▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped graphene having high nitrogen content includes selecting polymer chain comprising aromatic rigid benzimidazole and molecules containing nitrogen-rich elements in imidazole ring and terminal amino group, and soluble poly(2,5-benzimidazole) (ABPBI) as carbon source and nitrogen source, using cationic surfactant-modified montmorillonite hydrophobic interlayer as template, filling the interlayer of the template with soluble ABPBI solution by vacuum assisted method, under inert gas i.e. argon gas protection and conducting pyrolysis in high-temperature furnace. USE - Preparation of nitrogen-doped graphene having high nitrogen content used as oxygen reduction reaction catalyst used in metal air battery or fuel cell, water electrolysis oxygen evolution reaction catalyst, and supercapacitor electrode material (all claimed). ADVANTAGE - The method provides nitrogen-doped graphene with high nitrogen content. DETAILED DESCRIPTION - Preparation of nitrogen-doped graphene having high nitrogen content comprises selecting polymer chain comprising aromatic rigid benzimidazole and molecules containing nitrogen-rich elements in imidazole ring and terminal amino group, and soluble poly(2,5-benzimidazole) (ABPBI) as carbon source and nitrogen source, using cationic surfactant-modified montmorillonite hydrophobic interlayer as template, filling the interlayer of the template with soluble ABPBI solution by vacuum assisted method, under inert gas i.e. argon gas protection, conducting pyrolysis for 2-3 hours in high-temperature furnace, using hydrofluoric acid to remove the template, and obtaining the product.