Nitrogen/sulfur codoped FCC-slurry-based porous carbon materials in symmetric supercapacitors

In this work, we used fluid catalytic cracking (FCC) slurry as a carbon source, concentrated sulfuric acid as a sulfur source, and urea as a nitrogen source to prepare N/S-doped carbon material. Preliminary modification of FCC slurry used the oxidizing and sulfonating effects of concentrated sulfuric acid, then urea was added to continue the preparation procedure. Finally, carbonization resulted in a micro/mesoporous carbon material with a high...