Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions
Само за регистроване кориснике
2017
Аутори
Vujković, MilicaMatovic, Ljiljana
Krstić, Jugoslav
Stojmenović, Marija
Dukić, Andelka
Babić, Biljana M.
Mentus, Slavko
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The activated carbon cloth (ACC), obtained by chemical/physical activation of carbonized rayon fibers, was grinded in a ball mill and studied from the aspect of double layer capacitance. The changes in pore structure, morphology and acid/basic properties caused by ball milling were studied by means of N-2 adsorption/desorption, Fourier-transformed infrared spectrometry, Boehm's titration and Scanning Electron Microscopy. Both potentiodynamic and galvanostatic cycling were used to evaluate the double layer capacitance in three alkaline, acidic and neutral aqueous solutions (KOH, H2SO4 and Na2SO4). While double layer capacitance of original ACC was found to be negligible, ball milled material (ACCm) displayed capacitance in the range of supercapacitors. In order to explain this huge capacitance improvement, we found that ball milling substantially increased the concentration of lactone, phenolic and quinone groups on the surface. We suggest that these groups, through improved hydrophilic...ity, enable faster ion diffusion into carbon micropores. The energy density stored by double layer was highest in neutral sodium sulphate solution. Namely, operational voltage of similar to 2 V and double layer capacitance of 220 F g(-1) at 1A g(-1), enable the energy density of ACCm/Na2SO4/ACCm capacitor of 31.7 Wh kg(-1) at 2000 W kg(-1), much higher than that of commercial EDLC carbon capacitors. According to the here presented literature survey in a tabular form, the energy density of the studied sample is also higher from that of numerous thus far published aqueous carbon capacitors.
Кључне речи:
carbon supercapacitor / mechanochemical activation / Na2SO4 aqueous electrolyte / high energyИзвор:
Electrochimica Acta, 2017, 245, 796-806Издавач:
- Oxford : Pergamon-Elsevier Science Ltd
Финансирање / пројекти:
- Литијум-јон батерије и горивне ћелије-истраживање и развој (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45014)
- Синтеза, процесирање и карактеризација наноструктурних материјала за примену у области енергије, механичког инжењерства, заштите животне стредине и биомедицине (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45012)
- Serbian Academy of Sciences and Arts "Electrocatalysis in the contemporary processes of energy conve
- NATO through the Science for Peace Project - EAP. SFPP 984925-DURAPEM
Напомена:
- Peer-reviewed version: http://cer.ihtm.bg.ac.rs/handle/123456789/3011
DOI: 10.1016/j.electacta.2017.06.018
ISSN: 0013-4686
WoS: 000406762700088
Scopus: 2-s2.0-85020292566
Институција/група
IHTMTY - JOUR AU - Vujković, Milica AU - Matovic, Ljiljana AU - Krstić, Jugoslav AU - Stojmenović, Marija AU - Dukić, Andelka AU - Babić, Biljana M. AU - Mentus, Slavko PY - 2017 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/2135 AB - The activated carbon cloth (ACC), obtained by chemical/physical activation of carbonized rayon fibers, was grinded in a ball mill and studied from the aspect of double layer capacitance. The changes in pore structure, morphology and acid/basic properties caused by ball milling were studied by means of N-2 adsorption/desorption, Fourier-transformed infrared spectrometry, Boehm's titration and Scanning Electron Microscopy. Both potentiodynamic and galvanostatic cycling were used to evaluate the double layer capacitance in three alkaline, acidic and neutral aqueous solutions (KOH, H2SO4 and Na2SO4). While double layer capacitance of original ACC was found to be negligible, ball milled material (ACCm) displayed capacitance in the range of supercapacitors. In order to explain this huge capacitance improvement, we found that ball milling substantially increased the concentration of lactone, phenolic and quinone groups on the surface. We suggest that these groups, through improved hydrophilicity, enable faster ion diffusion into carbon micropores. The energy density stored by double layer was highest in neutral sodium sulphate solution. Namely, operational voltage of similar to 2 V and double layer capacitance of 220 F g(-1) at 1A g(-1), enable the energy density of ACCm/Na2SO4/ACCm capacitor of 31.7 Wh kg(-1) at 2000 W kg(-1), much higher than that of commercial EDLC carbon capacitors. According to the here presented literature survey in a tabular form, the energy density of the studied sample is also higher from that of numerous thus far published aqueous carbon capacitors. PB - Oxford : Pergamon-Elsevier Science Ltd T2 - Electrochimica Acta T1 - Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions VL - 245 SP - 796 EP - 806 DO - 10.1016/j.electacta.2017.06.018 ER -
@article{ author = "Vujković, Milica and Matovic, Ljiljana and Krstić, Jugoslav and Stojmenović, Marija and Dukić, Andelka and Babić, Biljana M. and Mentus, Slavko", year = "2017", abstract = "The activated carbon cloth (ACC), obtained by chemical/physical activation of carbonized rayon fibers, was grinded in a ball mill and studied from the aspect of double layer capacitance. The changes in pore structure, morphology and acid/basic properties caused by ball milling were studied by means of N-2 adsorption/desorption, Fourier-transformed infrared spectrometry, Boehm's titration and Scanning Electron Microscopy. Both potentiodynamic and galvanostatic cycling were used to evaluate the double layer capacitance in three alkaline, acidic and neutral aqueous solutions (KOH, H2SO4 and Na2SO4). While double layer capacitance of original ACC was found to be negligible, ball milled material (ACCm) displayed capacitance in the range of supercapacitors. In order to explain this huge capacitance improvement, we found that ball milling substantially increased the concentration of lactone, phenolic and quinone groups on the surface. We suggest that these groups, through improved hydrophilicity, enable faster ion diffusion into carbon micropores. The energy density stored by double layer was highest in neutral sodium sulphate solution. Namely, operational voltage of similar to 2 V and double layer capacitance of 220 F g(-1) at 1A g(-1), enable the energy density of ACCm/Na2SO4/ACCm capacitor of 31.7 Wh kg(-1) at 2000 W kg(-1), much higher than that of commercial EDLC carbon capacitors. According to the here presented literature survey in a tabular form, the energy density of the studied sample is also higher from that of numerous thus far published aqueous carbon capacitors.", publisher = "Oxford : Pergamon-Elsevier Science Ltd", journal = "Electrochimica Acta", title = "Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions", volume = "245", pages = "796-806", doi = "10.1016/j.electacta.2017.06.018" }
Vujković, M., Matovic, L., Krstić, J., Stojmenović, M., Dukić, A., Babić, B. M.,& Mentus, S.. (2017). Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions. in Electrochimica Acta Oxford : Pergamon-Elsevier Science Ltd., 245, 796-806. https://doi.org/10.1016/j.electacta.2017.06.018
Vujković M, Matovic L, Krstić J, Stojmenović M, Dukić A, Babić BM, Mentus S. Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions. in Electrochimica Acta. 2017;245:796-806. doi:10.1016/j.electacta.2017.06.018 .
Vujković, Milica, Matovic, Ljiljana, Krstić, Jugoslav, Stojmenović, Marija, Dukić, Andelka, Babić, Biljana M., Mentus, Slavko, "Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions" in Electrochimica Acta, 245 (2017):796-806, https://doi.org/10.1016/j.electacta.2017.06.018 . .