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dc.contributor.authorAbeykoon, Nimali C.en_US
dc.contributor.authorGarcia, Veliaen_US
dc.contributor.authorJayawickramage, Rangana A.en_US
dc.contributor.authorPerera, Wijayanthaen_US
dc.contributor.authorCure, Jeremyen_US
dc.contributor.authorChabal, Yves J.en_US
dc.contributor.authorBalkus, Kenneth J.en_US
dc.contributor.authorFerraris, John P.en_US
dc.description.abstractCarbon nanofibers with high surface area have become promising electrode materials for supercapacitors because of their importance in increasing energy density. In this study, a high free volume polymer, 6FDA-DAM:DABA (6FDD) was blended with polybenzimidazole (PBI) in different ratios to obtain different compositions of PBI/6FDD immiscible polymer blends. Freestanding nanofiber mats were obtained via electrospinning using blend precursors dissolved in N,N-dimethylacetamide (DMAc). Subsequently, carbonization, followed by CO₂ activation at 1000 °C was applied to convert the fiber mats into porous carbon nanofibers (CNFs). The addition of 6FDD shows significant effects on the microstructure and enhancement of the surface area of the CNFs. The obtained CNFs show specific surface area as high as 3010 m² g⁻¹ with pore sizes comparable to those of the electrolyte ions (PYR₁₄TFSI). This provides good electrolyte accessibility to the pore of the carbon materials resulting in enhanced energy density compared to the CNFs obtained from pure PBI. Electrodes derived from PBI:6FDD (70 : 30) exhibited outstanding supercapacitor performance in coin cells with a specific capacitance of 142 F g⁻¹ at the scan rate of 10 mV s⁻¹ and energy density of 67.5 W h kg⁻¹ at 1 A g⁻¹ (58 W h kg⁻¹ at 10 A g⁻¹) thus demonstrating promising electrochemical performance for high performance energy storage system.en_US
dc.description.sponsorshipNational Science Foundation grants (IIP-1127564, CHE-1126177)en_US
dc.publisherRoyal Society of Chemistryen_US
dc.rightsCC BY-NC 3.0 (Attribution-NonCommercial)en_US
dc.rights©2017 The Royal Society of Chemistry. This article may not be further made available or distributed.en_US
dc.sourceRSC Advances
dc.subjectElectric capacityen_US
dc.subjectCarbon dioxideen_US
dc.subjectCarbon nanofibersen_US
dc.subjectInformation storage and retrieval systemsen_US
dc.subjectElectrochemical sensorsen_US
dc.subjectPorous materialsen_US
dc.subjectElectrochemical analysisen_US
dc.subjectEnergy storage--Equipment and suppliesen_US
dc.titleNovel Binder-Free Electrode Materials for Supercapacitors Utilizing High Surface Area Carbon Nanofibers Derived from Immiscible Polymer Blends of PBI/6FDA-DAM:DABAen_US
dc.description.departmentSchool of Natural Sciences and Mathematicsen_US
dc.identifier.bibliographicCitationAbeykoon, N. C., V. Garcia, R. A. Jayawickramage, W. Perera, et al. 2017. "Novel binder-free electrode materials for supercapacitors utilizing high surface area carbon nanofibers derived from immiscible polymer blends of PBI/6FDA-DAM:DABA." RSC Advances 7(34), doi:10.1039/C7RA01727Hen_US
dc.contributor.utdAuthorAbeykoon, Nimali C.en_US
dc.contributor.utdAuthorGarcia, Veliaen_US
dc.contributor.utdAuthorJayawickramage, Rangana A.en_US
dc.contributor.utdAuthorPerera, Wijayanthaen_US
dc.contributor.utdAuthorCure, Jeremyen_US
dc.contributor.utdAuthorChabal, Yves J.en_US
dc.contributor.utdAuthorBalkus, Kenneth J.en_US
dc.contributor.utdAuthorFerraris, John P.en_US
dc.contributor.ISNI0000 0000 4239 3958 (Chabal, YJ)en_US
dc.contributor.ORCID0000-0002-3225-0093 (Ferraris, JP)en_US

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CC BY-NC 3.0 (Attribution-NonCommercial)
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