Extra-Durable Hybrid Supercapacitor Based on Cobalt Sulfide and Carbon (MWCNT) Matrix Electrodes

Rathinamala, I.; Babu, I. Manohara; William, J. Johnson; Muralidharan, G.; Prithivikumaran, N.

doi:10.1016/j.est.2020.102200

Cited by 19 publications

(5 citation statements)

References 59 publications

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“…It is recognized that increasing the power energy of the MIBs to as high as that of the SCs is intrinsically challenging, owing to the insertion/extraction of the metal ions from the corresponding electrode materials being principally essential, that is, the energy storage mechanism [ 6 , 7 , 8 , 9 , 10 ]. On the contrary, it has been demonstrated that several electrode materials that followed a redox reaction can provide more capacitances as compared with the traditionally used carbonaceous materials [ 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study of the Influence of Nitrogen Content and Structural Characteristics of NiS/Nitrogen-Doped Carbon Nanocomposites on Capacitive Performances in Alkaline Medium

et al. 2021

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Supercapacitors (SCs) have been regarded as alternative electrochemical energy storage devices; however, optimizing the electrode materials to further enhance their specific energy and retain their rate capability is highly essential. Herein, the influence of nitrogen content and structural characteristics (i.e., porous and non-porous) of the NiS/nitrogen-doped carbon nanocomposites on their electrochemical performances in an alkaline electrolyte is explored. Due to their distinctive surface and the structural features of the porous carbon (A-PVP-NC), the as-synthesized NiS/A-PVP-NC nanocomposites not only reveal a high wettability with 6 M KOH electrolyte and less polarization but also exhibit remarkable rate capability (101 C/g at 1 A/g and 74 C/g at 10 A/g). Although non-porous carbon (PI-NC) possesses more nitrogen content than the A-PVP-NC, the specific capacity output from the latter at 10 A/g is 3.7 times higher than that of the NiS/PI-NC. Consequently, our findings suggest that the surface nature and porous architectures that exist in carbon materials would be significant factors affecting the electrochemical behavior of electrode materials compared to nitrogen content.

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Section: Introductionmentioning

confidence: 99%

A Comparative Study of the Influence of Nitrogen Content and Structural Characteristics of NiS/Nitrogen-Doped Carbon Nanocomposites on Capacitive Performances in Alkaline Medium

et al. 2021

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“…Various current densities (2, 1, 0.8, 0.5, and 0.3 A g −1 ) are given to the electrodes at a constant window (0‐1.8 V) as indicated in the inset of Figure 10C. The energy density (W h kg −1 ) and power density (W kg −1 ) of the Bi 2 S 3 /MWCNT based electrodes also are computed utilizing the relationships from the discharge curves 54

E goodbreak= \frac{1}{2} C_{s} V^{2} .

p goodbreak= \frac{E}{t} .

The specific capacitance (F g −1 ) derived from GCD measurements is ‘C s ’, and the discharge time is ‘t’.…”

Section: Resultsmentioning

confidence: 99%

“…The energy density (W h kg À1 ) and power density (W kg À1 ) of the Bi 2 S 3 / MWCNT based electrodes also are computed utilizing the relationships from the discharge curves. 54…”

Section: Resultsmentioning

confidence: 99%

Bi ₂ S ₃ can do it all: Sensitizer, counter electrode, and supercapacitor for symmetric solar cell assisted photo‐supercapacitor

Isaqu

Vnekatesan

Rajamanickam

et al. 2022

Intl J of Energy Research

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Summary The current research motivation is to fabricate and demonstrate Pt‐free dye‐sensitized solar cells (DSSCs) at a low‐cost and an electrode for supercapacitor. In this study, a well‐known sensitizer in quantum dot solar cells, that is, Bi2S3 and Bi2S3/MWCNT hybrids have been synthesized and positioned as an electrocatalyst for the reduction of triiodide to iodide (I3−/I−). Developed DSSC cell‐based on Bi2S3/MWCNT counter electrode (CE) achieves a power conversion efficiency of 4.8%, surpassing the corresponding Bi2S3 CE (1.06%) where the efficiency of the present CE yields ~83% of the conventional Pt CE efficiency (~5.8%). In addition, a series of electrochemical investigations reveal that the Bi2S3/MWCNT outperformed the pristine Bi2S3 in terms of electroconductivity and electrocatalytic behavior. This mixture is also favorable for supercapacitors and Bi2S3/MWCNT has the maximum specific capacity of 133 F g−1 with 1 A g−1 in 0.5 M of Na2SO4 with the acceptable capacitance retention of around 80% for 3000 cycles and excellent rate capability (48 F g−1 at 5 A g−1). Besides, the symmetric cell, that is, TiO2/Bi2S3/(I3−/I−)/Bi2S3 has been manufactured and tested successfully. Thus, Bi2S3 is not only a substitute for the conventional Pt‐based CE in DSSCs but also can be a potential energy storage material and sensitizer for photo‐supercapacitor applications.

