No abstract

Highly efficient electrocatalysts for water splitting generally involve noble metals (Pt, Ir, Ru, etc.) or expensive transition metals (Ni, Co, Cu, etc.), which has hindered their widespread application. Here, we...

We reported a controlled synthesis method to obtained carbon spheres with tunable geometry under low ZnCl 2 aqueous solution conditions using polytriazine as a precursor. The polytriazine precursor was polymerized by mixing/reaction of 2,6diaminopyridine and formaldehyde in the presence of a diluted ZnCl 2 aqueous system. The obtained nanospheres were then decomposed to adulterate nitrogen porous carbon nanospheres (N-PCNSs) by the decomposition and blistering process at high temperature by degrees. ZnCl 2 worked as a solid-template and played the role of a stabilizing and foaming agent in the reaction. The as-prepared N-PCNSs with controllable spherical geometry, large micro-/mesoporous volume and high nitrogen content (∼8.5 wt %) were employed in electric double-layer capacitors that have a good specific capacitance (636 F/g at 1 A/g) and are long lasting. Besides, the N-PCNS delivered a high energy density of 22.1 Wh/Kg at a power density of 500 W/kg.

Multi-dimensional nanomaterials have drawn great interest for application in supercapacitors due to their large accessible surface area.

Water phase synthesis of polytriazine nanospheres as the high-nitrogen content carbon spheres precursor for a high-performance EDLC electrode.