DICP OpenIR
Mass-transport-controlled, large-area, uniform deposition of carbon nanofibers and their application in gas diffusion layers of fuel cells
Tang, Xian1; Xie, Zhiyong1; Huang, Qizhong1; Chen, Guofen1; Hou, Ming2; Yi, Baolian2
Source PublicationNANOSCALE
2015
DOI10.1039/c5nr00022j
Volume7Issue:17Pages:7971-7979
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS KeywordCHEMICAL-VAPOR-DEPOSITION ; MICRO-POROUS LAYER ; MICROPOROUS LAYER ; WATER TRANSPORT ; CATALYTIC DECOMPOSITION ; IMPEDANCE SPECTROSCOPY ; GRAPHITE NANOFIBERS ; OXYGEN REDUCTION ; EPITAXIAL GROWTH ; GRAPHENE OXIDE
AbstractThe effect of mass transport on the growth characteristics of large-area vapor-grown carbon nanofibers (CNFs) was investigated by adjusting the substrate deposition angle (a). The catalyst precursor solution was coated onto one side of a 2D porous carbon paper substrate via a decal printing method. The results showed that the CNFs were grown on only one side of the substrate and a was found to significantly affect the growth uniformity. At alpha = 0 degrees, the growth thickness, the density, the microstructure and the yield of the CNF film were uniform across the substrate surface, whereas the growth uniformity decreased with increasing a, suggesting that the large-area CNF deposition processes were mass-transport-controlled. Computational fluid dynamics simulations of the gas diffusion processes revealed the homogeneous distributions of the carbon-source-gas concentration, pressure, and velocity near the substrate surface at alpha = 0 degrees, which were the important factors in achieving the mass-transport-limited uniform CNF growth. The homogeneity of the field distributions decreased with increasing a, in accordance with the variation in the growth uniformity with a. When used as a micro-porous layer, the uniform CNF film enabled higher proton exchange membrane fuel cell performance in comparison with commercial carbon black by virtue of its improved electronic and mass-transport properties confirmed by the electrochemical impedance spectroscopy results.
Language英语
WOS IDWOS:000353981700056
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/146216
Collection中国科学院大连化学物理研究所
Affiliation1.Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Lab Fuel Cells, Dalian 116023, Peoples R China
Recommended Citation
GB/T 7714
Tang, Xian,Xie, Zhiyong,Huang, Qizhong,et al. Mass-transport-controlled, large-area, uniform deposition of carbon nanofibers and their application in gas diffusion layers of fuel cells[J]. NANOSCALE,2015,7(17):7971-7979.
APA Tang, Xian,Xie, Zhiyong,Huang, Qizhong,Chen, Guofen,Hou, Ming,&Yi, Baolian.(2015).Mass-transport-controlled, large-area, uniform deposition of carbon nanofibers and their application in gas diffusion layers of fuel cells.NANOSCALE,7(17),7971-7979.
MLA Tang, Xian,et al."Mass-transport-controlled, large-area, uniform deposition of carbon nanofibers and their application in gas diffusion layers of fuel cells".NANOSCALE 7.17(2015):7971-7979.
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