Modified sol-gel synthesis of Co3O4 nanoparticles using organic template for electrochemical energy storage

Shaheen, Irum; Ahmad, Khuram Shahzad; Zequine, Camila; Gupta, Ram K.; Thomas, Andrew G.; Malik, Mohammad Azad

doi:10.1016/j.energy.2020.119502

Cited by 37 publications

(28 citation statements)

References 48 publications

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“…20 For example, Aadil et al reported a specific capacitance value of 1425 F/g for their binder-free mesoporous Ag-doped Co 3 O 4 nanosheet prepared on NF by a hydrothermal technique. 3 Also, the specific capacitance value of our Ag/Co-Co 3 O 4 /NF composite thin film electrode is higher than the specific capacitance value of 103 F/g at 1 A/g of Co 3 O 4 nanoparticles prepared by a modified sol-gel synthesis using an organic template as reported by Shaheen et al 17 Equally, much lower specific techniques have also been previously reported by other authors. 1,8,15,42,43 Furthermore, the equivalent series resistance (ESR), which comprises the intrinsic resistance of the electroactive material, electrolyte resistance, and the contact resistance at the electrode-electrolyte interface, 35,44,45 In the specific capacitance variation with specific current graph in Figure 5D, it is observed that the specific capacitance decreases with increasing scan rates for both electrodes.…”

Section: Resultssupporting

confidence: 64%

“…In view of overcoming these challenges, several synthesis techniques such as hydrothermal, chemical precipitation, and sol‐gel have been and are being experimented constantly to prepare nanostructured cobalt oxide‐based materials. These techniques, however, require the inclusion of adhesive binders and conducting agents which increase the “dead volume” of the electrode thereby increasing the electrode resistance and reducing redox‐active sites 16‐19 . The electrodeposition, on the other hand, poses as a useful method for growing cobalt oxide‐based nanostructures directly onto substrates without the need for adhesive binders, presenting the advantages of obtaining increased apparent surface area owing to the resulting nanofeatures.…”

Section: Introductionmentioning

confidence: 99%

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Supercapacitor performance evaluation of nanostructured Ag‐decoratedCo‐Co₃O₄composite thin film electrode material

Nuamah

Noormohammed

Sarkar

2022

Intl J of Energy Research

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Summary Nanostructured Ag‐decorated Co‐Co3O4 composite thin film (Ag/Co‐Co3O4) synthesized on nickel foam (NF) by a combination of cyclic voltammetry and pulse reverse potential electrodeposition modes presents higher specific capacitance and its retention. The higher specific capacitance of 2800 F/g on Ag/Co‐Co3O4/NF composite thin film in comparison with 2580 F/g on Co‐Co3O4/NF at 1 A/g is attributable to the presence of nanostructured Ag in the composite film enhancing the ionic and electronic conductivity of the material. The morphology revealed by the scanning electron microscope correlates the electrochemical and capacitance behavior while the energy‐dispersive X‐ray spectroscopy spectra confirmed the presence of Co, Ag, and O in the Ag/Co‐Co3O4/NF composite thin film. The attenuated total reflection‐Fourier transform infrared spectra obtained further confirmed the presence of Co–O bonds. The Ag/Co‐Co3O4/NF composite thin film presented an amorphous nature as revealed by the X‐ray diffraction spectra. In addition, the Ag/Co‐Co3O4/NF electrode exhibited a maximum specific energy of 69.5 Wh/kg, specific power of 6.6 kW/kg and capacitance retention of 82.6% after 1000 cycles, while the Co‐Co3O4 electrode (with no Ag) showed lower specific energy of 60.8 Wh/kg, specific power of 5.8 kW/kg, and a capacitance retention of 78.2% after 1000 cycles. Furthermore, by the incorporation of Ag, the composite electrode showed a reduction in the equivalence series resistance value from 1.5 Ω cm2 (Co‐Co3O4/NF) to 1.0 Ω cm2 (Ag/Co‐Co3O4/NF) as well as in the charge transfer resistance (Rct) from 2.86 Ω cm2 (Co‐Co3O4/NF) to 0.96 Ω cm2 (Ag/Co‐Co3O4/NF) indicating the positive influence of the presence of Ag in the film. The electrochemical evaluation indicates that a synergistic effect between Ag and Co‐Co3O4 enhances supercapacitor electrode performance.

