Multiple Heteroatoms Doped Highly Porous Carbon Nanofibers: Remarkable Oxygen Electrocatalytic Activity at Universal pH and Rechargeable Zinc-Air Batteries
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Herein, the strategy involves doping heteroatom species into PCNFs using a simple electrospinning method. The electrospinning process includes crosslinkers such as boric acid, poly(tetrafluoroethylene) (PTFE), and poly (vinyl alcohol) (PVA), which are crosslinked to form a water-soluble network. PVA was utilized as the carbonized polymer, whereas PTFE was used as a sacrificial polymer that was removed during the processing steps to form a high pores structure. As a result, the as-spun fibers are formed into N, B, and F triply doped PCNFs with a large surface area.Taking advantage of the catalyst's unique features, such as its large surface area and the synergistic effect of N, B, and F co-doping. Additionally, a zinc-air rechargeable battery with N, B, and F doped PCNFs as the air cathode has a long service life and a maximum power density of 151.9 mW cm-2.