Use of redox additive to enhance the electrochemical performance of Co3O4/polyaniline/graphene composite-based supercapacitors

Haldar, Prasenjit

doi:10.1007/s10854-020-03329-3

Cited by 7 publications

(3 citation statements)

References 56 publications

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“…The Ragone plot exhibits considerably higher specific energy and power values for the Co–Co 3 O 4 electrodes with the 20Ac80Cl electrode obtaining superior specific energy of 77.4 Wh/kg and specific power of 180 W/kg at 1 A/g. The recorded specific energy and power values are comparable to those reported by Haldar (33.5 Wh/kg and 800 W/kg) on the Co 3 O 4 /PANI/Graphene electrode prepared by chemical precipitation . Similarly, specific energy and power values lower than our Co–Co 3 O 4 electrode have been previously recorded by other studies for Co 3 O 4 -based electrodes. − Additionally, the energy efficiency at different specific currents (Figure S4 of the Supporting Information) has been estimated from the GCD curves of the Co–Co 3 O 4 nanocomposite electrodes using the relation expressed in eq : η E = E D E C where E D and E C present the discharge and charge energies of the electrode, respectively .…”

Section: Resultssupporting

confidence: 87%

Effect of Molar Ratio Modulation of Cobalt Precursors on Supercapacitor Behavior of Engineered Co–Co₃O₄ Nanocomposite Electrodes

Nuamah

Noormohammed

Sarkar

2022

ACS Appl. Eng. Mater.

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Nanostructured Co−Co 3 O 4 composite thin films deposited on nickel foam (NF) using combined cyclic voltammetry (CV) and pulse reverse potential (CV PRP) modes of electrodeposition from an electrolyte composed of CoCl 2 and Co(CH 3 COO) 2 precursor salt solutions with varied molar ratios demonstrated a dependency of the supercapacitance performance over the precursor components' molar ratios. The specific capacity and its retention were found to increase with increasing CoCl 2 in the electrolyte with a starting value of 474.6 C/g (791 F/g) at an applied current load of 1 A/g for a molar ratio of Co(CH 3 COO) 2 :CoCl 2 of 100:0. High specific capacity of 1548 C/g (2580 F/g) and large retention (90.5%) were obtained at a critical molar ratio of Co(CH 3 COO) 2 :CoCl 2 of 20:80. However, with 100% CoCl 2 in the electrolyte, the specific capacity lowered to 276 C/g (460 F/g) with poor retention of only 60%. Crystallinity and morphological features, driven by the electrolyte concentration with molar variations of the deposited films, have been found to influence the specific capacitance performance. The degree of crystallinity, and the presence of Co and Co 3 O 4 phases for the different molar ratios have been revealed by X-ray diffraction (XRD) studies. The diverse morphological features obtained by scanning electron microscopy (SEM) and the varying quantities of Co and O in the Co−Co 3 O 4 nanocomposite thin films as confirmed by energy-dispersive X-ray spectroscopy (EDX) spectra correlate well with the electrochemical performance. The phase composition was further confirmed by the presence of Co−O bonds via the attenuated total reflection−Fourier transform infrared (ATR-FTIR) spectra obtained on these films.

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Section: Resultssupporting

confidence: 87%

Effect of Molar Ratio Modulation of Cobalt Precursors on Supercapacitor Behavior of Engineered Co–Co₃O₄ Nanocomposite Electrodes

Nuamah

Noormohammed

Sarkar

2022

ACS Appl. Eng. Mater.

