Fabrication of CoWO4@NiWO4 nanocomposites with good supercapacitve performances

Xu, Xiaoyang; Gao, Jianping; Huang, Gan-Yun; Qiu, H.; Wang, Zeyu; Wu, Jinze; Zhang, Pan; Xing, Fubao

doi:10.1016/j.electacta.2015.04.159

Cited by 84 publications

(30 citation statements)

References 26 publications

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“…where and 159.4% for the NWC-600-10, NWC-700-10 and NWC-800-10 samples after 1500 cycles, respectively. In addition, the sample of NWC-700-10 showed a higher capacitance value compared with Xu [37]'s work (NiWO 4 /rGO, 704 F g -1 ) and Kumar [16]'s work (NiWO 4 nanopowder, 171.28 F g -1 ).…”

Section: Electrochemical Characterisations Of Niwo 4 /Ni/carbon Fibrementioning

confidence: 71%

NiWO4/Ni/Carbon Composite Fibres for Supercapacitors with Excellent Cycling Performance

Wang

Jia

et al. 2016

Electrochimica Acta

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A novel NiWO 4 /Ni/carbon fibre composite was fabricated by the combination of electrospining with spray deposition and subsequent carbonization. It was revealed that NiWO 4 and Ni were uniformly dispersed outside and inside the carbon fibres, respectively. Used as supercapacitor electrode, the as-prepared fibre composite shows excellent capacity and cyclability. Galvanostatic discharge/charge test showed that the specific capacitance sharply increased from 151.1 to 792.2 F g −1 at 5 A g −1 after 1500 cycles, which was attributed to the oxidation of metallic Ni into ionic Ni 2+ forming more reactive sites. An electrochemical asymmetric supercapacitor was assembled using the composite fibres and porous carbon nanofibers, of which the energy density increased from 32.5 to 41.3 Wh kg −1 at 193.8 W kg −1. The results clearly showed that NiWO 4 /Ni/carbon fibre material is of potential in energy harvesting and storage.

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Section: Electrochemical Characterisations Of Niwo 4 /Ni/carbon Fibrementioning

confidence: 71%

NiWO4/Ni/Carbon Composite Fibres for Supercapacitors with Excellent Cycling Performance

Wang

Jia

et al. 2016

Electrochimica Acta

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“…For instance, Xu et al reported the preparation of CoWO 4 ,NiWO 4 ,and CoWO 4 -NiWO 4 nanocomposites through af acile chemical coprecipitation method and evaluated their performances in SCs. [114] The authors found that CoWO 4 with ap article-like morphologyh ad good stability, and flake-like NiWO 4 exhibited ah igh capacity.ACoWO 4 -NiWO 4 nanocomposite electrode with a1 :1 Co/Ni molar ratio showedahighers pecific capacitance of 862 Fg À1 at 10 mV s À1 , compared with those of pure NiWO 4 (704 Fg À1 )a nd CoWO 4 (458 Fg À1 )e lectrodes. Kumar and Karuppuchamyn demonstrated the microwave-assisted synthesis of CuWO 4 nanopowder.…”

Section: W-based Binary Metal Oxide Composite Materialsmentioning

confidence: 99%

“…For instance, Xu et al. reported the preparation of CoWO 4 , NiWO 4 , and CoWO 4 –NiWO 4 nanocomposites through a facile chemical coprecipitation method and evaluated their performances in SCs . The authors found that CoWO 4 with a particle‐like morphology had good stability, and flake‐like NiWO 4 exhibited a high capacity.…”

Section: Current Advances In Wo3‐based Scsmentioning

confidence: 99%

Review on Recent Progress in the Development of Tungsten Oxide Based Electrodes for Electrochemical Energy Storage

