Photoresponse and electrochemical behaviour of azobenzene anchored graphene oxide for energy storage application

Baby, Anjana; Abinaya, S.; John, Athira Maria; Sreeja, P B

doi:10.1016/j.matchemphys.2023.127592

Cited by 7 publications

(2 citation statements)

References 40 publications

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“…Carbon nanomaterials exhibit long cycling life, but their specific capacitance is very low. On the other hand, ECPs are excellent candidates that possess high specific capacitance, but their stability is very poor. – …”

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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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%

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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“…Azobenzene (AB) and its derivatives have been researched for almost a century for their reversible photoinduced trans-cis isomerization and their potential use as photoresponsive materials. [1][2][3][4][5][6] The trans isomer of azobenzene converts to cis isomer under the influence of light, making it suitable for use as a molecular switch. [7,8] Azobenzenes (ABs) are easily synthesized and are highly versatile photoswitches.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Investigation of 3‐[(2‐chlorophenyl)diazenyl]pyridine‐2,6‐diamine as Optical Limiter

John,

Benny,

Philip

et al. 2023

ChemistrySelect

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Azobenzenes undergo reversible trans‐cis photoisomerization and have been extensively studied as photoresponsive material. In contrast, azopyridines have garnered relatively less attention despite their similar photochemistry. When compared to azobenzene, azopyridines offer more opportunities for material design through hydrogen bonding and coordination chemistry. Here, we report the isomerization for 3‐[(2‐chlorophenyl)diazenyl]pyridine‐2,6‐diamine (1od) through an integrative experimental and computational study. Notably, the energy barrier of 1od was significantly lower than that of previously reported azobenzenes. Moreover, we investigated and elucidated the photoisomerization pathway. 1od exhibited high nonlinear absorption, with a nonlinear absorption coefficient (βeff) of 1.31 10−9 m W−1, as determined by Z‐scan measurements. The results indicate that 1od has potential applications in optical limiters, which are used to fabricate protective eyewear and safeguard optical sensors from damage.

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Thermal stability improvement of azobenzene for the integration of photochemical and solar thermochemical energy conversion

Guo,

Zhang,

Xiong

et al. 2023

Case Studies in Thermal Engineering

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Photoresponse and electrochemical behaviour of azobenzene anchored graphene oxide for energy storage application

Cited by 7 publications

References 40 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

Experimental and Theoretical Investigation of 3‐[(2‐chlorophenyl)diazenyl]pyridine‐2,6‐diamine as Optical Limiter

Thermal stability improvement of azobenzene for the integration of photochemical and solar thermochemical energy conversion

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