Applications of MxSey (M = Fe, Co, Ni) and Their Composites in Electrochemical Energy Storage and Conversion

Zhou, Huijie; Li, Xiaxia; Li, Yan; Zheng, Mingbo; Pang, Huan

doi:10.1007/s40820-019-0272-2

Cited by 93 publications

(57 citation statements)

References 140 publications

(192 reference statements)

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“…The redox processes during the charging lead to the storage of electrical energy as the chemical energy at the electrodes, which can be reconverted to the electric current during the discharge process when needed . On the other hand, in supercapacitors, the charge gets accumulated at the electrode/electrolyte interface during the charging processes, resulting in the generation of a static electric field/potential between the electrodes . There have been extensive research efforts on both batteries and supercapacitors, but supercapacitors have some merits over the batteries such as high charge/discharge rates, high operating safety, long cycle life and high power density .…”

Section: Introductionmentioning

confidence: 99%

Carbon Cloth‐based Hybrid Materials as Flexible Electrochemical Supercapacitors

et al. 2019

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Carbon cloths are the important materials composed of woven carbon fibres having the diameters in the range of 5–10 μm. These materials have been investigated for innumerable applications such as supercapacitors (symmetric and asymmetric), batteries, solar cells, and catalysis. They are found to be the best supports as supercapacitive materials by providing high surface area, conductivity and flexibility compared to much widely used substrate materials such as Ni foam and 1D Fe nanowires. High conductivity and surface area of carbon cloths enable ion diffusion and cause decrease in charge transfer resistance, resulting in an increase of specific capacitance of specific electrodes. Several supercapacitive metal oxides, chalcogenides, phosphides, MXenes, carbon nanotubes, graphene, and conductive polymers have been incorporated into carbon cloths to improve their energy storage activity. Further modification of carbon cloth surface via oxidation, doping and by the growth of different nanostructures is also helpful as it increases the electroactive surface area necessary for electrochemical interaction. The present review mainly focuses on the development of flexible supercapacitors using carbon cloth‐based substrate materials. Such flexible supercapacitors can be further utilized for an uninterrupted and steady power supply to wearable and portable electronic devices.

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Section: Introductionmentioning

confidence: 99%

Carbon Cloth‐based Hybrid Materials as Flexible Electrochemical Supercapacitors

et al. 2019

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“…For conventional Li 2 S cathode it is highly unlikely that one can invoke induced electron transfer process. Therefore to sustain such reaction in Li system other elements are nowadays routinely exploited for example the addition of iron, phosphate and further the transition metal-organic frame work (Geng et al, 2018;Jangir et al, 2018;Li et al, 2018a,b,c;Luo et al, 2019;Shi et al, 2019;Zhou et al, 2019). Further with reference to NDRGO-Mo-Li-2S complex, we can see that the capacitor capacity has been greatly improved after adding Mo.…”

Section: Sub-sectionmentioning

confidence: 90%

“…Here it is worth highlighting the exceptional electrochemical stability of the heavily nitrogen doped carbon derived from a natural protein polymer (silk cocoon) and its transition metal sulfide composites; as stability of such composite always remained a challenge for different energy applications (Cravanzola et al, 2016;Dubey et al, 2018;Geng et al, 2018;Jangir et al, 2018;Li et al, 2018a,b,c;Luo et al, 2019;Shi et al, 2019;Zhou et al, 2019).…”

Section: Sub-sectionmentioning

confidence: 99%

“…Li 2 S suffers from poor electrical conductivity and sluggish electrochemical performance. Li 2 S-carbon composite electrodes are currently being investigated to improve stability and electrochemical activity (Geng et al, 2018;Jangir et al, 2018;Li et al, 2018a,b,c;Luo et al, 2019;Shi et al, 2019;Zhou et al, 2019). In one of our earlier works, to improve the conductivity and stability of Li 2 S, we developed a synthetic approach viz., we synthesized Li 2 S in a conductivity cage of heavily nitrogen doped reduced graphene oxide (NDRGO) derived from the wild Tassar silk cocoon (Jangir et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

