| abstract |
The present invention is a kind of method for preparing three-dimensional grapheme, it is carbon source and nitrogen source with the mPBI in polybenzimidazoles (PBI), it is template with nano silica, iron oxide, iron hydroxide and magnesium oxide particle, uneven finish is in nano grain surface after PBI dissolution, benzimidazole ring in its macromolecule is regularly arranged in template surface, pyrolysis, goes template to obtain three-dimensional nitrogen-doped graphene.It is required that: mPB viscosity average molecular weigh 3 ~ 50,000；The mass ratio that template partial size is both 5 ~ 50nm is 3:1 ~ 1:3；Pyrolysis temperature is 700 ~ 1100 DEG C, is pyrolyzed 2 ~ 3h, is washed 3 times with dilute hydrochloric acid (or hydrofluoric acid), and deionized water is washed 3 times.Catalyst is precipitated for oxygen reduction catalyst, oxygen in the three-dimensional nitrogen-doped graphene of preparation, for fields such as fuel cell, metal-air battery, electrolysis, it can also be used to supercapacitor, lithium ion battery and sensor field. |