期刊论文

Wang, Ling;Dai, Lei;Li, Chuanchang

英文

Applied Surface Science

0169-4332

2019

469

423-430

10.1016/j.apsusc.2018.10.220

Representative SEM images of CNF and NCNF at high and low magnifications are shown in Fig. 2. Clearly, all samples show relatively smooth nanofiber surface and homogeneous morphology with diameter of 100–200 nm. The nanofibers interweave with each other, forming the carbon-based network. There is no obvious difference on morphology between CNF and NCNF. And NCNF treated at different temperature exhibits similar morphology. The results reveal that main structure of carbon nanofiber does not

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Carbon nanofiber (CNF) was developed via electrospinning technique with polyacrylonitrile as precursor. Nitrogen-doped carbon nanofiber (NCNF), synthesized by liquid phase dispersion and carbonization processes with urea at 800–1000 °C, were investigated as negative electrode for vanadium redox flow battery (VRFB). Morphology and structure of CNF and NCNF were systematically investigated by SEM, Raman, XPS, etc. The morphology of CNF is not changed by nitrogen doping. However, nitrogen doping can lead to marked enhancement of surface defect a...