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“Induced Electron Transfer” in Silk Cocoon Derived N-Doped Reduced Graphene Oxide-Mo-Li-S Electrode

et al. 2019

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Developing 'carbon lithium sulfide composite (C-Li 2 S)' cathode is a promising strategy for Li-S battery. Quite interestingly, when Li and S are caged in a heavily nitrogen-doped reduced graphene oxide (NDRGO) matrix derived from Tassar silk cocoon, the composite (NDRGO-Li-S) electrode behaves like a supercapacitor. In this work, we first optimized the concentrations of sulfur and then introduced molybdenum in the NDRGO matrix to develop a stable NDRGO-Mo-Li-2S (where 2 stands for 2M) composite electrode. The electrode design process utilized the concepts of "embedded redox couples" and "induced electron transfer"; a putative strategy to alter internal electron-shuttling kinetics for applications in various charge storage devices; where a time of electron-shuttling is the key. In NDRGO-Mo-Li-2S composite the charge transport occurs via "induced electron transfer," where Li + , is an external oxidant, provoking the inter atom electron transfer between Mo(VI), the internal oxidant, and S(-II), the internal reductant in Mo-S redox couple. This redox reaction is reversed using NDRGO, an external reductant inducing inter atom electron flow across [Mo(V)-(S2)] to complete the starting to product and back cycle. Such a redox cycle is competent for the flow of electrons in a lasting charge storage material through this unique bio-inorganic hybrid approach.

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“…For example, He et al have used PPy NWs to act as both the backbone and conductive pathway for MnO 2 nanoflakes, which provided shortened distance and additional channels for ion diffusion and charge transfer. 1D‐nanostructured oxides, sulfides, selenides, and carbides as the core materials have also been reported widely . For instance, MnO 2 , Co 3 O 4 , ZnO, TiO 2 , and other oxides nanowire arrays were applied as scaffolds to build up the core/shell nanostructures.…”

Section: Applicationsmentioning

confidence: 99%

One‐dimensional and two‐dimensional synergized nanostructures for high‐performing energy storage and conversion

Wang

2019

InfoMat

233

142

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To address the worldwide energy challenges, advanced energy storage and conversion systems with high comprehensive performances, as the promising technologies, are inevitably required on a timely basis. The performance of these energy systems is intimately dependent on the properties of their electrodes. In addition to the electrode materials selection and their compositional optimization, materials fabrication with the designed nanostructure also provides significant benefits for their performances. In the past decade, considerable efforts have been made to promote the search for multidimensional nanostructures containing both onedimensional (1D) and two-dimensional (2D) nanostructures in synergy, namely, 1D-2D synergized nanostructures. By developing the freestanding electrodes with such unique nanoarchitectures, the structural features and electroactivities of each component can be manifested, where the synergistic properties among them can be simultaneously obtained for further enhanced properties, such as the increased number of active sites, fast electronic/ionic transport, and so forth. This review overviews the state-of-the-art on the 1D-2D synergized nanostructures, which can be broadly divided into three groups, namely, core/shell, cactus-like, and sandwich-like nanostructures. For each category, we introduce them from the aspects of structural features, fabrication methodologies to their successful applications in different types of energy storage/conversion devices, including rechargeable batteries, supercapacitors, water splitting, and so forth. Finally, the main challenges faced by and perspectives on the 1D-2D synergized nanostructures are discussed. K E Y W O R D S1D-2D synergized nanostructure, cactus-like nanostructure, core/shell nanostructure, energy storage/conversion, sandwich-like nanostructure

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Applications of MxSey (M = Fe, Co, Ni) and Their Composites in Electrochemical Energy Storage and Conversion

Cited by 93 publications

References 140 publications

Carbon Cloth‐based Hybrid Materials as Flexible Electrochemical Supercapacitors

Carbon Cloth‐based Hybrid Materials as Flexible Electrochemical Supercapacitors

“Induced Electron Transfer” in Silk Cocoon Derived N-Doped Reduced Graphene Oxide-Mo-Li-S Electrode

One‐dimensional and two‐dimensional synergized nanostructures for high‐performing energy storage and conversion

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