Supercapacitor Electrode. Formation Based on Thoil-Functionalized Graphene Oxide

Emadi, Asghar; Honarvar, Bizhan; Emadi, Masoomeh; Nafar, Mehdi

doi:10.1134/s107042722008008x

Cited by 3 publications

(4 citation statements)

References 32 publications

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“…Second, a Faradic process involving the surface functional groups results in a contribution to pseudocapacitance . For instance, Emadi et al have prepared thiol group-functionalized GO as a supercapacitor electrode material . The introduction of the thiol group imparted pseudocapacitive behavior to the supercapacitor electrode.…”

Section: Introductionmentioning

confidence: 99%

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Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Baby,

Sunny,

Vigneshwaran

et al. 2023

ACS Appl. Energy Mater.

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Electronically conducting polymers (ECPs)/carbon nanomaterialbased polyaniline electrodes have received great interest in the field of supercapacitors due to their high specific capacitance, good electronic conductivity, good mechanical strength, good chemical and electrochemical stabilities, etc. Among the various available ECPs, they have received much importance due to their excellent electrochemical performances. Herein, we report a facile synthesis of a PANI-grafted graphene oxide (GO)-azopyridine (Azo) (PANI/GO-Azo) nanocomposite and use it as electrodes for fabricating supercapacitors. The azo units present in the nanocomposite act as a spacer between PANI and GO. The interfacial polymerization method is adopted for the synthesis of PANI/GO-Azo nanocomposites. The PANI/ GO-Azo nanocomposite electrode exhibits a gravimetric capacitance of 426 F g −1 at a current density of 0.25 A g −1 in 1 M H 2 SO 4 (aqueous) electrolyte. The electrode possesses good cycling stability of more than 5000 cycles with a Coulombic efficiency of 98.5%. An asymmetric supercapacitor fabricated with PANI/GO-Azo as the positive electrode and activated carbon as the negative electrode delivers an energy density of 12.45 W h kg −1 with a power density of 274.9 W kg −1 . This study proclaims that the PANI/GO-Azo nanocomposite electrode is highly promising for next-generation supercapacitors.

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Section: Introductionmentioning

confidence: 99%

“…31 For instance, Emadi et al have prepared thiol group-functionalized GO as a supercapacitor electrode material. 32 The introduction of the thiol group imparted pseudocapacitive behavior to the supercapacitor electrode.…”

Section: Introductionmentioning

confidence: 99%

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Baby,

Sunny,

Vigneshwaran

et al. 2023

ACS Appl. Energy Mater.

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“…This lightweight and flexible material may exhibit much lower values of specific capacitance due to irreversible restacking and agglomeration upon preparation processes as a result of graphene interlayer van der Waals forces. Consequently, the active surface area accessible to electrolyte ions is significantly reduced [10] . Functionalization of graphene with small biocompatible organic molecules that can act as spacer materials prevents the aggregation of graphene sheets, facilitating ion transfer.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, the active surface area accessible to electrolyte ions is significantly reduced. [10] Functionalization of graphene with small biocompatible organic molecules that can act as spacer materials prevents the aggregation of graphene sheets, facilitating ion transfer. Furthermore, bio‐organic functionalities are renewable, typically low cost, allow rational design synthesis, and generate minimum waste.…”

Section: Introductionmentioning

confidence: 99%

Graphene with Covalently Grafted Amino Acid as a Route Toward Eco‐Friendly and Sustainable Supercapacitors

et al. 2021

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Eco‐friendly, electrochemically active electrode materials based on covalent graphene derivatives offer enormous potential for energy storage applications. However, covalent grafting of functional groups onto the graphene surface is challenging due to its low reactivity. Here, fluorographene chemistry was employed to graft an arginine moiety via its guanidine group homogeneously on both sides of graphene. By tuning the reaction conditions and adding a non‐toxic pore‐forming agent, an optimum degree of functionalization and hierarchical porosity was achieved in the material. This tripled the specific surface area and yielded a high capacitance value of approximately 390 F g−1 at a current density of 0.25 A g−1. The applicability of the electrode material was investigated under typical operating conditions by testing an assembled supercapacitor device for up to 30000 charging/discharging cycles, revealing capacitance retention of 82.3 %. This work enables the preparation of graphene derivatives with covalently grafted amino acids for technologically important applications, such as supercapacitor‐based energy storage.

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Graphene oxide bifunctionalized with NH2/NH3+ and their outstanding-performance against corrosion

Ramírez-Soria

León-Silva

Lara-Ceniceros

et al. 2021

Applied Surface Science

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Supercapacitor Electrode. Formation Based on Thoil-Functionalized Graphene Oxide

Cited by 3 publications

References 32 publications

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Azopyridine as a Linker Molecule in Polyaniline-Grafted Graphene Oxide Nanocomposite Electrodes for Asymmetric Supercapacitors

Graphene with Covalently Grafted Amino Acid as a Route Toward Eco‐Friendly and Sustainable Supercapacitors

Graphene oxide bifunctionalized with NH2/NH3+ and their outstanding-performance against corrosion

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