Waste-to-energy valorization of local Cydonia oblonga fruit waste into hierarchically porous activated carbon for high-performance electrochemical capacitor electrodes
BIOMASS & BIOENERGY, cilt.217, 2027 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 217
- Basım Tarihi: 2027
- Doi Numarası: 10.1016/j.biombioe.2026.110082
- Dergi Adı: BIOMASS & BIOENERGY
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, BIOSIS, Compendex, Environment Index, Geobase, INSPEC, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
- Kocaeli Üniversitesi Adresli: Evet
Özet
The conversion of agricultural waste into high-value carbon materials represents an attractive strategy for simultaneously addressing biomass disposal and the growing demand for advanced energy-storage materials. In this study, locally sourced Cydonia oblonga (quince) fruit waste was precarbonized (QU) and converted to activated carbons through KOH-assisted chemical activation followed by controlled pyrolysis between 500 and 800 degrees C. The influence of activation temperature on physicochemical and electrochemical properties was systematically investigated using FTIR, SEM/EDX, XRD, BET, CV, GCD, and EIS. Increasing the activation temperature promoted the formation of a carbon-rich, hierarchically porous framework and improved ion-transport kinetics, with QU 800 exhibiting the most favorable performance. Based on electrochemical evaluation, QU 800 delivered 185.0 F g- 1 at 0.5 A g- 1 in 6 M KOH and exhibited lower resistance and superior rate capability, while electrochemical performance was consistently higher in KOH than in 1 M H2SO4. A symmetric QU 800 device operating over 0-1.0 V delivered a single-electrode capacitance of 95.2 F g- 1 and retained approximately 80% capacitance at 2.0 A g- 1. The device achieved 2.29 Wh kg- 1 at 208 W kg- 1 and retained 92.6% of its initial capacitance after 5000 cycles. In support, BET revealed a high surface area of 1249 m2 g- 1, micropore area of 888 m2 g- 1, and a dominant pore width of 2.70 nm, confirming its micro-/mesoporous architecture. These findings demonstrate that quince fruit waste is a sustainable, inexpensive, and alternative abundant precursor for producing high-performance porous carbon electrodes and provide an effective waste-to-energy alternative material pathway source.