Nitrogen-doped carbon based on peptides of hair as electrode materials for surpercapacitors

- Hair was directly carbonized by environmental and energy-saving methods.
- Hair was utilized to prepare nitrogen-doped carbon materials for supercapacitor.
- A new approache for preparing nitrogen-rich active carbon from biomass waste of hair-like precursor.
- Hair-based carbon having a non-crystalline layered structure and excellent capacitive performance.