Study on Voltage Drop of Vanadium Nitride/Carbon Composites Derived from Pectin/VCl3 Membrane as Supercapacitors Anode Material

The adsorption of metal ions and the further utilization of adsorbent materials help to solve serious environmental pollution, and transforming them into supercapacitor electrode materials could be a promising possibility. Here, we use pectin as a heavy metal ion adsorbent to prepare a series of vanadium-containing precursors, and different vanadium nitride and carbon composites are prepared by annealing with the changing water content in the precursor. By studying these composites, we find that the addition of water can effectively improve the final oxygen content of the product’s chemical oxygen, thereby improving the wettability or hydrophilicity of the composite material. Furthermore, hydrophilicity or wettability improves some electrochemical characteristics, especially the voltage drop. Electrode with high voltage drop has much poor hydrophilicity, and hence a systematic study from phenomena to mechanisms associated with voltage drop is in detail studied.