Pt-decorated graphene network materials for supercapacitors with enhanced power density

Que, Longkun; Zhang, Long; Wu, Chao; Zhang, Yong; Pei, Chonghua; Nie, Fude

doi:10.1016/j.carbon.2019.01.048

Cited by 26 publications

(8 citation statements)

References 42 publications

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“…However, the deposition of long chained carbon matrixes reduces slightly the specific surface (from 479.15 to 432.49 m 2 /g) and the micro/meso-porosity of the supporting material [125]. The second one concerns the HTC of the impregnated graphene/graphene content feedstock in order to ensure a total embedment of the graphene layer on the supporting solid [126,127]. To ensure the total incorporation of the graphene oxide composites, the HTC of graphene supported feedstock are usually followed by a thermal/chemical activation through pyrolysis carbonization (Fig.…”

Section: Carbonaceous Materials Coatingmentioning

confidence: 99%

Hydrochars production, characterization and application for wastewater treatment: A review

Azzaz

Khiari

Jellali

et al. 2020

Renewable and Sustainable Energy Reviews

150

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Hydrothermal carbonization (HTC) of wet solid wastes has been pointed out as an eco-friendly, flexible and highly efficient technology for the sustainable valorization of multiple sourced wastes. In this review paper, most recent studies on hydrochars (solid residue of the HTC process) production, characterization and application for wastewaters treatment was summarized and deeply discussed. The role of initial feedstock source nature and characteristics as well as the HTC experimental conditions including the temperature, the residence time and the pH media was assessed. Physical and chemical activation methods including the use of oxygen, steam, microwave, acids, alkaline, organics and salty solutions for the improvement of the physicochemical properties of the produced hydrochars are compared. The efficiency of these raw/modified hydrochars along with the involved mechanisms during organic (dyes) and mineral pollutants (heavy metals and nutrients) removal from aqueous solutions is also reviewed. Finally, this paper addresses the main challenges and also demonstrates insights on new directions for hydrochars research and development in the future.

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Section: Carbonaceous Materials Coatingmentioning

confidence: 99%

Hydrochars production, characterization and application for wastewater treatment: A review

Azzaz

Khiari

Jellali

et al. 2020

Renewable and Sustainable Energy Reviews

150

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“…The electrolyte was the same as the one use in the three-electrode testing system (1 molÁL -1 H 2 SO 4 ). The energy density (E) and power density (P) were calculated by E = (0.5 9 CV 2 9 1000)/3600 and P = (E 9 3600)/t, respectively [41][42][43].…”

Section: Characterization Of Materials and Electrochemical Measurementsmentioning

confidence: 99%

Preparation of mulberry-like RuO2 electrode material for supercapacitors

Pang

Wang

2020

Rare Met.

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As a newly emerging excellent energy storage device, supercapacitors have been widely studied due to their unique advantages. Electrode material is one of the key components that determine the performance of a supercapacitor. Among the various electrode materials of supercapacitors, RuO 2 has attracted great attention in the scientific community due to its high theoretical energy storage capability and excellent stability. However, most RuO 2 materials suffer the problem of low specific surface area, causing a much lower actual capacitance value compared to the theoretical performance of the material. In this work, a mulberry-like RuO 2 electrode material with large specific surface area (159.4 m 2 Ág -1 ) was successfully synthesized by a facial hydrothermal method. The electrochemical characterization has shown that the RuO 2 possesses a high specific capacitance of 400 FÁg -1 at a current density of 0.2 AÁg -1 and good capacitance retention rate of 84.7% after 6000 charge/discharge cycles under a current density of 10 AÁg -1 . The energy densities and power densities of the RuO 2 -AC supercapacitor vary from 25.0 to 11.7 WhÁkg -1 and 160 to 10,560 WÁkg -1 at current density ranging from 0.2 to 10.0 AÁg -1 , respectively.

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“…Therefore, it is necessary to develop some efficient energy storage devices to alleviate the existing problems. As a new type of energy storage device, supercapacitor is an important candidate for electrical energy storage device due to its high power densities, 3 long cycle life, 4 wide operating temperature range, 5 and environmental friendliness 6 . According to different charge storage mechanisms, supercapacitors can be divided into electric double‐layer capacitor and pseudocapacitor 7 .…”

Section: Introductionmentioning

confidence: 99%

Solvothermal synthesis of triphenylamine‐based covalent organic framework nanofibers with excellent cycle stability for supercapacitor electrodes

Xiong

Liu

Wang

et al. 2021

J of Applied Polymer Sci

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Covalent organic framework (COF) is a new class of porous materials used in energy storage devices. By solvothermal method, the triphenylamine-based covalent organic framework was synthesized using Schiff base coupling reaction between tris(4-aminophenyl) amine (TAPA) and tris(4-formylphenyl) amine. The regular pore structure of TPA-COFs not only exposes more active sites of triphenylamine structure to electrolyte solution during the chargedischarge process, but also accelerates the transport of ions in the active layer.At the same time, the π-electron conjugated system and the interlayer π-π stacking effect effectively promote the conduct of electrons in the two-dimensional and three-dimensional directions of COFs materials, which improves the electrochemical performance of the materials. TPA-COFs show a higher specific capacitance of 263.1 F/g at 0.1 A/g. At the same time, TPA-COFs materials exhibit a high specific surface area of 398.59 m 2 /g. After 5000 cycles of charge-discharge, the capacitance retention rate of TPA-COFs is 111%, showing excellent cycle stability.

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Pt-decorated graphene network materials for supercapacitors with enhanced power density

Cited by 26 publications

References 42 publications

Hydrochars production, characterization and application for wastewater treatment: A review

Hydrochars production, characterization and application for wastewater treatment: A review

Preparation of mulberry-like RuO2 electrode material for supercapacitors

Solvothermal synthesis of triphenylamine‐based covalent organic framework nanofibers with excellent cycle stability for supercapacitor electrodes

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