| Zinc ion hybrid capacitors (ZIHCs) is an emerging energy storage device with both the high safety of aqueous rechargeable batteries and the excellent charge storage performance of supercapacitors. Nitrogen-doped porous carbon materials were prepared by using an easily available material (humic acid), which exists in abundance in nature, as the precursor, and non-toxic calcium chloride as the template agent, and doping of nitrogen atoms through the addition of melamine, with the joint action of the two. Due to the abundant functional groups and elements contained in the precursor, the prepared material has the advantages used for zinc ion hybrid capacitors, such as: higher degree of graphitization, high specific surface area (997 m2g-1) and heteroatom content. In addition, NPC has many mesopores, which can increase ion transport channels and accessible surface sites, thus further favoring zinc ion shuttling. In the aqueous ZIHCs assembled with NPC-1200 as the cathode material, there was superiority over the undoped samples from 0.1 A g-1 to 10 A g-1, while maintaining an excellent cyclability of 97% after 18,000 cycles. The electrochemical properties indicate that humic acid, which is abundantly available in nature, has potential research value in novel energy storage devices. |