Shinde

2019

ChemSusChem

167

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Current progress in the advancement of energy‐storage devices is the most important factor that will allow the scientific community to develop resources to meet the global energy demands of the 21st century. Nanostructured materials can be used as effective electrodes for energy‐storage devices because they offer various promising features, including high surface‐to‐volume ratios, exceptional charge‐transport features, and good physicochemical properties. Until now, the successful research frontrunners have focused on the preparation of positive electrode materials for energy‐storage applications; nevertheless, the electrochemical performance of negative electrodes is less frequently reported. This review mainly focuses on the current progress in the development of tungsten oxide‐based electrodes for energy‐storage applications, primarily supercapacitors (SCs) and batteries. Tungsten is found in various stoichiometric and nonstoichiometric oxides. Among the different tungsten oxide materials, tungsten trioxide (WO3) has been intensively investigated as an electrode material for different applications because of its excellent charge‐transport features, unique physicochemical properties, and good resistance to corrosion. Various WO3 composites, such as WO3/carbon, WO3/polymers, WO3/metal oxides, and tungsten‐based binary metal oxides, have been used for application in SCs and batteries. However, pristine WO3 suffers from a relatively low specific surface area and low energy density. Therefore, it is crucial to thoroughly summarize recent progress in utilizing WO3‐based materials from various perspectives to enhance their performance. Herein, the potential‐ and pH‐dependent behavior of tungsten in aqueous media is discussed. Recent progress in the advancement of nanostructured WO3 and tungsten oxide‐based composites, along with related charge‐storage mechanisms and their electrochemical performances in SCs and batteries, is systematically summarized. Finally, remarks are made on future research challenges and the prospect of using tungsten oxide‐based materials to further upgrade energy‐storage devices.

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“…[30] It was also proposed that the iron centres act as catalytically active sites, leading to improved catalyst performance. [6] However, while materials such as CoWO 4 have received significant interest as electroactive compounds, [35,36,37] their application as OER and ORR catalysts has thus far been hindered by their low electronic and ionic conductivity. [34] Recent computational studies suggested that the electrocatalytic activity of 3d metal oxides can be further modulated by introducing high-valent heavy metals such as W, resulting in near-optimal adsorption energies for intermediates.…”

Section: Introductionmentioning

confidence: 99%

Composite Metal Oxide‐Carbon Nanotube Electrocatalysts for the Oxygen Evolution and Oxygen Reduction Reactions

Luo

Wang

et al. 2018

ChemElectroChem

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Electrocatalysts capable of performing both the oxygen evolution reaction (OER) and the oxygen reduction reaction (ORR) are key components for energy technologies including fuel cells, and water electrolysis. High-performance catalysts based on earth abundant components are therefore a prime research theme. Herein, we report the development of a series of novel composites based on nanostructured iron-doped CoWO 4 particles electrically linked to conductive carbon nanotubes (CNTs) using a facile one-pot hydrothermal method. It is shown that tuning of the iron content of Co 1-x Fe x WO 4 ÀCNT composites (x = 0-1) allows structural and reactivity control. The Co 1-x Fe x WO 4 ÀCNT composites are active and stable OER and ORR electrocatalysts, and follow the Sabatier principle. For Co 0.5 Fe 0.5 WO 4 ÀCNT, minimum overpotentials of h = 290 mV and low Tafel slopes of 42 mV dec À1 are achieved at a current density of j = 10 mA cm À2 for OER, and the Co 0.5 Fe 0.5 WO 4 ÀCNT shows high catalytic activity for ORR with half-wave potential of 0.74 V. As such, the composites show high potential as OER and ORR electrocatalysts, so that technologically viable, noble-metal-free, tunable electrocatalysts with relevance for alkaline water electrolysis can be designed from the bottom up.

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Fabrication of CoWO4@NiWO4 nanocomposites with good supercapacitve performances

Cited by 84 publications

References 26 publications

NiWO4/Ni/Carbon Composite Fibres for Supercapacitors with Excellent Cycling Performance

NiWO4/Ni/Carbon Composite Fibres for Supercapacitors with Excellent Cycling Performance

Review on Recent Progress in the Development of Tungsten Oxide Based Electrodes for Electrochemical Energy Storage

Composite Metal Oxide‐Carbon Nanotube Electrocatalysts for the Oxygen Evolution and Oxygen Reduction Reactions

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