Graphene variants and heteroatom doped nanocomposites as electrode material for symmetric supercapacitors

Iyer, Maalavika S.; Ilangovan, R.

doi:10.1016/j.colcom.2021.100577

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…The usage of pristine rGO is reduced due to the possibility of agglomeration; carbon nanotubes (CNTs) are popular carbon variants that are known for their conductivity. A composite consisting of nitrogen-doped rGO and CNT (NrGO/CNT) has the ability to deliver better capacitance than pristine rGO as reported by our previous work …”

Section: Introductionmentioning

confidence: 64%

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Efficient Fabrication of Nanostructures Using a Combination of Bimetallic and Imidazolate Frameworks for Enhanced Supercapacitors and Electrochemical Sensing Applications

Iyer

Ilangovan

2023

ACS Appl. Energy Mater.

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A nanomatrix containing molybdate (MoO3) anchored on a zeolitic imidazolate framework (ZIF-8) supporting CoNi metal oxide framework (MOF) has been prepared. The synthesized nanocomposite possesses a high surface area of 333.66 m2 g–1, and it contains a mixture of meso- and macroporous structures. When implicating the nanostructure as an electrode material, the highest specific capacitance of 1260 F g–1 is obtained for the appropriate ratio of the MOF. The superior nanocomposite is deposited on carbon cloth and further tested as an electrode in a coin-cell-based (C2N1MZ||NGT) hybrid supercapacitor device, which exhibits a capacitance of 363 F g–1. The nanocomposite is further used as a transducer in electrochemical sensing of theophylline (TP). Square-wave voltammetry suggested that the nanomatrix exhibited creditable electrocatalytic activity and delivered a stable redox peak for different concentrations of TP ranging from 1 μM to 5 M. The limit of detection of the electrochemical sensor is calculated to be 75.4 nM, which suggests the practicality of the sensor. Therefore, the obtained results indicate that the prepared nanocomposite is suitable for energy and sensing applications.

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Section: Introductionmentioning

confidence: 64%

“…For the preparation of the NrGO/CNT nanocomposite, we followed a facile hydrothermal technique as reported in our previous study . The procedure is briefly discussed here.…”

Section: Methodsmentioning

confidence: 99%

Efficient Fabrication of Nanostructures Using a Combination of Bimetallic and Imidazolate Frameworks for Enhanced Supercapacitors and Electrochemical Sensing Applications

Iyer

Ilangovan

2023

ACS Appl. Energy Mater.

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“…Various methods have been explored to address this limitation, such as doping with heteroatoms or coating with conductive polymers [23][24][25]. However, these approaches often compromise the intrinsic properties of CNTs, including their mechanical strength and electrical conductivity [26].…”

Section: Introductionmentioning

confidence: 99%

“…While our group has previously used electrochemical activation to oxidize CNT yarns for supercapacitors [23,33] and actuators [17], the impact of EOT on CNT sheets remains unexplored. By employing EOT, our research not only addresses the critical limitation of low capacitance in pristine CNT sheets but also paves the way for their applicability to thin, flexible, high-performance supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Electrochemically Oxidized Carbon Nanotube Sheets for High-Performance and Flexible-Film Supercapacitors

Noh,

Choi,

Seo

et al. 2023

Nanomaterials

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The development of flexible, high-performance supercapacitors has been a focal point in energy storage research. While carbon nanotube (CNT) sheets offer promising mechanical and electrical properties, their low electrical double-layer capacitance significantly limits their practicability. Herein, we introduce a novel approach to address this challenge via the electrochemical oxidation treatment of CNT sheets stacked on a polyethylene terephthalate substrate. This introduces oxygen-containing functional groups onto the CNT surface, thereby dramatically enhancing the pseudocapacitive effect and improving ion adsorption. Consequently, using the material in a two-electrode system increased the capacitance by 54 times compared to pristine CNT. The results of electrochemical performance characterization, including cyclic voltammograms, galvanostatic charge/discharge curves, and capacitance retention testing data, confirm the efficacy of the electrochemical oxidation approach. Furthermore, the mechanical flexibility of the electrochemically wetted CNT sheets was validated through resistance and discharge retention testing under repetitive bending (98% capacitance retention after 1000 bending cycles). The results demonstrate that electrochemically wetted CNT sheets retain their intrinsic mechanical and electrical properties while significantly enhancing the electrochemical performance (0.59 mF/cm2 or 97.8 F/g). This work represents a significant advancement in the development of flexible, high-performance supercapacitors with potential applicability to wearable electronics, flexible displays, and next-generation energy storage solutions.

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Rational design of MXene/MWCNT/TOCNF film for flexible supercapacitor

Chen,

Feng,

Lian

et al. 2024

Ceramics International

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Graphene variants and heteroatom doped nanocomposites as electrode material for symmetric supercapacitors

Cited by 7 publications

References 28 publications

Efficient Fabrication of Nanostructures Using a Combination of Bimetallic and Imidazolate Frameworks for Enhanced Supercapacitors and Electrochemical Sensing Applications

Efficient Fabrication of Nanostructures Using a Combination of Bimetallic and Imidazolate Frameworks for Enhanced Supercapacitors and Electrochemical Sensing Applications

Electrochemically Oxidized Carbon Nanotube Sheets for High-Performance and Flexible-Film Supercapacitors

Rational design of MXene/MWCNT/TOCNF film for flexible supercapacitor

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