Setaria viridis-like hierarchical structure TiN nanofibers for high-performance supercapacitor.

A setaria viridis-like TiN nanofibers with hierarchical structure (noted HSTFs) is synthesized via electrospinning and hydrothermal method. The results reveal that the synthesized HSTFs nanofibers belong to the TiN crystalline phase. The surface of the fibers is uniformly distributed with pore-structured nanorods, which have an average diameter of 55 nm. The HSTFs exhibits a higher specific surface area. Comparing to the TFs||TFs symmetric supercapacitor device, the HSTFs||HSTFs device demonstrates a significantly higher specific capacitance of 177 F g−1 at a current density of 10 mA g−1. The enhanced electrochemical performance is attributed to the hierarchical and porous structure of TiN fibers, which provides a larger surface contact area and more active sites. This structure is conducive to the construction of a conductive network and improves the reversible proton insertion and chemisorption of electrolyte-electron. This research presents a promising approach for the design and synthesizes of high-performance supercapacitor materials. [Display omitted] • Construction of TiN nanofibers with a setaria viridis-like hierarchical structure. • The assembled supercapacitor of HSTFs.||HSTFs has a large specific capacitance. • The elevation of the specific capacitance was achieved by hierarchical structure. [ABSTRACT FROM AUTHOR]