Investigation of electrochemical properties of various transition metals doped SnO2 spherical nanostructures for supercapacitor applications

Asaithambi, S.; Sakthivel, P.; Karuppaiah, M.; Sankar, G. Udhaya; Balamurugan, Krishnaswamy; Yuvakkumar, R.; Thambidurai, M.; Ravi, G.

doi:10.1016/j.est.2020.101530

Cited by 98 publications

(25 citation statements)

References 58 publications

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“…C + and C – are the specific capacity, and Δ V + and Δ V – are the potential window . The specific capacitance ( C , F g –1 ) values were calculated for hybrid supercapacitors (HSCs) from GCD graphs by using the following eq . , where C is specific capacitance (F g –1 ), Δ t is the discharge time (s), I is a constant current (A), Δ V is the discharging potential window (V), and m is the mass of the active material (g).…”

Section: Methodsmentioning

confidence: 99%

Defect Induced in 3D-Rhombohedral MnCO₃ Microcrystals by Substitution of Transition Metals for Aqueous and Solid-State Hybrid Supercapacitors

Karuppaiah

Sakthivel

Asaithambi

et al. 2021

ACS Sustainable Chem. Eng.

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In this context, we synthesize pristine and transition metal (Fe, Co, Ni, and Cu) (TM)-doped uniform, 3Drhombohedral manganese carbonate (MnCO 3 ) microcrystals using a simple hydrothermal method. The substitution of different TMs notably induces structural defects in the 3D-rhombohedral microcrystals as evidenced by X-ray diffraction data and micro-Raman spectra. From the detailed investigation, the optimum Fe-MnCO 3 sample exhibits a higher specific capacity of 55.83 mAh g −1 at 1 A g −1 with a remarkable rate capability of 64.39%. This is attributed to uniform morphology, abundant electroactive sites, homogeneous particle size, a higher amount of structural defects, and lower electronic/ionic resistance. Further, aqueous and solidstate hybrid supercapacitors (HSCs) were fabricated using 3Drhombohedral Fe-MnCO 3 as a positive electrode and activated carbon (AC) as a negative electrode in aqueous KOH and PVA/ KOH polymer gel electrolytes, respectively. The aqueous HSC (AHSC) and solid-state HSC (SHSC) devices deliver maximum energy densities of 22.38 and 19.74 Wh kg −1 at power densities of 374 and 380 W kg −1 along with good initial capacitance retentions of 88.85% and 82.63% after 10,000 cycles, respectively. The practical applicability of fabricated devices is proved by successfully powering a pair of light-emitting diodes (LEDs) of different colors (red, green, and blue) using two SHSCs connected in series.

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Section: Methodsmentioning

confidence: 99%

Defect Induced in 3D-Rhombohedral MnCO₃ Microcrystals by Substitution of Transition Metals for Aqueous and Solid-State Hybrid Supercapacitors

Karuppaiah

Sakthivel

Asaithambi

et al. 2021

ACS Sustainable Chem. Eng.

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“…Figure 2C consists of the spherical morphology of grains with the addition of ASA to the structure. This is due to the lower surface energy or grain boundary energy of ASA which forms more grains 52 . High magnification SEM images show that PPy/ASA(0.02) coated CFt was much more porous and the presence of open and free interspace in between the structures is beneficial to improving the electrochemical performance for supercapacitors.…”

Section: Resultsmentioning

confidence: 99%

“…This is due to the lower surface energy or grain boundary energy of ASA which forms more grains. 52 High magnification SEM images show that PPy/ASA(0.02) coated CFt was much more porous and the presence of open and free interspace in between the structures is beneficial to improving the electrochemical performance for supercapacitors. This free interface and increased surface area enable the ion transport during charge-discharges to occur easily.…”

Section: Materials Analysismentioning

confidence: 99%

An ultrahigh‐energy density and wide potential window aqueous electrolyte supercapacitor built by polypyrrole/aniline 2‐sulfonic acid modified carbon felt electrode

Yazar

Arvas

Şahin

2022

Intl J of Energy Research

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Summary In this study, excellent performance and wide operating voltage are obtained with an aqueous electrolyte. Aqueous electrolytes are attracted more attention than other electrolytes (such as organic solvents, ionic liquids) in supercapacitor applications because of their safety, low cost, nontoxicity. Polypyrrole (PPy), aniline 2‐sulfonic acid (ASA) modified electrodes are hydrothermal synthesized on carbon felt (CFt) for supercapacitor applications. We investigate the presence of the concentration of ASA on the polymerization of the PPy. Furthermore, a high operating voltage of 3.0 V asymmetric supercapacitor (ASC) with graphite plate is assembled 3 M KCI. CFt/PPy/ASA(0.02)//GP exhibits a high specific capacitance value of 902.9 F g−1 at 5 mV s−1 and after 5000 cycle‐life testing 93.6% capacitance retention at a scan rate of 1000 mV s−1. The assembled ASC has an ultrahigh‐energy density of 1005 Wh kg−1 while delivering a power density of 3000 W kg−1 at a current density of 2 A g−1. The effect of ASA concentration on the supercapacitor performance has been observed.

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“…Asaithambi and coworkers reported the improved electrochemical properties of SnO 2 via different transition metals (Fe, Cu and Zn) doping. 131 When the Sn 4+ was substituted by other transition metals (Fe, Cu and Zn), the oxygen vacancies would be formed to maintain the local charge balance. Similarly, when the high valence state dopants replace the host low valence state metal ion, the cation vacancies can be engineered for charge balance, and thus exhibits improved electrochemical performances.…”

Section: Strategies For Defect Engineeringmentioning

confidence: 99%

Defect engineering of electrode materials towards superior reaction kinetics for high-performance supercapacitors

Yan

et al. 2022

J. Mater. Chem. A

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Investigation of electrochemical properties of various transition metals doped SnO2 spherical nanostructures for supercapacitor applications

Cited by 98 publications

References 58 publications

Defect Induced in 3D-Rhombohedral MnCO₃ Microcrystals by Substitution of Transition Metals for Aqueous and Solid-State Hybrid Supercapacitors

Defect Induced in 3D-Rhombohedral MnCO₃ Microcrystals by Substitution of Transition Metals for Aqueous and Solid-State Hybrid Supercapacitors

An ultrahigh‐energy density and wide potential window aqueous electrolyte supercapacitor built by polypyrrole/aniline 2‐sulfonic acid modified carbon felt electrode

Defect engineering of electrode materials towards superior reaction kinetics for high-performance supercapacitors

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Investigation of electrochemical properties of various transition metals doped SnO2 spherical nanostructures for supercapacitor applications

Cited by 98 publications

References 58 publications

Defect Induced in 3D-Rhombohedral MnCO3 Microcrystals by Substitution of Transition Metals for Aqueous and Solid-State Hybrid Supercapacitors

Defect Induced in 3D-Rhombohedral MnCO3 Microcrystals by Substitution of Transition Metals for Aqueous and Solid-State Hybrid Supercapacitors

An ultrahigh‐energy density and wide potential window aqueous electrolyte supercapacitor built by polypyrrole/aniline 2‐sulfonic acid modified carbon felt electrode

Defect engineering of electrode materials towards superior reaction kinetics for high-performance supercapacitors

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Product

Resources

About

Defect Induced in 3D-Rhombohedral MnCO₃ Microcrystals by Substitution of Transition Metals for Aqueous and Solid-State Hybrid Supercapacitors

Defect Induced in 3D-Rhombohedral MnCO₃ Microcrystals by Substitution of Transition Metals for Aqueous and Solid-State Hybrid Supercapacitors