Effects of swift copper (Cu2+) ion irradiation on structural, optical and electrochemical properties of Co3O4-CuO-MnO2/GO nanocomposites powder

Obodo, Raphael M.; Nwanya, Assumpta C.; Iroegbu, Chinedu; Ezekoye, B. A.; Ekwealor, A. B. C.; Ahmad, Ishaq; Mâaza, M.; Ezema, Fabian I.

doi:10.1016/j.apt.2020.02.010

Cited by 27 publications

(9 citation statements)

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“…This study indicate that Co 3 O 4 /MnO 2 @GO composite electrode is better than sing metal oxides/GO. Various resistances of our electrodes were assessed using constant phase element (CPE) diffusion model [33], this model fitted perfectly with Nyquist plot of EIS. Co 3 O 4 @GO possess electrolytic resistance (Re) of 12.0 Ω and working electrode's resistance (Rw) of 0.05 Ω. MnO 2 @GO and Co 3 O 4 /MnO 2 @GO electrodes possess same electrolytic resistance (Re) as well as working electrode's resistance (Rw) of 16.0 Ω and 0.05 Ω, respectively.…”

Section: Resultsmentioning

confidence: 86%

Performance Evaluation of Graphene Oxide Based Co₃O₄@GO, MnO₂@GO and Co₃O₄/MnO₂@GO Electrodes for Supercapacitors

et al. 2020

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Hydrothermally synthesized electrodes of Co 3 O 4 @GO, MnO 2 @GO and Co 3 O 4 /MnO 2 @GO were produced for usages in supercapacitors. Graphene oxide (GO) was incorporated in the nanocomposites used for electrodes synthesis due to its great surface area and electrical conductivity. The synergistic alliance among these composites and GO enhance electrodes performance, life span and stability. The structural properties as obtained from the X-ray diffraction (XRD) results suggest that nanocomposites are crystalline in nature. The morphological studies indicated that the nanocomposites have platelet nanoparticles with some agglomerations. The energy bandgaps estimated for the Co 3 O 4 @GO, MnO 2 @GO and Co 3 O 4 /MnO 2 @GO are 2.38 eV, 2.05 eV and 2.33 eV respectively The electrochemical studies provided highest specific capacitance from CV using 10 mV/s scan rates and GCD using 1.0 A/g current density were 765, 1215, 1518 and 975, 1358, 1718 F/g for Co 3 O 4 @GO, MnO 2 @GO and Co 3 O 4 /MnO 2 @GO respectively. These results obviously indicate that composites perform better than single transition metal oxide and the addition of graphene oxide enhanced electrodes performance.

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Section: Resultsmentioning

confidence: 86%

Performance Evaluation of Graphene Oxide Based Co₃O₄@GO, MnO₂@GO and Co₃O₄/MnO₂@GO Electrodes for Supercapacitors

et al. 2020

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“…The estimated specific capacitance of these electrodes obtained from the CV curve at 10 mV s–1 scan rate are 1580, 1655, 1950, 1356 and 208 F/g for pristine, illuminated with 2.5×10 15 , 5.0×10 15 , 7.5×10 15 and 1.0×10 16 ions/cm 2 consistently. Results indicate that the dosage of 5.0×10 15 ions/cm 2 illuminated sample provided the highest specific capacitance, and the CV curve showed a nearly perfect rectangular loop signifying great supercapactive property [6]. It was observed that at high‐energy doses, specific capacitance decreased significantly while the rectangular shaped loop observed in pristine and low energy dosage samples disappeared.…”

Section: Resultsmentioning

confidence: 90%

“…The interaction at the microscopic scale between various constituent metals improves the performances of the new composite such as charge separation efficiency, enhanced charge transfer, increased charge carrier lifetime etc. [4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of 8.0 MeV Carbon (C²⁺) Irradiation Effects on Hydrothermally Synthesized Co₃O₄−CuO−ZnO@GO Electrodes for Supercapacitor Applications