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“…[47] (ii) Region II (0.3 V to À 0.15 V) sudden decay of charges has been observed in higher specific ChemistrySelect current and it was ascribed to the partial neutralization of the OH À ions. [48] Also, the specific capacity was again estimated from the charge/discharge curves using the relation, [44] C…”

Section: Supercapacitive Performance Of Cgc Electrodes: Three Electro...mentioning

confidence: 99%

“…The plot consists of two regions, (i) Region I (0.45 V to 0.3 V) the IR drop is quite large and it ascribed to the inner resistance of the electrode material [47] . (ii) Region II (0.3 V to −0.15 V) sudden decay of charges has been observed in higher specific current and it was ascribed to the partial neutralization of the OH − ions [48] . Also, the specific capacity was again estimated from the charge/discharge curves using the relation, [44]

true normalC_{s} = 2 normalI \int normalV dt / normalm Δ normalV

…”

Section: Supercapacitive Performance Of Cgc Electrodes: Three Electro...mentioning

confidence: 99%

Carboxymethyl Cellulose Grafted on Mesoporous Cobalt Oxide Milieu: Synthesis, Formation Mechanism and Electrochemical Features

Babu

Dass²,

Inbamani³

2022

ChemistrySelect

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In the present study, mesoporous Co x O y /C nanoflakes were fabricated using facile one-pot short span hydrothermal approach to explore its potential in energy storage devices. The fabricated composite electrode delivers maximum specific capacity of 372 C g À 1 at a current density of 1 A g À 1 with a meager charge transfer resistance (1.5 Ω). The excellent energy storage property is attributed to the presence of hierarchical arrangement of inter connected flaky structure that provides a fresh lanes for the mobilization of electrolyte ions. Moreover, an asymmetric supercapacitor (ASC) was assembled by sandwiching battery-type Faradic electrode and carbonaceous electrode. The device shows excellent electrochemical capability and noble cycling stability (90.9 % capacitance retention) after 10000 cycles of charge/discharge. Such enduring prominent properties of the fabricated device will make a benchmark in real time applications.

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Extra-Durable Hybrid Supercapacitor Based on Cobalt Sulfide and Carbon (MWCNT) Matrix Electrodes

Cited by 19 publications

References 59 publications

A Comparative Study of the Influence of Nitrogen Content and Structural Characteristics of NiS/Nitrogen-Doped Carbon Nanocomposites on Capacitive Performances in Alkaline Medium

A Comparative Study of the Influence of Nitrogen Content and Structural Characteristics of NiS/Nitrogen-Doped Carbon Nanocomposites on Capacitive Performances in Alkaline Medium

Bi ₂ S ₃ can do it all: Sensitizer, counter electrode, and supercapacitor for symmetric solar cell assisted photo‐supercapacitor

Carboxymethyl Cellulose Grafted on Mesoporous Cobalt Oxide Milieu: Synthesis, Formation Mechanism and Electrochemical Features

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Extra-Durable Hybrid Supercapacitor Based on Cobalt Sulfide and Carbon (MWCNT) Matrix Electrodes

Cited by 19 publications

References 59 publications

A Comparative Study of the Influence of Nitrogen Content and Structural Characteristics of NiS/Nitrogen-Doped Carbon Nanocomposites on Capacitive Performances in Alkaline Medium

A Comparative Study of the Influence of Nitrogen Content and Structural Characteristics of NiS/Nitrogen-Doped Carbon Nanocomposites on Capacitive Performances in Alkaline Medium

Bi 2 S 3 can do it all: Sensitizer, counter electrode, and supercapacitor for symmetric solar cell assisted photo‐supercapacitor

Carboxymethyl Cellulose Grafted on Mesoporous Cobalt Oxide Milieu: Synthesis, Formation Mechanism and Electrochemical Features

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Bi ₂ S ₃ can do it all: Sensitizer, counter electrode, and supercapacitor for symmetric solar cell assisted photo‐supercapacitor