Metal (M = Co, Ni) phosphate based materials for high-performance supercapacitors

Li, Xinran; Xiao, Xiao; Li, Qing; Wei, Jilei; Xue, Huaiguo; Pang, Huan

doi:10.1039/c7qi00434f

Cited by 182 publications

(68 citation statements)

References 138 publications

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“…Notably, the energy and power densities of SSCs based on BSAC-A-800 using 17 m NaClO 4 are comparable to or even much better than the previously reported biomass derived carbon-based SSCs. 2,4,13,18,41,42,44 In addition, three SSCs in series can easily light 16 LEDs which form the pattern of "B" (see inset of Fig. 8e).…”

Section: The Electrochemical Characterizations Of Symmetrical Supercamentioning

confidence: 99%

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“Water-in-salt” electrolyte enhanced high voltage aqueous supercapacitor with carbon electrodes derived from biomass waste-ground grain hulls

et al. 2020

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Section: The Electrochemical Characterizations Of Symmetrical Supercamentioning

confidence: 99%

“…1 Supercapacitors (SCs), as a new type of power source, have attracted signicant attention due to their high power and energy densities, fast charge and discharge time and long life cycle. 2 Electrode material and electrolyte are the key elements in supercapacitor applications that dictate the charge-storage mechanism.…”

Section: Introductionmentioning

confidence: 99%

“Water-in-salt” electrolyte enhanced high voltage aqueous supercapacitor with carbon electrodes derived from biomass waste-ground grain hulls

et al. 2020

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“…This kind of materials not only has ultra‐high specific surface area, rich topological structure, but high tailorability and designability. They have been extensively studied in the fields of gas adsorption, separation and storage, fluorescence, magnetism, and biopharmaceuticals . Because of their large surface area, it is beneficial to the adsorption of reactants, facilitating catalytic reactions.…”

Section: Introductionmentioning

confidence: 99%

Strategies for Improving the Performance and Application of MOFs Photocatalysts

Luo

Wu³

et al. 2019

ChemCatChem

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Residual pollutants in the water treatment process restrict the advanced treatment and purification of wastewater, because most of them have stable structures, and some are not easily to be enriched. Photocatalytic oxidation technology can directly use solar energy to drive a series of chemical reactions, which has advantages such as low energy consumption, mild reaction conditions and rarely secondary pollution. It is an effective way to solve the organic pollution problem in wastewater treatment. The key to this process is to find and design efficient photocatalysts. The current photocatalytic materials mainly include inorganic semiconductors and metal organic frameworks (MOFs). They have been studied for pollutants degradation, hydrogen evolution, CO2 reduction, and organic transformation. But, most of these catalysts have not been used in real application. In this paper, recent research advances in MOFs photocatalysts and the key factors affecting their photocatalytic efficiency were critically reviewed. It is believed that the pursuit of more efficient photocatalyst needs to be considered from the adsorption‐photocatalytic mechanism, redox‐free radical mechanism, valence‐level regulation mechanism and energy transfer mechanism of photocatalysis. It is very necessary to research and develop nanoscale and quantum level mixed valence MOFs photocatalysts, which are constructed by strong electron‐donating groups.

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“…Typically, for high‐performance SCs, hollow structures were investigated to increase their active surface areas and porosity for efficient transportation . In addition, hollow micro/nanostructured materials have proven their valuable applications in energy storage system (Li‐ion batteries and SCs) resulting from their shell functionality and novel interior geometry. Especially, the hollow nanostructure presents a competent link between electrode materials and the electrolyte, which also can improve the electrochemical performance .…”

Section: Introductionmentioning

confidence: 99%

Hollow Structural Transition Metal Oxide for Advanced Supercapacitors

Wei

Xue

et al. 2018

Adv Materials Inter

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are named as electrochemical double layer capacitors (EDLCs) and pseudocapacitors. [13][14][15] EDLCs produce capacitance from the electrostatic charge which is accumulated at electrode/electrolyte interface producing the electrostatic charge separation; besides, the ordinary electrode materials are carbon materials, such as activated carbon, graphene, and carbon nanotubes (Figure 1a). [16,17] Carbon-based materials, such as activated carbon, [18][19][20] carbon nanofibers, [21,22] carbon nanotubes, [23][24][25] and graphene, [26][27][28][29][30] present high surface areas, good electronic conductivities, and chemical stabilities. The other approach is pseudocapacitor, in which faradic processes are generated due to electroactive species (Figure 1b). The active materials in the electroactive species contain hydroxides, transition metal oxides, and conducting polymers. [31][32][33][34] Specifically, conducting polymers present high specific capacitance; however, their weaknesses are of high cost and poor cycling stability roots in their low conductivity. Beyond that, pseudocapacitive transition metal oxides serve as admirable supercapacitor electrodes. [35][36][37] Nonetheless, the poor cycling life and low energy density impose restrictions on their practical applications, especially for two electrode supercapacitor thus encouraged us to design new electrode materials from these pseudocapacitive metal oxides. In the meanwhile, the comprehensiveness of transition metal oxides/hydroxides and carbon-based materials led to high quality of performance and arose significant attention. [34,38,39] For example, on account of the superior pseudocapacitive performance, RuO 2 has attracted increasing attention, although it exhibits a limitation in practical applications due to its high cost. [40,41] Due to the fact, RuO 2 ·xH 2 O/carbon nanofiber composites obtained by Pico et al. present high specific capacitance and long cycle life. [42] Typically, for high-performance SCs, hollow structures were investigated to increase their active surface areas and porosity for efficient transportation. [43][44][45] In addition, hollow micro/nanostructured materials have proven their valuable applications in energy storage system (Li-ion batteries [46][47][48][49][50] and SCs [51][52][53][54] ) resulting from their shell functionality [55] and novel interior geometry. Especially, the hollow nanostructure presents a competent link between electrode materials and the electrolyte, which also can improve the electrochemical performance. [56] The hollow structure also possesses far more cavities, which works as an ''ion reservoir'' and ample room, in favor of lattice expansion. [57,58] So far, it is common to obtain hollow structures via template-method and water/oil/water (W/O/W) Electrochemical capacitors (supercapacitors, SCs), have been deemed to be one of the most promising powerful electrochemical energy storage devices, owing to that SCs have long cycle lives, high power densities, and fast recharge capabilities. Transition metal oxid...

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Metal (M = Co, Ni) phosphate based materials for high-performance supercapacitors

Cited by 182 publications

References 138 publications

“Water-in-salt” electrolyte enhanced high voltage aqueous supercapacitor with carbon electrodes derived from biomass waste-ground grain hulls

“Water-in-salt” electrolyte enhanced high voltage aqueous supercapacitor with carbon electrodes derived from biomass waste-ground grain hulls

Strategies for Improving the Performance and Application of MOFs Photocatalysts

Hollow Structural Transition Metal Oxide for Advanced Supercapacitors

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