Hierarchical Porous Integrated Co1−xS/CoFe2O4@rGO Nanoflowers Fabricated via Temperature‐Controlled In Situ Calcining Sulfurization of Multivariate CoFe‐MOF‐74@rGO for High‐Performance Supercapacitor

Ren, Chongting; Xu, Jia; Zhang, Wen; Hou, Ding; Xia, Zhengqiang; Huang, Dashuai; Hu, Jun; Chen, Sanping; Gao, Shengli

doi:10.1002/adfm.202004519

Cited by 152 publications

(71 citation statements)

References 70 publications

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“…11i-l). 148 It yielded an ultrahigh specic capacity of 2202 F g À1 at A g À1 (Fig. 11j), which was much higher than that of the individual components.…”

Section: Supercapacitorsmentioning

confidence: 94%

“…8g-j). 148 At 600 C, Co 1Àx S was generated preferentially maybe due to the lower bonding energy of Co-S than Fe-S. When the calcination temperature was increased to 700 C, the high bonding barrier of Fe-S was overcome, but only the CoFeS 2 phase formed since the activity of oxygen is insufficient to be involved in the reactions at this temperature.…”

Section: Design and Preparation Of Mof/graphene-derived Single Atom Nanocompositesmentioning

confidence: 98%

“…The sulfur atoms with high electronegativity can extract electrons from metal atoms for facilitated electron transport. 144 Using a MOF/ graphene composite as a precursor to synthesize metal suldes has been extensively studied and various methodologies have been developed till now, including solid-state methods by annealing a mixture of precursor and S powder at high temperatures, 72,76,[145][146][147][148][149][150] solution-phase methods (e.g., hydrothermal or solvothermal vulcanization reaction) using thioacetamide, 107,[151][152][153] thiourea, 154 or Na 2 S 92,155 as a sulfur source, and gas-solid reaction methods using H 2 S/argon as a reducing gas 156 or direct carbonization of a S-containing precursor in inert gas. 157 Thus, many kinds of metal sulde have been obtained, such as FeS, 60 FeS 2 , 63,145,146 152 CoZnNiS, 155 and so on.…”

Section: Design and Preparation Of Mof/graphene-derived Single Atom Nanocompositesmentioning

confidence: 99%

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Recent progress in metal–organic framework/graphene-derived materials for energy storage and conversion: design, preparation, and application

et al. 2021

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“…11i-l). 148 It yielded an ultrahigh specic capacity of 2202 F g À1 at A g À1 (Fig. 11j), which was much higher than that of the individual components.…”

Section: Supercapacitorsmentioning

confidence: 94%

Section: Design and Preparation Of Mof/graphene-derived Single Atom Nanocompositesmentioning

confidence: 98%

Section: Design and Preparation Of Mof/graphene-derived Single Atom Nanocompositesmentioning

confidence: 99%

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Recent progress in metal–organic framework/graphene-derived materials for energy storage and conversion: design, preparation, and application

et al. 2021

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“…Different defects often play different functions in improving the electrochemical performance of TMCs, such as vacancies increasing more active sites and enhancing conductivity [ 135 , 136 ], substitutional impurities providing additional capacitances and so on [ 131 , 137 ]. Specifically, the vacancies including metal vacancies and nonmetallic vacancies have been extensively explored to accelerate the intrinsic conductivity and redox activity of TMCs for supercapacitors [ 136 , 138 , 139 ]. In this part, taking oxygen vacancies, for example, we will mainly discuss the effect of oxygen vacancies on the electrochemical performance of transition metal oxides (TMOs) based supercapacitors.…”

Section: Regulation Of Tmc’s Electronic Structurementioning

confidence: 99%

Recent Developments of Transition Metal Compounds-Carbon Hybrid Electrodes for High Energy/Power Supercapacitors

et al. 2021

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Due to their rapid power delivery, fast charging, and long cycle life, supercapacitors have become an important energy storage technology recently. However, to meet the continuously increasing demands in the fields of portable electronics, transportation, and future robotic technologies, supercapacitors with higher energy densities without sacrificing high power densities and cycle stabilities are still challenged. Transition metal compounds (TMCs) possessing high theoretical capacitance are always used as electrode materials to improve the energy densities of supercapacitors. However, the power densities and cycle lives of such TMCs-based electrodes are still inferior due to their low intrinsic conductivity and large volume expansion during the charge/discharge process, which greatly impede their large-scale applications. Most recently, the ideal integrating of TMCs and conductive carbon skeletons is considered as an effective solution to solve the above challenges. Herein, we summarize the recent developments of TMCs/carbon hybrid electrodes which exhibit both high energy/power densities from the aspects of structural design strategies, including conductive carbon skeleton, interface engineering, and electronic structure. Furthermore, the remaining challenges and future perspectives are also highlighted so as to provide strategies for the high energy/power TMCs/carbon-based supercapacitors.

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“…As a modern energy storage system, supercapacitors have played a significant role in various application areas such as hybrid electric vehicle, portable electronic gadgets and other micro energy storage systems [3,4]. Supercapacitors can store charges in two different ways such as electric double layer capacitor and pseudocapacitor mechanisms.…”

mentioning

confidence: 99%

Facile Synthesis Mn2O3 Nanorod Arrays: A Significant Material for Supercapacitor Electrode Application

Amirtharaj¹,

Murugesan²

2021

Preprint

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Mn2O3 is a significant candidate for various applications. In the present work, the Mn2O3 nanorod arrays have been successfully prepared through facile sonochemical method with the aid of cetyl trimethyl ammonium bromide (CTAB) template. The crystalline phase and bonding properties have ben confirmed through X-ray diffraction analysis (XRD) and Fourier transform infrared (FTIR) spectroscopic analysis. The electrochemical properties were analysed through various techniques such as cyclic voltammetric and galvanostatic charge/discharge analysis. Interestingly, cyclic voltammetric (CV) curves confirms the electric double layer capacitor-based charge storage mechanism and it render the maximum specific capacitance of 647 Fg-1 at a scan rate 5 mVs-1 whereas the galvanostatic charge/discharge studies offer the specific capacitance of 656 Fg-1 at a current density of 1 Ag-1. The Mn2O3 nanorod arrays provide the maximum energy and power densities of 91.1 Wh Kg-1 and 14985 Wkg-1 respectively. In addition, the cyclic stability analysis exhibit only 12 % initial capacitance degradation over 3000 CV cycles at a scan rate of 100 mVs-1. The hopeful outcomes demonstrate the significant of the Mn2O3 nanorod arrays as electrode material for supercapacitor devices.

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Hierarchical Porous Integrated Co₁₋_xS/CoFe₂O₄@rGO Nanoflowers Fabricated via Temperature‐Controlled In Situ Calcining Sulfurization of Multivariate CoFe‐MOF‐74@rGO for High‐Performance Supercapacitor

Abstract: Supercapacitors have been widely explored as electrical energy storage devices because of the long cycle life, high power density, and high charge-discharge rate. [1] Compared to the electrical double-layer capacitor, pseudocapacitors (PCs), featuring

Cited by 152 publications

References 70 publications

Recent progress in metal–organic framework/graphene-derived materials for energy storage and conversion: design, preparation, and application

Recent progress in metal–organic framework/graphene-derived materials for energy storage and conversion: design, preparation, and application

Recent Developments of Transition Metal Compounds-Carbon Hybrid Electrodes for High Energy/Power Supercapacitors

Facile Synthesis Mn2O3 Nanorod Arrays: A Significant Material for Supercapacitor Electrode Application

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