Conductive polymer/reduced graphene oxide/Au nano particles as efficient composite materials in electrochemical supercapacitors

Shayeh, Javad Shabani; Ehsani, Ali; Norouzi, Parviz; Jaleh, Babak

doi:10.1016/j.apsusc.2015.06.066

Cited by 201 publications

(38 citation statements)

References 50 publications

(47 reference statements)

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“…R SEI values were also lower in modified electrodes than PGE indicating formation of more conductive graphene layers on the PGE surface during the modification process (Table ) . The capacitances of modified electrodes were increased with the modification of chlorine doping and forming graphene according to the CPE1 and CPE2 which were higher in Cl‐GPGEs and Cl‐GO than PGE . Capacitive behavior of an electrodes can be determined by determination of the phase angle at low frequencies which was highest in Cl‐GPGE1 indicating the highest capacitive property (Table ) .…”

Section: Resultsmentioning

confidence: 99%

Novel chlorine doped graphene electrodes for positive electrodes of a vanadium redox flow battery

2018

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Summary One‐step electrochemical preparation of chlorine doped graphene coated electrodes was succeed by cyclic voltammetric method for the first time in the literature in this work. Because hetero atom and oxygen functional groups doped graphene‐based electrodes can improve the electrochemical performance of the battery with formed defects sides on the main structure of the electrodes, the modification of graphene‐based electrodes by chlorine and oxygen including functional groups such as ―Cl, ―ClO4, ―ClO3, ―OH, and ―C═O have been done by arranging of scanned potential in cyclic voltammetric treatment. The structural features of chlorine doped graphene electrodes were analyzed by scanning electron microscopic analysis. Chemical structures of the surface of the electrodes were elucidated by X‐ray photoelectron spectroscopy. Raman analyses were carried out to determine the optical properties of the electrodes. Chlorine doped graphene‐based electrodes were also used as positive electrode component of a vanadium redox battery for the first time in the literature. The electrodes showed great electrochemical performance as positive electrode materials of the battery.

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Section: Resultsmentioning

confidence: 99%

Novel chlorine doped graphene electrodes for positive electrodes of a vanadium redox flow battery

2018

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“…Ever increasing energy demand, depleting resources of fossil fuels, and increasing concern of climate change has motivated researchers to come out with greener and economically viable high-performance options for energy harvesting and storage devices [163][164][165][166][167][168][169][170][171]. Electrochemical energy and related technologies, which converts chemical energy into electrical energy without pollution, seems to be one of the effective way to address this problem.…”

Section: Ionic Liquid-based Electrolytes For Supercapacitor Applicationsmentioning

confidence: 99%

Ionic Liquid-Based Electrolytes for Energy Storage Devices: A Brief Review on Their Limits and Applications

et al. 2020

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Since the ability of ionic liquid (IL) was demonstrated to act as a solvent or an electrolyte, IL-based electrolytes have been widely used as a potential candidate for renewable energy storage devices, like lithium ion batteries (LIBs) and supercapacitors (SCs). In this review, we aimed to present the state-of-the-art of IL-based electrolytes electrochemical, cycling, and physicochemical properties, which are crucial for LIBs and SCs. ILs can also be regarded as designer solvents to replace the more flammable organic carbonates and improve the green credentials and performance of energy storage devices, especially LIBs and SCs. This review affords an outline of the progress of ILs in energy-related applications and provides essential ideas on the emerging challenges and openings that may motivate the scientific communities to move towards IL-based energy devices. Finally, the challenges in design of the new type of ILs structures for energy and environmental applications are also highlighted.Polymers 2020, 12, 918 2 of 37 and structural stability of the ionic species are extremely crucial and responsible for the efficient outputs in energy storage devices. In the light of this fact, high current (i.e., automotive applications) operating devices are required to have storage devices that have higher power density and faster ion transport properties. Previous studies have suggested that one of the most favorable approaches to simultaneously progress the safety, along with energy and power densities, is the incorporation of ILs into the electrolyte system [11].In past decades, room temperature ionic liquids (RTILs) have been acknowledged with noteworthy attention due to their excellent miscellaneous properties, such as thermal and chemical stability, tunable structure over the wide range of operating temperature, a broad electrochemical stability window, high ionic conductivity in the range of 10 −3 -10 −2 S cm −1 at room temperature, and non-flammability as a potential candidate for EES devices, such as LIBs [12], electric double-layer SCs [13][14][15], proton exchange membrane fuel cells, and solar cells [16][17][18][19]. Using ILs as an alternative to organic electrolytes has the advantage of improving the ions' mobility, as well as eliminating the hazards associated within the organic electrolytes. Additionally, ILs often have comparable zero or negligible vapor pressure at normal temperatures due to their high thermal stability. Because of the above statements, ILs are widely used as solvents or electrolytes for energy storage applications in recent times [7,18,[20][21][22][23][24][25][26][27].Typically, ILs are organic salts, also defined as molten salts, which have a lower melting point (<100 • C) with a wide degree of variation. Moreover, they are comprised of organic cations, such as an pyridinium (PY) [28], imidazolium (Im) [29][30][31][32], pyrrolidinium (PYR) [33][34][35][36], ammonium [37], and sulfonium [38], derivatives joined inorganic or organic anions, such as BF 4 − [39,40], PF 6 − [30], triflate (...

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“…1 Specific capacitance (SC) of electrodes is calculated from CV curves using the following equation [27]: Electrolyte were 0.005M YCl 3 .…”

Section: Preparation Of Yag Nanoparticles Via Cathodic Pulse Electrocmentioning

confidence: 99%

Synthesis and highly efficient supercapacitor behavior of a novel poly pyrrole/ceramic oxide nanocomposite film

2015

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A novel method of electrochemical synthesis of yttrium aluminum garnet (YAG: Al 5 Y 3 O 12 ) is successfully developed in the mixture of YCl3 3 and AlCl 3 aqueous solution. The electrosynthesized YAG are further annealed and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Ppy/YAG thin film electrode is synthesized electrochemically for electrochemical supercapacitor. Scanning electron micrographs clearly reveals the formation of nanocomposites on the surface of working electrode. Different electrochemical methods including galvanostatic charge-discharge (CD) experiments, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) are carried out in order to investigate the applicability of the system as a supercapacitor. Based on the electrochemical results obtained, Ppy/YAG gave higher specific capacitance, power and energy values than Ppy at a current density of 1mAcm −2 . Specific capacitance (SC) of Ppy and Ppy/YAG electrodes are calculated using CV method are 109 and 254 Fg -1 , respectively. This work introduces new nanocomposite materials for electrochemical redox capacitors with advantages including long life cycle and stability in an aqueous electrolyte to that of commonly used ruthenium based pervoskites.

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Conductive polymer/reduced graphene oxide/Au nano particles as efficient composite materials in electrochemical supercapacitors

Cited by 201 publications

References 50 publications

Novel chlorine doped graphene electrodes for positive electrodes of a vanadium redox flow battery

Novel chlorine doped graphene electrodes for positive electrodes of a vanadium redox flow battery

Ionic Liquid-Based Electrolytes for Energy Storage Devices: A Brief Review on Their Limits and Applications

Synthesis and highly efficient supercapacitor behavior of a novel poly pyrrole/ceramic oxide nanocomposite film

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