Hierarchical Co3O4 decorated nitrogen-doped graphene oxide nanosheets for energy storage and gas sensing applications

Ramesh, Sivalingam; Karuppasamy, K.; Vikraman, Dhanasekaran; Kim, Eunhyun; Lama, Sanjeeb; Lee, Young-Jun; Kim, Do Kyung; Kim, Heung Soo

doi:10.1016/j.jiec.2021.06.007

Cited by 20 publications

(4 citation statements)

References 52 publications

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“…The peak at 15.1° corresponds to partial graphitic oxide formation of carbonized CNCs. The appearance of peak at 23.1° reveals the graphitic carbon formation from controlled carbonization of CNCs 37,39,40 …”

Section: Resultsmentioning

confidence: 99%

“…The appearance of peak at 23.1 reveals the graphitic carbon formation from controlled carbonization of CNCs. 37,39,40 The typical Raman spectral bands of Co 3 O 4 and Co 3 O 4 @CNC nanocomposites were clearly differentiated and presented in Figure 2b. The Co 3 O 4 spinel exhibits five active Raman bands at 186.5, 467.6, 512.3, 608.5, and 675.04 cm À1 , attributed to different phonon modes (F 2g , E g , and A 1g ).…”

Section: Characterizationmentioning

confidence: 99%

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Ball‐milling route to design hierarchical nanohybrid cobalt oxide structures with cellulose nanocrystals interface for supercapacitors

Palem

Shimoga

Rabani

et al. 2022

Intl J of Energy Research

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Summary Nanocellulose materials are promising sustainable and environmentally friendly candidates for green and renewable energy storage applications. Herein, hierarchical Co3O4@CNC nanohybrid structure was fabricated in conjunction with cobalt acetate tetrahydrate and cellulose nanocrystals (CNC) as a bio‐carbon source using green ball‐milling pathway for the first time. For comparison, pristine Co3O4 nanostructure was prepared using a similar method without adding CNC. The structural and morphological characteristics of nanohybrid composites were investigated using X‐ray diffractometer (XRD), Raman, X‐ray photoelectron spectroscopy (XPS), Fourier‐transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer‐Emmett‐Teller (BET) techniques. Furthermore, the electrochemical properties of the nanohybrid composites evaluated using cyclic voltammetry (CV), Galvanostatic Charge‐Discharge (GCD), and electrochemical impedance spectroscopy (EIS) techniques. The hierarchical Co3O4@CNC nanohybrid electrode showed the highest specific capacitance of 396 F/g that of pristine Co3O4 nanostructure electrode (was 268 F/g) at a current density of 1.0 A/g for a three‐electrode assembly. The hierarchical Co3O4@CNC nanohybrid electrode showed appreciable capacitive behavior with 96% cyclic retention even after 5,000 cycles at 1.0 A/g with energy density of 12.5 Wh k−1 at a power density of 230.5 W k−1. Thus, it is suitable for improving and/or designing active electrocatalysts for enhanced supercapacitor applications.

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Section: Resultsmentioning

confidence: 99%

Section: Characterizationmentioning

confidence: 99%

Ball‐milling route to design hierarchical nanohybrid cobalt oxide structures with cellulose nanocrystals interface for supercapacitors

Palem

Shimoga

Rabani

et al. 2022

Intl J of Energy Research

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“…79 The reactivity towards electromagnetic radiation, multiple valences, and the oxidation state of metal oxides make them more promising materials for catalytic reactions such as electrochemical redox reactions, isotopic exchange, photocatalysis, and various other applications currently under investigation by researchers. 80 Sivalingam et al 81 demonstrated that the Co 3 O 4 material possesses a redox activity characteristic that can be used for energy storage and sensing applications. The outstanding properties of metal oxides make them excellent candidates in several fields like electrochemical and bio-sensors, electrocatalysis, energy storage, optoelectronics, photoelectrochemical conversion, and surface-enhanced Raman spectroscopy.…”

Section: Metal Oxidesmentioning

confidence: 99%

Metal oxide-based electrochemical sensors for pesticide detection in water and food samples: a review

Maheshwaran,

Chen,

Lin

et al. 2024

Environ. Sci.: Adv.

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“…However, the graphene fibers ex hibit graphite-like structures because of the strong π-π bonding existing in graphen nanosheets, which results in a low specific surface area and a poor wettability of the elec trolyte [8,14,15]. The limited specific capacitance and poor energy density of the pure gra phene fibers restrict further application in future wearable/flexible electronics [16][17][18] Therefore, some materials with pseudocapacitive properties, for example, transition meta oxides [19][20][21][22], metal sulfides [14,[23][24][25], and conducting polymers [9,[26][27][28], have bee added into graphene fibers or other carbon materials to promote specific capacitance and energy density. Polyaniline is a potential candidate for the high theoretical specific pseu docapacitance and good electrical conductivity [29,30].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Polyaniline/Graphene Composite Fibers as Electrodes for Fiber-Shaped Supercapacitors

et al. 2021

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Graphene fiber-based supercapacitors are known as the potential energy resources for wearable/flexible electronics. However, increasing their specific capacitance and energy density remains a significant challenge. This paper indicates a double layer capacitance of the graphene nanosheets accompanied by pseudocapacitive behavior of the polyaniline to prepare composite fibers with high capacitive response. The polyaniline/graphene composite fibers (PANI/GFs) were synthesized by the self-assembled strategy and chemical reduction by HI. The wrinkle architecture of graphene nanosheets and uniform dispersion of the polyaniline are beneficial to increase the internal electroactive sites and provide a stable structure for the composite fibers. The constructed fiber-shaped supercapacitors with solid-state electrolyte deliver an excellent areal specific capacitance of 370.2 mF cm−2 and an outstanding areal energy density of 12.9 μW h cm−2. The current work reveals the attractive potential of the as-synthesized composite fibers for constructing fiber-shaped supercapacitors with distinguished electrochemical performance, which can be applied in future flexible electronics.

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Hierarchical Co3O4 decorated nitrogen-doped graphene oxide nanosheets for energy storage and gas sensing applications

Cited by 20 publications

References 52 publications

Ball‐milling route to design hierarchical nanohybrid cobalt oxide structures with cellulose nanocrystals interface for supercapacitors

Ball‐milling route to design hierarchical nanohybrid cobalt oxide structures with cellulose nanocrystals interface for supercapacitors

Metal oxide-based electrochemical sensors for pesticide detection in water and food samples: a review

Facile Fabrication of Polyaniline/Graphene Composite Fibers as Electrodes for Fiber-Shaped Supercapacitors

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