Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions
Само за регистроване кориснике
2017
Аутори
Vujković, MilicaMatović, Ljiljana
Krstić, Jugoslav B.
Stojmenović, Marija
Đukić, Anđelka B.
Babić, Biljana M.
Mentus, Slavko V.
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, Boehms 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 hydrophilici...ty, 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. (C) 2017 Elsevier Ltd. All rights reserved.
Кључне речи:
carbon supercapacitor / mechanochemical activation / Na2SO4 aqueous electrolyte / high energyИзвор:
Electrochimica Acta, 2017, 245, 796-806Финансирање / пројекти:
- Синтеза, процесирање и карактеризација наноструктурних материјала за примену у области енергије, механичког инжењерства, заштите животне стредине и биомедицине (RS-45012)
- Литијум-јон батерије и горивне ћелије-истраживање и развој (RS-45014)
- Serbian Academy of Sciences and Arts Electrocatalysis in the contemporary processes of energy conversion, NATO through the Science for Peace Project [EAP. SFPP 984925-DURAPEM]
DOI: 10.1016/j.electacta.2017.06.018
ISSN: 0013-4686; 1873-3859
WoS: 000406762700088
Scopus: 2-s2.0-85020292566
Колекције
Институција/група
VinčaTY - JOUR AU - Vujković, Milica AU - Matović, Ljiljana AU - Krstić, Jugoslav B. AU - Stojmenović, Marija AU - Đukić, Anđelka B. AU - Babić, Biljana M. AU - Mentus, Slavko V. PY - 2017 UR - https://vinar.vin.bg.ac.rs/handle/123456789/1661 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, Boehms 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. (C) 2017 Elsevier Ltd. All rights reserved. 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 Matović, Ljiljana and Krstić, Jugoslav B. and Stojmenović, Marija and Đukić, Anđelka B. and Babić, Biljana M. and Mentus, Slavko V.", 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, Boehms 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. (C) 2017 Elsevier Ltd. All rights reserved.", 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., Matović, L., Krstić, J. B., Stojmenović, M., Đukić, A. B., Babić, B. M.,& Mentus, S. V.. (2017). Mechanically activated carbonized rayon fibers as an electrochemical supercapacitor in aqueous solutions. in Electrochimica Acta, 245, 796-806. https://doi.org/10.1016/j.electacta.2017.06.018
Vujković M, Matović L, Krstić JB, Stojmenović M, Đukić AB, Babić BM, Mentus SV. 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, Matović, Ljiljana, Krstić, Jugoslav B., Stojmenović, Marija, Đukić, Anđelka B., Babić, Biljana M., Mentus, Slavko V., "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 . .