One-Pot Hydrothermal Synthesis of Novel Cu-MnS with PVP Cabbage-Like Nanostructures for High-Performance Supercapacitors

Rao, S. Srinivasa; Durga, Ikkurthi Kanaka; Naresh, Bandari; Bak, Jin-Soo; Krishna, T. N. V.; Cho, Inho; Ahn, Jin-Woo; Kim, Hee-Je

doi:10.3390/en11061590

Cited by 36 publications

(13 citation statements)

References 41 publications

(23 reference statements)

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“…The result is displayed in Figure 7 a–d. The areal capacitance value was calculated based on the following equation:

where Cs, S,

, A, and k are the areal capacitance, area of the CV loop, potential window (

V), film area (cm 2 ), and scan rates (mV s −1 ), respectively [ 6 , 50 ]. Capacitance retention was calculated based on the following equation:

where C n is capacitance at n cycle and C 0 is initial capacitance.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Chemical and Electrochemical Stability of Polyaniline-Based Layer-by-Layer Films

Firda

Malik

et al. 2021

Polymers

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Polyaniline (PANI) has been widely used as an electroactive material in various applications including sensors, electrochromic devices, solar cells, electroluminescence, and electrochemical energy storage, owing to PANI’s unique redox properties. However, the chemical and electrochemical stability of PANI-based materials is not sufficiently high to maintain the performance of devices under many practical applications. Herein, we report a route to enhancing the chemical and electrochemical stability of PANI through layer-by-layer (LbL) assembly. PANI was assembled with different types of polyelectrolytes, and a comparative study between three different PANI-based layer-by-layer (LbL) films is presented here. Polyacids of different acidity and molecular structure, i.e., poly(acrylic acid) (PAA), polystyrene sulfonate (PSS), and tannic acid (TA), were used. The effect of polyacids’ acidity on film growth, conductivity, and chemical and electrochemical stability of PANI was investigated. The results showed that the film growth of the LbL system depended on the acidic strength of the polyacids. All LbL films exhibited improved chemical and electrochemical stability compared to PANI films. The doping level of PANI was strongly affected by the type of dopants, resulting in different chemical and electrochemical properties; the strongest polyacid (PSS) can provide the highest conductivity and chemical stability of conductive PANI. However, the electrochemical stability of PANI/PAA was found to be better than all the other films.

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“…The result is displayed in Figure 7 a–d. The areal capacitance value was calculated based on the following equation:

where Cs, S,

, A, and k are the areal capacitance, area of the CV loop, potential window (

V), film area (cm 2 ), and scan rates (mV s −1 ), respectively [ 6 , 50 ]. Capacitance retention was calculated based on the following equation:

where C n is capacitance at n cycle and C 0 is initial capacitance.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Chemical and Electrochemical Stability of Polyaniline-Based Layer-by-Layer Films

Firda

Malik

et al. 2021

Polymers

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“…Similarly, CoS/NF, CuS/NF, FeS/NF, and NiS/NF [135], CoMoO 4 [136]. NiMnO 3 [137], Co@NiSe 2 [138], C@Ni 0.9 Cu 0.1-S [139], α-MnO 2 , β-MnO 2 and Mn 3 O 4 [140], CuCo 2 S 4 [141], Ni 3 S 2 /MoS 2 [142], Cu-MnS with PVP [143] etc., were also successfully synthesized for a supercapacitor as electrode materials by measn of the hydrothermal method. The developed hydrothermal process showed promising effects for the synthesis of Cu-MnS with PVP nanocomposite for a high-performance supercapacitor.…”

Section: Hydrothermal Synthesismentioning

confidence: 99%

A Review of Supercapacitors: Materials Design, Modification, and Applications

et al. 2021

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Supercapacitors (SCs) have received much interest due to their enhanced electrochemical performance, superior cycling life, excellent specific power, and fast charging–discharging rate. The energy density of SCs is comparable to batteries; however, their power density and cyclability are higher by several orders of magnitude relative to batteries, making them a flexible and compromising energy storage alternative, provided a proper design and efficient materials are used. This review emphasizes various types of SCs, such as electrochemical double-layer capacitors, hybrid supercapacitors, and pseudo-supercapacitors. Furthermore, various synthesis strategies, including sol-gel, electro-polymerization, hydrothermal, co-precipitation, chemical vapor deposition, direct coating, vacuum filtration, de-alloying, microwave auxiliary, in situ polymerization, electro-spinning, silar, carbonization, dipping, and drying methods, are discussed. Furthermore, various functionalizations of SC electrode materials are summarized. In addition to their potential applications, brief insights into the recent advances and associated problems are provided, along with conclusions. This review is a noteworthy addition because of its simplicity and conciseness with regard to SCs, which can be helpful for researchers who are not directly involved in electrochemical energy storage.

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“…With the increase in scan rate, the peak current increases and also exhibits the similar CV shape with redox peaks, which indicate that the capacitance characteristics are mainly governed by Faradaic redox reactions. Furthermore, the anodic peak in positive direction and cathodic peak in negative direction were shifted with increasing the scan rate because the charge transfer kinetics limits the reaction [34]. From the following CV curves, composite CuS@WS 2 electrode was found to be the excellent energy storage material when compared to the CuS and WS 2 electrodes.…”

Section: Resultsmentioning

confidence: 95%

One-pot facile synthesis of nanorice-like structured CuS@WS2 as an advanced electroactive material for high-performance supercapacitors

et al. 2020

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Binder-free nanorice-like featured CuS@WS 2 structures have been synthesized using a simple and cost-effective chemical bath deposition approach and their application as electroactive material for high-performance supercapacitors. The surface properties of morphology, structure and composition of the as-prepared electrodes are examined using the scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The nanorice-like featured CuS@WS 2 electrode exhibits nanorice-like structures, which provides the abundant active sites for redox reactions and facilitates the electrolyte diffusion. The electrochemical performance of the supercapacitor electrodes was examined by cyclic voltammetry and galvanostatic charge-discharge studies. From the electrochemical tests, the CuS@WS 2 electrode exhibits a higher specific capacitance (C s) of 887.15 F g −1 at a current density of 3.75 A g −1 with greater energy density and excellent rate capability compared to bare CuS (588.0 F g −1) and WS 2 (19.40 F g −1) electrodes. Overall, these results demonstrate that the as-synthesized CuS@WS 2 could be a promising material for next-generation high-performance electrochemical energy storage applications.

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One-Pot Hydrothermal Synthesis of Novel Cu-MnS with PVP Cabbage-Like Nanostructures for High-Performance Supercapacitors

Cited by 36 publications

References 41 publications

Enhanced Chemical and Electrochemical Stability of Polyaniline-Based Layer-by-Layer Films

Enhanced Chemical and Electrochemical Stability of Polyaniline-Based Layer-by-Layer Films

A Review of Supercapacitors: Materials Design, Modification, and Applications

One-pot facile synthesis of nanorice-like structured CuS@WS2 as an advanced electroactive material for high-performance supercapacitors

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