Synthesis, Characterization and Electrochemical Study of Graphene Oxide-Multi Walled Carbon Nanotube-Manganese Oxide-Polyaniline Electrode as Supercapacitor

Hosseini, Mir Ghasem; Shahryari, Elham

doi:10.1016/j.jmst.2016.05.008

Cited by 54 publications

(33 citation statements)

References 39 publications

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“…Additionally, the stabilized PAN fibers revealed a higher cyclization temperature than the bulk PAN polymer, suggesting that more thermal energy is needed for cyclization. The chemical processes involved during carbonization are cyclization, dehydrogenation, aromatization, oxidation and crosslinking that generally causes the formation of ladder like structure [16]. During stabilization, PAN molecules absorb oxygen from air and experience chemical changes thereby resulting in the formation of ladder-like structure that no longer melted and therefore retain fiber morphology in the carbonization process [15].…”

Section: Resultsmentioning

confidence: 99%

“…D-band describe lattice defects, stacking faults and hybridization, whereas, the G-band describes sp2 hybridization of carbon [20]. As can be seen in Fig 7, showed a peak at 1,500 cm -1 (D-peak) characterized the disorderly materials structure of PAN [16]. The G and D peaks increase as the carbonization temperature increases, indicating that the higher carbonization temperature facilitates the arrangement of carbon from a disorderly to an orderly state [21].…”

Section: Resultsmentioning

confidence: 99%

“…Therefore, the black samples show the steady line behavior with no peaks for carbonized PAN nanofiber composite samples. There is an apparent sharp peak, corresponding to (002) plans for carbonized PAN [16]. …”

Section: Resultsmentioning

confidence: 99%

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Synthesis of electrospun polyacrylonitrile- derived carbon fibers and comparison of properties with bulk form

2018

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This study deals with the fabrication of polyacrylonitrile (PAN) nanofibers via an electrospinning process followed by stabilizing and carbonization in order to remove all non-carboneous matter and ensure a pure carboneous material. The as-spun PAN fibers were stabilized in air at 270°C for one hour and then carbonized at 750, 850, and 950°C in an inert atmosphere (argon) for another one hour. Differential scanning calorimetry and Raman spectroscopy were employed to determine the thermal and chemical properties of PAN. Surface features and morphologies of PAN-derived carbon nanofibers were investigated by means of scanning electron microscopy (SEM). SEM micrograms showed that fiber diameters were reduced after carbonization due to evolution of toxic gases and dehydrogenation. The Raman spectra of carbonized fibers manifested D/G peaks. The Raman spectroscopy peaks of 1100 and 500 cm-1 manifested the formation of γ phase and another peak at 900 cm-1 manifested the formation of α-phase. The water contact angle measurement of carbonized PAN fibers indicated that the nanofibers were superhydrophobic (θ > 150o) due to the formation of bumpy and pitted surface after carbonization. In DSC experiment, the stabilized fibers showed a broad exothermic peak at 308°C due to cyclization process. The mechanical andThermal analysis was used to ascertain mechanical properties of carbonized PAN fibers. PAN-derived carbon nanofibers possess excellent physica and mechanical properties and therefore, they may be suitable for many industrial applications such as energy, biomedical, and aerospace.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Synthesis of electrospun polyacrylonitrile- derived carbon fibers and comparison of properties with bulk form

2018

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“…Besides, they are favorable candidates for the reinforcement of polymer matrices. [19][20][21] In the open literature, considerable research papers have previously elucidated the positive impacts of different forms of individual CNT or graphene on pure epoxy resins. 20,22 The signicant effect of mixing CNT and graphene as a mixed reinforcement agent into PANI as a polymer matrix has been recently reported.…”

Section: Introductionmentioning

confidence: 99%

“…20,22 The signicant effect of mixing CNT and graphene as a mixed reinforcement agent into PANI as a polymer matrix has been recently reported. 21 In addition, no studies have reported epoxy resin-reinforced mixed CNT and graphene. Therefore, as a continuation of our previous study, 23 the present manuscript is directed to fabricate a new category of epoxy resin composite materials reinforced by mixed graphene nano-platelet/carbon nanotube.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of EPYR/GNP/MWCNT carbon-based composite materials for promoted epoxy coating performance

2018

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The present study is aimed to fabricate composite materials containing epoxy resin (EPYR) reinforced by mixed carbon-based nano-fillers in the form of graphene nano-platelet (GNP) and multi-walled carbon nanotube (MWCNT) using the dissolution casting technique with the help of ultrasonic assistance. The pure epoxy resin was reinforced by variable loading of mixed GNP/MWCNT in situ, and the epoxy resin is denoted as EPYR/GNP/MWCNT 2-30 . The numbers 2-30 corresponded to the final mass ratio of the nano-fillers. The designed products were reinforced by variable percentages of GNP/MWCNTs. XRD, FT-IR, thermal analyses, FE-SEM, TEM and electrical conductivity were utilized as identification techniques to confirm the structures of these composite materials. An excellent evidence for the composite formation was given by XRD diffraction patterns and FT-IR spectroscopy. The introduced amounts of mixed nano-fillers showed significant effects on the thermal, conducting and coating behaviors of pure EPYR. Pure EPYR and EPYR/GNP/MWCNT 20,30 showed higher thermal stabilities than other materials in the range of 400-410 C. EPYR/GNP/MWCNT 20 also showed remarkable increase in the thermal stability compared to other materials. T 10 represents the temperatures at which 10% weight losses are examined.Pure EPYR and its related EPYR/GNP/MWCNT 2-30 displayed similar thermal stabilities at T 10 temperature (330 AE 4 C). The morphological features were examined by SEM and TEM; these features showed that the nanocomposite components were extremely compatible. The in situ electrical conductivity values showed noticeable enhancement for the formulations of EPYR/GNP/MWCNT 2-10 . Moreover, the coating performance of EPYR was tested by water uptake experiments and electrochemical impedance; both tests proved that the mixed GNP/MWCNT nano-fillers remarkably improved the pure EPYR coating due to the ionic charge transfer resistance and elevated barrier behaviour. The coating resistance variations values (CRv) of EPYR/GNP/MWCNT 10 were the highest among the measured composition values, closely followed by those of EPYR/GNP/MWCNT 20 and EPYR/GNP/MWCNT 30 .

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Metal Oxides for Supercapacitors

Adli

Hosseini

et al. 2021

Handbook of Supercapacitor Materials

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Synthesis, Characterization and Electrochemical Study of Graphene Oxide-Multi Walled Carbon Nanotube-Manganese Oxide-Polyaniline Electrode as Supercapacitor

Cited by 54 publications

References 39 publications

Synthesis of electrospun polyacrylonitrile- derived carbon fibers and comparison of properties with bulk form

Synthesis of electrospun polyacrylonitrile- derived carbon fibers and comparison of properties with bulk form

Fabrication of EPYR/GNP/MWCNT carbon-based composite materials for promoted epoxy coating performance

Metal Oxides for Supercapacitors

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