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Combination of transition metal oxides and carbon derivatives have received a lot of interest in last two decades for electrochemical energy storage due to their small size and high specific surface area. The effects of carbon ion irradiation on the properties of the electrodes were examined. The structural properties as obtained from the X-ray diffraction (XRD) results suggest that irradiation of the nanocomposite enhances the crystallinity of the materials up to the optimal dose of 5.0 × 10 15 ions/cm 2. Beyond this dose, there was a reduction in the crystallinity occasioned by distortion and defects in the structure of the material. The morphological studies indicated that the nanocomposites have spherical nanoparticles with some agglomerations. The agglomerations as well the particle sizes reduced with increase in the radiation dosages. The energy bandgaps estimated for the Co 3 O 4 À CuOÀ ZnO@GO reduced as energy dosages increases. The highest specific capacitance obtained from cyclic voltammetry (CV) plots at 10 mV/s scan rate and galvanostatic charge-discharge (GCD) were 1950 and 2045 F/g at a radiation dose of 5.0 × 10 15 ions/cm 2. Results indicate that carbon ion irradiations, especially low doses enhance the characteristics performance of these electrodes while high doses induce deficiencies and disorder to the Co 3 O 4 À CuOÀ ZnO@GO electrodes. These results also indicate that radiation is a useful tool to enhance or damage properties of nanomaterials especially with low energy doses.

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“…Smaller ESR amounts to better electrochemical performance [3,27]. Smaller resistance maintained by these electrodes could be as a result of the direct deposition done without additional inactive material in the form of binder posing more resistance to the ion intercalation [28][29][30]. R ct for the films increased as the deposition cycles increased [7,31].…”

Section: Electrochemical Studiesmentioning

confidence: 99%

Binder-free fabricated CuFeS₂ electrodes for supercapacitor applications

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Obodo

Nsude

et al. 2022

Mater. Res. Express

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Copper iron sulfide (CFS) (chalcopyrite) thin film electrodes have been synthesized for energy storage applications using the SILAR method without the use of a binder. The film’s structural as well as the morphological and the electrochemical characteristics were studied to check the effect of varying deposition cycles. The X-ray Diffraction (XRD) test reveals a crystalline tetragonal CuFeS2 (chalcopyrite) with a decreasing peak as the deposition cycle progresses. The micrographs of the films reveal a spherical but fleecy-like shape with particle aggregation at higher deposition cycles. The band gap increased slightly towards higher cycles and is of the range 1.15 to 1.22 eV. The CFS electrodes were evaluated in a three-electrode arrangement for supercapacitive application in a 2.0 M KOH electrolyte. The CFS electrodes function admirably. The greatest specific capacitance recorded was 537 F/g at 10 mV/s with capacitance retention of 93.5%. This is for CFS electrode deposited at 10 cycles; hence it has the greatest performance. This paper describes a simple, inexpensive, and repeatable method for fabricating electrodes for supercapacitors.

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Effects of swift copper (Cu2+) ion irradiation on structural, optical and electrochemical properties of Co3O4-CuO-MnO2/GO nanocomposites powder

Cited by 27 publications

References 32 publications

Performance Evaluation of Graphene Oxide Based Co₃O₄@GO, MnO₂@GO and Co₃O₄/MnO₂@GO Electrodes for Supercapacitors

Performance Evaluation of Graphene Oxide Based Co₃O₄@GO, MnO₂@GO and Co₃O₄/MnO₂@GO Electrodes for Supercapacitors

Evaluation of 8.0 MeV Carbon (C²⁺) Irradiation Effects on Hydrothermally Synthesized Co₃O₄−CuO−ZnO@GO Electrodes for Supercapacitor Applications

Binder-free fabricated CuFeS₂ electrodes for supercapacitor applications

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Effects of swift copper (Cu2+) ion irradiation on structural, optical and electrochemical properties of Co3O4-CuO-MnO2/GO nanocomposites powder

Cited by 27 publications

References 32 publications

Performance Evaluation of Graphene Oxide Based Co3O4@GO, MnO2@GO and Co3O4/MnO2@GO Electrodes for Supercapacitors

Performance Evaluation of Graphene Oxide Based Co3O4@GO, MnO2@GO and Co3O4/MnO2@GO Electrodes for Supercapacitors

Evaluation of 8.0 MeV Carbon (C2+) Irradiation Effects on Hydrothermally Synthesized Co3O4−CuO−ZnO@GO Electrodes for Supercapacitor Applications

Binder-free fabricated CuFeS2 electrodes for supercapacitor applications

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Performance Evaluation of Graphene Oxide Based Co₃O₄@GO, MnO₂@GO and Co₃O₄/MnO₂@GO Electrodes for Supercapacitors

Performance Evaluation of Graphene Oxide Based Co₃O₄@GO, MnO₂@GO and Co₃O₄/MnO₂@GO Electrodes for Supercapacitors

Evaluation of 8.0 MeV Carbon (C²⁺) Irradiation Effects on Hydrothermally Synthesized Co₃O₄−CuO−ZnO@GO Electrodes for Supercapacitor Applications

Binder-free fabricated CuFeS₂ electrodes for supercapacitor applications