Longitudinal unzipping of carbon nanotubes and their electrochemical performance in supercapacitors

Saghafi, M.; Mahboubi, F.; Mohajerzadeh, S.; Fathi, Mohammad; Holze, Rudolf

doi:10.1016/j.cap.2014.07.012

Cited by 19 publications

(18 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The capacitance value obtained has been multiplied by 4 to evaluate the specic capacitance of the single electrode. 28 Fig. The observed increase in the specic capacitance may be due to the partial unzipping of MWCNTs, which increases the specic surface area of UZ-MWCNTs.…”

Section: Electrochemical Studiesmentioning

confidence: 99%

“…[25][26][27][28][29][30][31][32][33][34][35] A majority of the studies reported for unzipped MWCNTs (UZ-MWCNTs) based supercapacitors have utilized aqueous electrolytes. [25][26][27][28][29][30][31][32][33][34][35] A majority of the studies reported for unzipped MWCNTs (UZ-MWCNTs) based supercapacitors have utilized aqueous electrolytes.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, unzipping of the MWCNTs to yield ribbon of graphene sheets both by chemical methods and electrochemical methods has been reported. [25][26][27][28][29][30][31][32][33][34][35] A majority of the studies reported for unzipped MWCNTs (UZ-MWCNTs) based supercapacitors have utilized aqueous electrolytes. [26][27][28][29][30][31][32] Even though MWCNTs based supercapacitors utilizing aqueous electrolytes exhibit high power density due to the high electronic conductivity and readily accessible surface area.…”

Section: Introductionmentioning

confidence: 99%

“…[25][26][27][28][29][30][31][32][33][34][35] A majority of the studies reported for unzipped MWCNTs (UZ-MWCNTs) based supercapacitors have utilized aqueous electrolytes. [26][27][28][29][30][31][32] Even though MWCNTs based supercapacitors utilizing aqueous electrolytes exhibit high power density due to the high electronic conductivity and readily accessible surface area. However, the energy density is a concern for these supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A supercapacitor based on longitudinal unzipping of multi-walled carbon nanotubes for high temperature application

et al. 2015

View full text Add to dashboard Cite

Multi-walled carbon nanotubes (MWCNTs) were partially unzipped longitudinally by a chemical method.Unzipped multi-walled carbon nanotubes (UZ-MWCNTs) were characterized by transmission electron microscopic analysis, X-ray diffraction and Raman spectroscopic analyses. UZ-MWCNTs were utilized for electrode preparation and the electrodes were used in the fabrication of a supercapacitor. At room temperature, the UZ-MWCNTs based supercapacitor showed a specific capacitance of $41 F g À1 , whilepristine MWCNTs based supercapacitor exhibited 22 F g À1 at the scan rate of 25 mV s À1 . The increase in specific capacitance was attributed to an increase in effective specific surface area of UZ-MWCNTs due to partial unzipping. UZ-MWCNTs based supercapacitor exhibited an increase in specific capacitance with increase in temperature. It showed a specific capacitance of $74 F g À1 at 100 C at the scan rate of 25 mV s À1 , while the pristine MWCNTs based supercapacitor did not show any appreciable change in specific capacitance as a function of temperature. UZ-MWCNTs exhibited three-fold increase in specific capacitance as compared to pristine MWCNTs at 100 C. Impedance spectroscopic analysis of the supercapacitors revealed that the UZ-MWCNTs based supercapacitor exhibited higher internal resistance and lower leakage resistance than pristine MWCNTs based supercapacitor. Continuous 'chargedischarge' cycling behaviour indicated that the UZ-MWCNTs based supercapacitor exhibited less stability during initial cycles even though it depicted higher specific capacitance as compared to the pristine MWCNTs based supercapacitor.

show abstract

Section: Electrochemical Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…[25][26][27][28][29][30][31][32][33][34][35] A majority of the studies reported for unzipped MWCNTs (UZ-MWCNTs) based supercapacitors have utilized aqueous electrolytes. [26][27][28][29][30][31][32] Even though MWCNTs based supercapacitors utilizing aqueous electrolytes exhibit high power density due to the high electronic conductivity and readily accessible surface area. However, the energy density is a concern for these supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A supercapacitor based on longitudinal unzipping of multi-walled carbon nanotubes for high temperature application

et al. 2015

View full text Add to dashboard Cite

show abstract

“…Kosynkin et al [217] synthesized oxidized graphene nanoribbons (GNRs) from MWCNTs through chemical treatment, which is known as the longitudinal unzipping process. This material was then thermally reduced in H 2 to form usable GNRs, promising electrode materials for supercapacitors [218]. While the same technique can theoretically be applied to single-walled CNTs, the assynthesized GNRs were prone to entanglement, after which the separation of individual GNRs was a challenge.…”

Section: Advanced Starting Materials 351 Cntsmentioning

confidence: 99%

Synthesis of graphene: Potential carbon precursors and approaches

Yan

Nashath

Chen

et al. 2020

Nanotechnology Reviews

104

View full text Add to dashboard Cite

Graphene is an advanced carbon functional material with inherent unique properties that make it suitable for a wide range of applications. It can be synthesized through either the top–down approach involving delamination of graphitic materials or the bottom–up approach involving graphene assembly from smaller building units. Common top–down approaches are exfoliation and reduction while bottom–up approaches include chemical vapour deposition, epitaxial growth, and pyrolysis. A range of materials have been successfully used as precursors in various synthesis methods to derive graphene. This review analyses and discusses the suitability of conventional, plant- and animal-derived, chemical, and fossil precursors for graphene synthesis. Together with its associated technical feasibility and economic and environmental impacts, the quality of resultant graphene is critically assessed and discussed. After evaluating the parameters mentioned above, the most appropriate synthesis method for each precursor is identified. While graphite is currently the most common precursor for graphene synthesis, several other precursors have the potential to synthesize graphene of comparable, if not better, quality and yield. Thus, this review provides an overview and insights into identifying the potential of various carbon precursors for large-scale and commercial production of fit-for-purpose graphene for specific applications.

show abstract

Na Adsorption on Para Boron-Doped AGNR for Sodium-Ion Batteries (SIBs): A First Principles Analysis

Kumar

Singh

2022

J. Electron. Mater.

View full text Add to dashboard Cite

Longitudinal unzipping of carbon nanotubes and their electrochemical performance in supercapacitors

Cited by 19 publications

References 46 publications

A supercapacitor based on longitudinal unzipping of multi-walled carbon nanotubes for high temperature application

A supercapacitor based on longitudinal unzipping of multi-walled carbon nanotubes for high temperature application

Synthesis of graphene: Potential carbon precursors and approaches

Na Adsorption on Para Boron-Doped AGNR for Sodium-Ion Batteries (SIBs): A First Principles Analysis

Contact Info

Product

Resources

About