‘Pillar effect’ of chemically bonded fullerene in enhancing supercapacitance performances of partially reduced fullerenol graphene oxide hybrid electrode material

Jaiswal, Rimpa; Saha, Uttam Kumar; Goswami, Thako Hari; Srivastava, Anurag; Prasad, N. Eswara

doi:10.1016/j.electacta.2018.06.110

Cited by 25 publications

(52 citation statements)

References 51 publications

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“…Figure 4b depicts the Bode phase plots of the different samples, in which phase angel 0° represents pure resistor, and phase angle 90° represents ideal capacitor. [ 52 ] The phase values of the PAAC (79.6°), FPAC (76.0°), PSAC (73.3°) and PA 3 FP 1 AC (74.9°), PA 3 FP 1 PS 2 AC (77.1°) samples at the low frequency of 0.01 Hz are relatively close to that of ideal capacitors, which indicates most of double layer charge storage contribution with some pseudo capacitance contribution for the materials. [ 53 ] Here the PSAC sample demonstrates the smallest phase value, which is in agreement with its higher N and O content, and the pseudo‐capacitance peaks in the CV data.…”

Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Porous Carbon from Mixed Leaves for High‐Performance Supercapacitors

Yang

Chen

et al. 2020

Chin. J. Chem.

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Main observation and conclusion With the increasing demand of sustainable and eco‐friendly resources, it is very attractive to use waste leaves for activated carbon (AC) preparation that can be used in supercapacitors. Considering the practically collected leaves are commonly in mixed nature, and extra efforts are needed to sort these mixtures, we here report the first preparation of AC using mixed leaves from different plants, including Platanus acerifolia (PA), Firmiana platanifolia (FP) and Pistia stratiotes (PS), and compared the results with single leaves‐derived AC materials. These leave‐derived AC samples were characterized with FESEM, EDS, FTIR and Raman spectroscopy, and electrochemical tests. The AC derived from mixed leaves (PA3FP1PS2AC) showed a good specific capacitance of 246 F·g−1 at 1 A·g−1 in aqueous 3 mol·L–1 KOH. This sample further showed the largest specific capacitance of 201 F·g−1 at 5 A·g−1, as compared with the non‐mixed AC samples, and a good stability of 100.0% capacitance retention over 1000 cycles. Utilizing mixed leaves for AC preparation is not only demonstrated to be a promising approach of low cost and high‐performance AC production for supercapacitor applications, but may also help environmental protection by reducing the invasive species problem.

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Section: Resultsmentioning

confidence: 99%

Preparation and Characterization of Porous Carbon from Mixed Leaves for High‐Performance Supercapacitors

Yang

Chen

et al. 2020

Chin. J. Chem.

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“…The synergistic effect of both components was reported by Hahn for graphene sheets separated by AuNPs covered with C 60 fullerene derivative PC60BM [19]. Correspondingly, graphene-fullerene composite nanomaterials were successfully employed in construction of energy storage materials, where buckyballs served as spacers between graphene monolayers [20] and enhanced surface area [21]. A similar route was also presented Zhang et al, where a fullerene derivative covalently bound to the surface of graphite oxide facilitated its exfoliation to single graphene sheets and prevented its later re-stacking [22].…”

Section: Introductionmentioning

confidence: 88%

Functionalization of Graphene by π–π Stacking with C60/C70/Sc3N@C80 Fullerene Derivatives for Supercapacitor Electrode Materials

Piotrowski

Fedorczyk

Grebowski

et al. 2022

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Non-covalent modification of graphene is one of the strategies used for enhancing its energy storage properties. Herein, we report the design and synthesis of a series of fullerene derivatives that are capable of assembly on graphene sheets by π–π stacking interactions. Newly synthesized graphene-fullerene hybrid nanomaterials were characterized using spectroscopic and microscopic techniques. In order to determine the specific capacitance of obtained electrode materials galvanostatic charge-discharge measurements were performed. The obtained results allowed the determination of which fullerene core and type of substituent introduced on its surface can increase the capacitance of resulting electrode. Benefiting from introduced fullerene derivative molecules, graphene with naphthalene functionalized C70 fullerene showed specific capacitance enhanced by as much as 15% compared to the starting material.

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“…All the CNOs deviated from the ideal value of 90 • at low frequencies, indicating the faradaic contributions to the charge storage mechanism [13]. In this regard, the electron density of the aromatic rings could lead to greater faradaic contributions and, consequently, a larger deviation in φ (73.2 • vs. 90 • ) [69,70]. The Bode plot of the impedance vs. frequency (Figure 11c) also shows that the pyr-CNOs possessed a lower impedance than the ox-CNOs, including that the functionalization process that was performed with the pyrene groups could restore the intrinsic properties of the nanomaterial, despite the previous oxidation process.…”

Section: Sample Specific Capacitance (Equation (2)) (F/g) Specific Camentioning

confidence: 94%

Evaluation of the Covalent Functionalization of Carbon Nano-Onions with Pyrene Moieties for Supercapacitor Applications

et al. 2020

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Herein, we report the surface functionalization of carbon nano-onions (CNOs) through an amidation reaction that occurs between the oxidized CNOs and 4-(pyren-4-yl)butanehydrazide. Raman and Fourier transform infrared spectroscopy methods were used to confirm the covalent functionalization. The percentage or number of groups in the outer shell was estimated with thermal gravimetric analysis. Finally, the potential applications of the functionalized CNOs as electrode materials in supercapacitors were evaluated by cyclic voltammetry and electrochemical impedance spectroscopy. Functionalization increased the specific capacitance by approximately 138% in comparison to that of the pristine CNOs, while acid-mediated oxidation reduced the specific capacitance of the nanomaterial by 24%.

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‘Pillar effect’ of chemically bonded fullerene in enhancing supercapacitance performances of partially reduced fullerenol graphene oxide hybrid electrode material

Cited by 25 publications

References 51 publications

Preparation and Characterization of Porous Carbon from Mixed Leaves for High‐Performance Supercapacitors

Preparation and Characterization of Porous Carbon from Mixed Leaves for High‐Performance Supercapacitors

Functionalization of Graphene by π–π Stacking with C60/C70/Sc3N@C80 Fullerene Derivatives for Supercapacitor Electrode Materials

Evaluation of the Covalent Functionalization of Carbon Nano-Onions with Pyrene Moieties for Supercapacitor Applications

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