Ammonia-treated biomass carbon for efficient charge storage: role of nitrogen doping in capacitance enhancement

Saka C., Yardım Y., Genel İ.

Journal of Electroanalytical Chemistry, cilt.996, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 996
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.jelechem.2025.119427
  • Dergi Adı: Journal of Electroanalytical Chemistry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, Chimica, Compendex, INSPEC
  • Anahtar Kelimeler: Biomass-derived carbon, Electrochemical energy storage, Nitrogen-doped activated carbon, Pomegranate peel, Supercapacitor electrode
  • Van Yüzüncü Yıl Üniversitesi Adresli: Evet

Özet

In this work, a nitrogen-doped activated carbon (N-NaOH-ACP) was synthesized via ammonia treatment of sodium hydroxide-activated carbon derived from pomegranate peel, a renewable and low-cost biomass waste. Comprehensive characterization using SEM, FTIR, XPS, Raman spectroscopy, EDS, XRD, and nitrogen adsorption–desorption analyses revealed that N-NaOH-ACP possessed a hierarchical porous structure and a high specific surface area of 2085 m2/g. Nitrogen incorporation significantly enhanced the electrochemical performance, delivering a specific capacitance of 338 F/g at 0.4 A/g in a 1 M KCl electrolyte—nearly three times higher than the undoped material. Furthermore, the symmetric supercapacitor device fabricated using N-NaOH-ACP electrodes exhibited excellent cycling durability, retaining 91.9 % of its initial capacitance after prolonged charge–discharge cycles. These findings highlight the beneficial effects of nitrogen doping on capacitive properties and underscore the potential of N-NaOH-ACP as a sustainable and efficient electrode material for advanced energy storage systems.