Nitrogen substituted graphdiyne as electrode for high-performance lithium-ion batteries and capacitors

Herein, pyridinic nitrogen substituted graphdiyne (PyN-GDY) is directly prepared on the surface of copper foil via a facile Glaser-Hay reaction. PyN-GDY comprises GDY-like hybridized sp2 and sp-carbon structures, meanwhile one C atom in benzene ring replaced by pyridinic-N atom. Hence, lithium (Li) atoms intercalated into framework can be stabilized due to interaction between Li pyridinic-N, which further confirmed through theoretical analysis binding energy complex containing PyN-GDY. Moreover, different arrangement monomers during preparation process formed plenty hierarchical pores 2D plane, would shorten diffusion path facilitate delivery Li-ions. Based unique pyridine N doping structure, exhibits outstanding electrochemical performance with superior cycling stability when applied as electrode Li-ion half batteries capacitors.