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

  • Hung-Fan Lee
  • Pei-Chin Wang
  • Yui Whei Chen-YangEmail author
Original Paper
  • 6 Downloads

Abstract

In this study, a novel core-shell silica@carbon nanofiber (SiO2@C) is successfully prepared via coaxial electrospinning technique with optimized parameters followed by heat treatment. The characterizations of the nanofiber are carried out by a combination of X-ray diffraction measurement, electrical conductivity test, tensile test, thermogravimetric analysis, nitrogen isotherm adsorption-desorption analysis, mechanical strength test, and water uptake measurement. It is found that the hygroscopic mesoporous SiO2 is contained in a core and the hydrophobic electron-conductive carbon is in a shell that has porous channels. The BET surface area, pore volume, electrical conductivity, mechanical strength, and water uptake of SiO2@C are all superior to that of pure carbon nanofiber. These superior properties make SiO2@C a potential microporous layer (MPL) material, benefitting the water management ability of proton-exchange membrane fuel cells (PEMFCs). The result of the single-cell performance tests shows that under 99.9% or 15% relative humidity (RH) in the temperature range of 50–80 °C, the power densities of the PEMFC fabricated with the SiO2@C-based MPL are all significantly higher than that of the pure carbon nanofiber-based MPL, and 66~302% higher than that of the traditional hydrophobic carbon black powder-based MPL. This study indicates that the as-prepared novel core-shell SiO2@C nanofiber is a promising MPL material for PEMFC.

Keywords

Silica Carbon Core-shell nanofiber Microporous layer Proton-exchange membrane fuel cell 

Notes

Funding information

The authors would like to thank the Ministry of Science and Technology, Taiwan, R.O.C. for supporting the research work under grant MOST 103-2113-M-033-002 and the Chung Yuan Christian University for supporting the research work.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10008_2019_4198_MOESM1_ESM.docx (376 kb)
ESM 1 (DOCX 375 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of ChemistryChung Yuan Christian UniversityChung-LiRepublic of China
  2. 2.Center for Nanotechnology and Center for Biomedical TechnologyChung Yuan Christian UniversityChung-LiRepublic of China

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