber for microporous layer in proton-exchange membrane fuel cell

Cited by 18 publications

References 36 publications

Electrospinning as a route to advanced carbon fibre materials for selected low-temperature electrochemical devices: A review

Electrospinning as a route to advanced carbon fibre materials for selected low-temperature electrochemical devices: A review

Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes

Double‐Shelled Hollow SiO₂@N‐C Nanofiber Boosts the Lithium Storage Performance of [PMo₁₂O₄₀]³⁻

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An electrospun hygroscopic and electron-conductive core-shell silica@carbon nanofiber for microporous layer in proton-exchange membrane fuel cell

Cited by 18 publications

References 36 publications

Electrospinning as a route to advanced carbon fibre materials for selected low-temperature electrochemical devices: A review

Electrospinning as a route to advanced carbon fibre materials for selected low-temperature electrochemical devices: A review

Porous Electrospun Carbon Nanofibers Bearing TiO2 Hollow Nanospheres for Supercapacitor Electrodes

Double‐Shelled Hollow SiO2@N‐C Nanofiber Boosts the Lithium Storage Performance of [PMo12O40]3−

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Product

Resources

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Porous Electrospun Carbon Nanofibers Bearing TiO₂ Hollow Nanospheres for Supercapacitor Electrodes

Double‐Shelled Hollow SiO₂@N‐C Nanofiber Boosts the Lithium Storage Performance of [PMo₁₂O₄₀]³⁻