Selenium: Another metalloid beneficial for the electrochemical performance of Co electrode in alkaline rechargeable batteries

Du, Haiyan; Jiao, Lifang; Wang, Qinghong; Huan, Qingna; Wu, Peng; Song, Dawei; Wang, Yijing; Yuan, Huatang

doi:10.1016/j.jpowsour.2011.07.068

Cited by 16 publications

(5 citation statements)

References 29 publications

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“…10 Thus, the redox peaks can be attributed to a reversible electrochemical hydrogen adsorption−desorption reaction taking place on the C 60 /Co electrode. According to earlier results on the electrochemical reaction of Co in hydrogen storage process, 30 the reversible CV peaks observed here are ascribed to the quasi-reversible electrochemical reaction…”

Section: ■ Experimental Sectionsupporting

confidence: 85%

“…After wrapped by metal Co, the discharge capacities of the C 60 /Co composites increase to a certain degree. In particular, the C 60 /Co composite (m C60 :m Co = 1: 1) electrode can achieve a maximum discharge capacity as high as 907 mA h/g (3.32 wt % hydrogen), which is ∼2.10 times of the result for chemical precipitation prepared Co nanoparticles 31 and close to the theoretical hydrogen storage capacities of individual metal Co. 30 Even after 20 cycles, the discharge capacity still remains at 575 mAh/g (2.10 wt % hydrogen). Compared with traditional AB 5 54,55 type, AB 2 56 type, AB type, 57 and Mg-based alloy 58−60 hydrogen storage materials, the as-prepared C 60 /Co composites display a much higher discharge capacity and cycling stability, which are due to their good composite structure.…”

Section: ■ Experimental Sectionsupporting

confidence: 56%

Section: Resultsmentioning

confidence: 53%

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Mechanical Ball-Milling Preparation of Fullerene/Cobalt Core/Shell Nanocomposites with High Electrochemical Hydrogen Storage Ability

Bao¹,

Gao²,

Shen³

et al. 2014

ACS Appl. Mater. Interfaces

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The design and synthesis of new hydrogen storage nanomaterials with high capacity at low cost is extremely desirable but remains challenging for today's development of hydrogen economy. Because of the special honeycomb structures and excellent physical and chemical characters, fullerenes have been extensively considered as ideal materials for hydrogen storage materials. To take the most advantage of its distinctive symmetrical carbon cage structure, we have uniformly coated C60's surface with metal cobalt in nanoscale to form a core/shell structure through a simple ball-milling process in this work. The X-ray diffraction (XRD), scanning electron microscope (SEM), Raman spectra, high-solution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectrometry (EDX) elemental mappings, and X-ray photoelectron spectroscopy (XPS) measurements have been conducted to evaluate the size and the composition of the composites. In addition, the blue shift of C60 pentagonal pinch mode demonstrates the formation of Co-C chemical bond, and which enhances the stability of the as-obtained nanocomposites. And their electrochemical experimental results demonstrate that the as-obtained C60/Co composites have excellent electrochemical hydrogen storage cycle reversibility and considerably high hydrogen storage capacities of 907 mAh/g (3.32 wt % hydrogen) under room temperature and ambient pressure, which is very close to the theoretical hydrogen storage capacities of individual metal Co (3.33 wt % hydrogen). Furthermore, their hydrogen storage processes and the mechanism have also been investigated, in which the quasi-reversible C60/Co↔C60/Co-Hx reaction is the dominant cycle process.

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Section: ■ Experimental Sectionsupporting

confidence: 85%

Section: ■ Experimental Sectionsupporting

confidence: 56%

Section: Resultsmentioning

confidence: 53%

See 1 more Smart Citation

Mechanical Ball-Milling Preparation of Fullerene/Cobalt Core/Shell Nanocomposites with High Electrochemical Hydrogen Storage Ability

Bao¹,

Gao²,

Shen³

et al. 2014

ACS Appl. Mater. Interfaces

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“…142 Se was reported to be helpful in improving the electrochemical performance of Co electrode in alkaline rechargeable batteries. 143…”

Section: Oxygen Reduction Catalyst In Fuel Cellsmentioning

confidence: 99%

Selenium electrochemistry

Saji

Lee

2013

RSC Adv.

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Selenium (Se) is an important element belonging to the chalcogen family. Electrochemistry is of significant importance in various applications of Se and its compounds, ranging from non-vacuum processed solar cells, direct methanol/polymer electrolyte membrane fuel cells, electrocatalysts, batteries, and metallic alloys. However, rich information on Se electrochemistry remains unexplored in the last few decades. Here we made an attempt to assess the reported studies on electrochemical behaviours of Se. Fundamental concepts of Se electrochemistry in aqueous media and ionic liquids at various electrodes, polarographic and cyclic voltammetric analysis, cathodic and anodic stripping analysis, electrodeposition mechanism and electrocatalysis are discussed. Electrochemical atomic layer epitaxy (ECALE) in engineering Se atomic layers and fabrication of Se nanostructures by electrochemical methods are highlighted. Se electrochemistries in application areas are reviewed. Voltammetric studies of Se electrodeposition on molybdenum (Mo) electrode are presented with a view of its applicability in electrodeposited CuInSe 2 /CuIn(Ga)Se 2 (CIS/CIGS) solar cells. Introduction to seleniumSe, [Ar] 4s 2 3d 10 4p 4 is a group 16 (6A or chalcogens) member, discovered by J. J. Berzelius 1 and chemically similar to sulphur to a large extent. The preferred coordination of the Se atom is two with an optimum bond angle of 105u. 2 The bonding configuration of Se is in fact quite flexible and can have

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“…Now iron phosphate has been considered as very promising positive materials for LIBs(lithium ion batteries), due to their low cost, non-toxicity, high specific capability and good cycle performance [7][8][9]. However, the poor intrisic electric conducitivity and sluggish kinetics of electron and lithium ion transport made the FePO 4 materials have low specific capacity and poor capacity retention at high rate, this precluded the application of FePO 4 as electrodes in LIBs [10][11][12].…”

mentioning

confidence: 99%

Facile Synthesis of Hierarchical Architecture FePO<sub>4</sub>/C Composite Microspheres

Wang

et al. 2013

KEM

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Carbon coated micro/nanostructure FePO4composite materials were synthesized by hydrothermal methode, in which citric acid was used as both complexant and carbon resource. The dependence of synthesis process and complexant on the structure and morphology of composite materials were investigated by X ray diffraction (XRD) and scanning electronmicroscopy (SEM). The results showed that the sample consisted of dispersive microspheres with a quite uniform size distribution of 10μm through hydrothermal reaction at 130°C for 24h, when solution concetration was 0.03mol/L and pH value was nearly 2. After calcinated at 550°C for 3h, the microspheres were comprised of nanosticks, and their specific surface area can reach nearly 14 m2/g. Due to their micro/nanomicrosphere structure, the composite materials will benefit to the increase of lithium diffusion rate meanwhile preserve high tap density.

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Selenium: Another metalloid beneficial for the electrochemical performance of Co electrode in alkaline rechargeable batteries

Cited by 16 publications

References 29 publications

Mechanical Ball-Milling Preparation of Fullerene/Cobalt Core/Shell Nanocomposites with High Electrochemical Hydrogen Storage Ability

Mechanical Ball-Milling Preparation of Fullerene/Cobalt Core/Shell Nanocomposites with High Electrochemical Hydrogen Storage Ability

Selenium electrochemistry

Facile Synthesis of Hierarchical Architecture FePO<sub>4</sub>/C Composite Microspheres

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