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Section: Resultssupporting

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Supercapacitor performance evaluation of nanostructured Ag‐decoratedCo‐Co₃O₄composite thin film electrode material

Nuamah

Noormohammed

Sarkar

2022

Intl J of Energy Research

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“…Since the technique enables the use of a huge variety of routes of synthesis, using different types of precursors (both organic and inorganic), it is still being enhanced and refined. Undoubtfully, its development provides a great contribution in the scientific world [17].…”

Section: Introductionmentioning

confidence: 99%

Chemical and Structural Characterization of Amorphous and Crystalline Alumina Obtained by Alternative Sol–Gel Preparation Routes

et al. 2021

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Aluminum oxide is one of the most commonly used materials in the industry. It is used in the field of catalysis, refractories, and optics. Despite the fact that there are many techniques available, there is still a great challenge in obtaining a material with desired and designed properties. Nevertheless, there is a great flexibility in making customized alumina materials with desired physicochemical properties synthesized by sol–gel methods. This work consists in characterizing the physicochemical properties of sol–gel synthesized aluminum oxide using different sol–gel preparation routes. Three different sols were obtained by using organic precursors and underwent thermal treatment. The structure (Middle Infrared Spectroscopy, Diffused Reflectance Infrared Spectroscopy, X-ray Diffraction, Magic Angle Spinning Nuclear Magnetic Resonance) and microstructure (Scanning Electron Microscopy with Electron Dispersive Spectroscopy) tests of the materials were carried out. The specific surface area was determined by using the Brunauer–Emmett–Teller (BET) method. Thermal analysis was performed for all the powders, in order to analyze the specific temperature of materials transformation.

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“…Interestingly, the specific capacitance of the NCO11 electrode is superior to those of recently reported results (Table S1). [40][41][42][43][44][45] Further, the EIS was utilized as a powerful tool to determine the resistance behavior of the electrodes. The Nyquist plots of the NCO11, NCO12, NCO21, NCO10, and NCO01 electrodes are shown in Figures 4F and S4D-E.…”

Section: Resultsmentioning

confidence: 99%

“…Interestingly, the specific capacitance of the NCO11 electrode is superior to those of recently reported results (Table S1). 40‐45 …”

Section: Resultsmentioning

confidence: 99%

Nanowire architectured porous bimetallic transition metal oxides for high performance hybrid supercapacitor applications

Sivakumar

Jung

Raj

et al. 2021

Intl J of Energy Research

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The electrochemical performance of the Faradaic battery-type binary metal oxide electrodes is dependent on the desirable architecture and the optimal cationic ratio. Herein, we report one-dimensional nanowire-like bimetallic spinel Ni x Co 3-x O 4 (NCO) electrode materials for high performance hybrid supercapacitor (HSC) applications. This unique nanowire architecture is beneficial for providing abundant exposed active sites onto the large accessible surface area, which results in facilitating ion transporting pathways. Remarkably, the optimal NCO electrode with the ratio of Ni/Co of 1 to 1 (NCO11) achieves the maximum specific capacitance of 1033 F g À1 at 1 A g À1 and the excellent rate capability of 74.55% at 30 A g À1 , far exceeding those of their single counterparts. Furthermore, the as-assembled HSCs integrating NCO11 and AC electrodes deliver large energy and power densities of 41.54 W h kg À1 and 44.95 kW kg À1 with excellent cyclic retention (96.12%).

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Modified sol-gel synthesis of Co3O4 nanoparticles using organic template for electrochemical energy storage

Cited by 37 publications

References 48 publications

Supercapacitor performance evaluation of nanostructured Ag‐decoratedCo‐Co₃O₄composite thin film electrode material

Supercapacitor performance evaluation of nanostructured Ag‐decoratedCo‐Co₃O₄composite thin film electrode material

Chemical and Structural Characterization of Amorphous and Crystalline Alumina Obtained by Alternative Sol–Gel Preparation Routes

Nanowire architectured porous bimetallic transition metal oxides for high performance hybrid supercapacitor applications

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Modified sol-gel synthesis of Co3O4 nanoparticles using organic template for electrochemical energy storage

Cited by 37 publications

References 48 publications

Supercapacitor performance evaluation of nanostructured Ag‐decoratedCo‐Co3O4composite thin film electrode material

Supercapacitor performance evaluation of nanostructured Ag‐decoratedCo‐Co3O4composite thin film electrode material

Chemical and Structural Characterization of Amorphous and Crystalline Alumina Obtained by Alternative Sol–Gel Preparation Routes

Nanowire architectured porous bimetallic transition metal oxides for high performance hybrid supercapacitor applications

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Supercapacitor performance evaluation of nanostructured Ag‐decoratedCo‐Co₃O₄composite thin film electrode material

Supercapacitor performance evaluation of nanostructured Ag‐decoratedCo‐Co₃O₄composite thin film electrode material