Influence of gamma irradiation exposure on the performance of supercapacitor electrodes made from oil palm empty fruit bunches. (1st January 2015)

• Record Type: Journal Article
• Authors: Mohd Nor, Najah Syahirah; Deraman, Mohamad; Omar, Ramli; Awitdrus, ; Farma, Rakhmawati; Basri, Nur Hamizah; Mohd Dolah, Besek Nurdiana; Mamat, Nurul Fatin; Yatim, Baharudin; Md Daud, Mohd Norizam
• Is Part Of: Energy. Volume 79:(2015)
• Page Start: 183
• Page End: 194
• Publication Date: 2015-01-01
• Subjects: Supercapacitor -- Gamma irradiation -- Carbon electrode -- Specific power -- Specific energy; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2014.11.002
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: Carbon-monolith electrodes for supercapacitors were prepared from GMs (green monoliths) made from pre-carbonized fibers of oil palm EFB (empty fruit bunches) and GMs of pre-carbonized EFB fibers exposed to gamma radiation at 5 kGy, 15 kGy, and 20 kGy. GMs and irradiated GMs were carbonized and activated to prepare ACM (activated-carbon-monolith) electrodes. The gamma radiation affected the pore structure of the ACM electrodes and the electrochemical performance of the supercapacitors; irradiation doses of 0 kGy, 5 kGy, 15 kGy and 20 kGy produced specific capacitances of 121 F g −1, 196 F g −1, 11 F g −1, and 12 F g −1, respectively. The irradiation dose of 5 kGy appears to be optimum and produces a specific power and specific energy of 236 W kg −1 and 5.45 W h kg −1, respectively, representing 34% and 60% increases over ACM electrodes prepared from non-irradiated GMs. Highlights: Green monoliths were prepared from pre-carbonized fibers of oil palm fruit bunches. Green monoliths were irradiated with gamma rays at doses from 5 to 20 kGy. Green monoliths were carbonized and activated to prepare activated carbon electrodes. A 5 kGy dosage produce the best supercapacitor electrode. Specific power and energy improved of 34% and 60%, respectively, were obtained after the 5 kGy dosage.