Fabrication and shape evolution of CoS2 octahedrons for application in supercapacitors

Xing, Jichuan; Zhu, Yanli; Zhou, Qingwen; Zheng, Xiaodi; Jiao, Qingze

doi:10.1016/j.electacta.2014.05.118

Cited by 156 publications

(65 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1c, the characteristic peaks of the Co 511) and (440) planes of the spinel phase [6,12], which can be indexed to JCPDS no.20e0782. In addition, no impure phases in the Co 1.5 Ni 1.5 S 4 sample were observed, which confirms its pure spinel structure.…”

Section: Resultsmentioning

confidence: 99%

A highly electronic conductive cobalt nickel sulphide dendrite/quasi-spherical nanocomposite for a supercapacitor electrode with ultrahigh areal specific capacitance

Tang

Chen

et al. 2015

Journal of Power Sources

176

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

A highly electronic conductive cobalt nickel sulphide dendrite/quasi-spherical nanocomposite for a supercapacitor electrode with ultrahigh areal specific capacitance

Tang

Chen

et al. 2015

Journal of Power Sources

176

View full text Add to dashboard Cite

“…So far, electrode materials can be classified as metal oxides, polymers, and carbon-based composites [15][16][17]. Metal oxides and composites such as NiO, CoO, Co 3 O 4 /Ni(OH) 2 , MnO 2 , CuO, and CoS 2 exhibit higher specific capacitance than carbon and polymer materials [18][19][20][21][22][23][24] Experimental section Material preparation Figure 1 presents the hydrothermal fabrication process of the NiMn 2 O 4 nanosheets. In a typical synthesis, 0.582 g Ni(NO 3 ) 2 · 6H 2 O (purity 99.9 %, Sigma-Aldrich, USA), 0.965 g MnCl 2 · 4H 2 O (purity 99.9 %, Sigma-Aldrich, USA), and 0.4 g urea (AR, China) were stirred in a mixture of 5 mL ethanol and 35 mL deionized water for 30 min to obtain a clear solution.…”

Section: Introductionmentioning

confidence: 99%

Growth and electrochemical performance of porous NiMn2O4 nanosheets with high specific surface areas

Yan

Qiu

et al. 2015

J Solid State Electrochem

View full text Add to dashboard Cite

In this work, porous NiMn 2 O 4 nanosheets with large surface areas are successfully grown by a hydrothermal method and examined as electrodes for supe rcapac itors. Resu lts h ave sho wn th at the supercapacitor based on NiMn 2 O 4 electrodes exhibits the highest specific capacitance of 1321.6 F g −1 at a scan rate of 2 A g −1 , much higher than those of other supercapacitors made of metal oxides and composites. The NiMn 2 O 4 supercapacitor also shows a good cycling behavior, only 6.5 % capacitance decay after 1500 cycles. The NiMn 2 O 4 nanosheets possess a robust mechanical adhesion to Ni foam, which has been demonstrated by an ultrasonication test.

show abstract

“…30 and can be used as an electrocatalyst for the hydrogen evolution reaction (Tafel slope of 97 mV per decade). The high performance of the cobalt sulde could be due to its unique morphology.…”

Section: -29mentioning

confidence: 99%

Highly stable hollow bifunctional cobalt sulfides for flexible supercapacitors and hydrogen evolution

et al. 2016

View full text Add to dashboard Cite

Hollow structures of NiAs-type cobalt sulfide have been synthesized by a facile hydrothermal method. These hollow structured cobalt sulfides exhibit excellent electrochemical properties for supercapacitor applications (867 F g À1) and respectable hydrogen evolution activity.The symmetrical supercapacitor device fabricated using cobalt sulfide nanostructures showed an areal capacitance of 260 mF cm À2 with good flexibility and high temperature stability. The specific capacitance of the supercapacitor is enhanced over 150%, when the temperature is increased from 10 to 70 C.Over the last few decades, the increasing demand for energy has motivated the scientic community to develop high performance, sustainable, cost-effective and environmentally friendly materials for energy conversion and storage applications. 1-4Undoubtedly, materials for supercapacitors and hydrogen evolution are among the widely studied ones for these purposes. Supercapacitors are electrochemical energy storage devices primarily appealing for their excellent power density and long cycle life. 4-7 Carbon based electrodes are suitable for delivering high power density but have low energy density.8 Nevertheless, in recent years, the energy density of supercapacitors has been boosted by the use of metal oxides, which in turn sacrices the cycle life.4 Second, energy generation using a cleaner and cheaper method is of high importance due to increasing concerns of carbon emission. Hydrogen generation by splitting water is highly desired. The hydrogen evolution reaction (HER) is one of the key steps in the water splitting process.9 Ideally, the thermodynamic potential for the hydrogen evolution reaction should be at 0 V (vs. SHE). However, without an efficient catalyst, this reaction occurs at high overpotential.10 Presently, platinum is the most effective and durable catalyst for the hydrogen evolution reaction, but its widespread use is precluded due to its high cost and limited availability.At this juncture, it is essential to develop cost effective, sustainable and stable materials for both supercapacitor and HER applications. Recently, transition metal chalcogenides have attracted considerable attention for energy applications such as fuel cells, supercapacitors and batteries due to their high abundance, low cost and decent performance. 17Hierarchically porous nickel sulde has been synthesized for both the HER and oxygen evolution reaction (OER).18 The synthesized nickel sulde showed overpotentials of 60 mV for the HER and 180 mV for the OER in 1.0 M KOH at a current density of 10 mA cm À2 , respectively. Sharma et al. have synthesised ower-like ZnS for charge storage applications. 19They observed a high specic capacitance (226 F g À1 ) and specic capacitance was observed to decrease by 60% on increasing the scan rate from 20 to 200 mV s À1 . Other metal suldes such as WS 2 are also synthesized for HER, supercapacitor and battery applications. [20][21][22] As an important member of the transition metal sulde family, cobalt sulde is consi...

show abstract

Fabrication and shape evolution of CoS2 octahedrons for application in supercapacitors

Cited by 156 publications

References 45 publications

A highly electronic conductive cobalt nickel sulphide dendrite/quasi-spherical nanocomposite for a supercapacitor electrode with ultrahigh areal specific capacitance

A highly electronic conductive cobalt nickel sulphide dendrite/quasi-spherical nanocomposite for a supercapacitor electrode with ultrahigh areal specific capacitance

Growth and electrochemical performance of porous NiMn2O4 nanosheets with high specific surface areas

Highly stable hollow bifunctional cobalt sulfides for flexible supercapacitors and hydrogen evolution

Contact Info

Product

Resources

About