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“…As a possible approach to further optimize the capacitive performances of the electrode materials, metal oxides or hydroxides were added as a third component into G/PANI composites [ 97 , 98 , 99 , 100 , 101 , 102 , 103 , 104 , 105 ]. A strong connection between metal oxide or hydroxide nanoparticles and 2D graphene resulted in unique structural features of composites and synergistic effect in the electrochemical properties derived from components of composite materials.…”

Section: Additives To Graphene/polyaniline Compositesmentioning

confidence: 99%

“…Similar to MnO 2 and Fe 3 O 4 , Co 3 O 4 was also used to enhance the electrochemical performance of G/PANI composite [ 101 , 102 , 103 ]. For example, Li et al mixed GO/PANI nanosheets with the metal salts as the precursors of metal oxide followed by hydrothermal treatment [ 101 ].…”

Section: Additives To Graphene/polyaniline Compositesmentioning

confidence: 99%

Synergetic Effect of Polyaniline and Graphene in Their Composite Supercapacitor Electrodes: Impact of Components and Parameters of Chemical Oxidative Polymerization

Okhay

Tkach

2022

Nanomaterials

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The current development of clean and high efficiency energy sources such as solar or wind energy sources has to be supported by the design and fabrication of energy storage systems. Electrochemical capacitors (or supercapacitors (SCs)) are promising devices for energy storage thanks to their highly efficient power management and possible small size. However, in comparison to commercial batteries, SCs do not have very high energy densities that significantly limit their applications. The value of energy density directly depends on the capacitance of full SCs and their cell voltage. Thus, an increase of SCs electrode specific capacitance together with the use of the wide potential window electrolyte can result in high performance SCs. Conductive polymer polyaniline (PANI) as well as carbonaceous materials graphene (G) or reduced graphene oxide (RGO) have been widely studied for usage in electrodes of SCs. Although pristine PANI electrodes have shown low cycling stability and graphene sheets can have low specific capacitance due to agglomeration during their preparation without a spacer, their synergetic effect can lead to high electrochemical properties of G/PANI composites. This review points out the best results for G/PANI composite in comparison to that of pristine PANI or graphene (or RGO). Various factors, such as the ratio between graphene and PANI, oxidants, time, and the temperature of chemical oxidative polymerization, which have been determined to influence the morphology, capacitance, cycling stability, etc. of the composite electrode materials measured in three-electrode system are discussed. Consequently, we provide an in-depth summary on diverse promising approaches of significant breakthroughs in recent years and provide strategies to choose suitable electrodes based on PANI and graphene.

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Application of Polymer Nanocomposites in Green Energy

Srivastava,

Singh,

Garg

et al. 2024

Handbook of Nanofillers

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Use of redox additive to enhance the electrochemical performance of Co3O4/polyaniline/graphene composite-based supercapacitors

Cited by 7 publications

References 56 publications

Effect of Molar Ratio Modulation of Cobalt Precursors on Supercapacitor Behavior of Engineered Co–Co₃O₄ Nanocomposite Electrodes

Effect of Molar Ratio Modulation of Cobalt Precursors on Supercapacitor Behavior of Engineered Co–Co₃O₄ Nanocomposite Electrodes

Synergetic Effect of Polyaniline and Graphene in Their Composite Supercapacitor Electrodes: Impact of Components and Parameters of Chemical Oxidative Polymerization

Application of Polymer Nanocomposites in Green Energy

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Use of redox additive to enhance the electrochemical performance of Co3O4/polyaniline/graphene composite-based supercapacitors

Cited by 7 publications

References 56 publications

Effect of Molar Ratio Modulation of Cobalt Precursors on Supercapacitor Behavior of Engineered Co–Co3O4 Nanocomposite Electrodes

Effect of Molar Ratio Modulation of Cobalt Precursors on Supercapacitor Behavior of Engineered Co–Co3O4 Nanocomposite Electrodes

Synergetic Effect of Polyaniline and Graphene in Their Composite Supercapacitor Electrodes: Impact of Components and Parameters of Chemical Oxidative Polymerization

Application of Polymer Nanocomposites in Green Energy

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Effect of Molar Ratio Modulation of Cobalt Precursors on Supercapacitor Behavior of Engineered Co–Co₃O₄ Nanocomposite Electrodes

Effect of Molar Ratio Modulation of Cobalt Precursors on Supercapacitor Behavior of Engineered Co–Co₃O₄ Nanocomposite Electrodes