碳纳米纤维负载铁镍合金在锌空气电池中的应用

析氧反应(OER)催化剂在锌空气电池(ZABs)储能过程中起着关键作用。我们开发了一种新型非贵金属基自支撑碳纳米纤维催化剂(Ni_δFe_4-δ-CNF)。首先，以聚乙烯吡咯烷酮、过渡金属乙酸酯、N,N-二甲基甲酰胺为原料，采用静电纺丝法制备了网状前驱体。随后，通过高温退火处理，将其转化为三维(3D)多孔结构材料。合成的Ni₁Fe₁-CNF催化剂在浓度为1 mol·L^-1KOH的电解质溶液中具有较低的起始电位(230 m V)和过电势(280 mV,10 mA·cm^-2)，性能优于商业RuO₂。同时，将Ni₁Fe₁-CNF催化剂与商业Pt/C催化剂混合，作为空气阴极催化剂组装成ZAB，与商业的RuO₂+Pt/C ZAB相比，Ni₁Fe₁-CNF+Pt/C ZAB具有更高的功率密度(122 m W·cm^-2)、...

Application of Carbon Nanofiber Supported Iron-Nickel Alloy in Zinc-Air Battery

Oxygen evolution reaction(OER)catalysts play an important role in zinc-air batteries(ZABs).A novel non-noble metal-based self-supported carbon nanofiber(Ni_δFe_4-δ-CNF)catalyst was developed.First,the network precursors were prepared from polyvinylpyrrolidone,transition metal acetate,and N,N-dimethylformamide via the electrostatic spinning method.After annealing at high temperature,the precursors were transformed into threedimensional(3D)multi-pore structure material.The synthesized Ni₁Fe₁-CNF catalyst has a lower initial potential(230 mV)and overpotential(280 mV,10 mA·cm^-2)in electrolyte solution of 1 mol·L^-1KOH,and its performance is superior to that of commercial RuO₂.Meanwhile,ZAB was assembled by mixing Ni₁Fe₁-CNF catalyst with commercial Pt/C catalyst as the air cathode.Compared with commercial RuO₂+Pt/C ZAB,Ni₁Fe₁-CNF+Pt/C ZAB had a higher power density(122 mW·cm^-2),lower charging voltage and better charge/discharge cycle stability.