Application of Nanocomposites for Supercapacitors: Characteristics and Properties

Yang, Dongfang

doi:10.5772/50409

Cited by 31 publications

(16 citation statements)

References 40 publications

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“…A variety of transition metal oxides have been utilized as electrode materials in electrochemical applications due to their good electrochemical response and cyclic stability [ 14 , 15 , 16 , 17 ]. Cobalt oxide (Co 3 O 4 ), among the transition metal oxides, has been widely used in many electrochemical applications due its abundance in nature, feasible synthesis, ease of tailor-made morphology, and favorable chemistry [ 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

Cobalt Oxide Nanograins and Silver Nanoparticles Decorated Fibrous Polyaniline Nanocomposite as Battery-Type Electrode for High Performance Supercapattery

et al. 2020

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In this study, silver (Ag) and cobalt oxide (Co3O4) decorated polyaniline (PANI) fibers were prepared by the combination of in-situ aniline oxidative polymerization and the hydrothermal methodology. The morphology of the prepared Ag/Co3O4@PANI ternary nanocomposite was studied by scanning electron microscopy and transmission electron microscopy, while the structural studies were carried out by X-ray diffraction and X-ray photoelectron spectroscopy. The morphological characterization revealed fibrous shaped PANI, coated with Ag and Co3O4 nanograins, while the structural studies revealed high purity, good crystallinity, and slight interactions among the constituents of the Ag/Co3O4@PANI ternary nanocomposite. The electrochemical performance studies revealed the enhanced performance of the Ag/Co3O4@PANI nanocomposite due to the synergistic/additional effect of Ag, Co3O4 and PANI compared to pure PANI and Co3O4@PANI. The addition of the Ag and Co3O4 provided an extended site for faradaic reactions leading to the high specific capacity. The Ag/Co3O4@PANI ternary nanocomposite exhibited an excellent specific capacity of 262.62 C g−1 at a scan rate of 3 mV s−1. The maximum energy and power density were found to be 14.01 Wh kg−1 and 165.00 W kg−1, respectively. The cyclic stability of supercapattery (Ag/Co3O4@PANI//activated carbon) consisting of a battery type electrode demonstrated a gradual increase in specific capacity with a continuous charge–discharge cycle until ~1000 cycles, then remained stable until 2500 cycles and later started decreasing, thereby showing the cyclic stability of 121.03% of its initial value after 3500 cycles.

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Section: Introductionmentioning

confidence: 99%

Cobalt Oxide Nanograins and Silver Nanoparticles Decorated Fibrous Polyaniline Nanocomposite as Battery-Type Electrode for High Performance Supercapattery

et al. 2020

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“…Most metal oxides are electrically resistive in character and the redox reactions here are limited to the surface regions. In order to accrue full advantage of their pseudocapacitive function, electrically conducting polypyrrole is encrusted by metal oxides [ 11 , 12 ], PEDOT [ 13 ], CNT [ 14 ], and graphene [ 15 , 16 ] in various nanostructured forms like nanoparticle [ 17 , 18 ], nanotube [ 19 , 20 ], and nanowire [ 21 , 22 ] as supercapacitor electrode. In these materials systems, the nanostructure features are randomly distributed in the two-dimensional (2-D) film form mainly due to the preparatory methods.…”

Section: Introductionmentioning

confidence: 99%

Vertically aligned ZnO nanorod core-polypyrrole conducting polymer sheath and nanotube arrays for electrochemical supercapacitor energy storage

Sidhu

Rastogi

2014

Nanoscale Res Lett

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Nanocomposite electrodes having three-dimensional (3-D) nanoscale architecture comprising of vertically aligned ZnO nanorod array core-polypyrrole (PPy) conducting polymer sheath and the vertical PPy nanotube arrays have been investigated for supercapacitor energy storage. The electrodes in the ZnO nanorod core-PPy sheath structure are formed by preferential nucleation and deposition of PPy layer over hydrothermally synthesized vertical ZnO nanorod array by controlled pulsed current electropolymerization of pyrrole monomer under surfactant action. The vertical PPy nanotube arrays of different tube diameter are created by selective etching of the ZnO nanorod core in ammonia solution for different periods. Cyclic voltammetry studies show high areal-specific capacitance approximately 240 mF.cm-2 for open pore and approximately 180 mF.cm-2 for narrow 30-to-36-nm diameter PPy nanotube arrays attributed to intensive faradic processes arising from enhanced access of electrolyte ions through nanotube interior and exterior. Impedance spectroscopy studies show that capacitive response extends over larger frequency domain in electrodes with PPy nanotube structure. Simulation of Nyquist plots by electrical equivalent circuit modeling establishes that 3-D nanostructure is better represented by constant phase element which accounts for the inhomogeneous electrochemical redox processes. Charge-discharge studies at different current densities establish that kinetics of the redox process in PPy nanotube electrode is due to the limitation on electron transport rather than the diffusive process of electrolyte ions. The PPy nanotube electrodes show deep discharge capability with high coulomb efficiency and long-term charge-discharge cyclic studies show nondegrading performance of the specific areal capacitance tested for 5,000 cycles.

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“…9,10,11,12 The current redox capacitor material of choice is RuO2, which can deliver capacities of around 720 F g -1 but is too costly and toxic for widespread use. 13 A number of other oxides have also been used, but the current interest in nitrides comes from the possibility of producing materials with a high electronic conductivity nitride core and an oxide coating with a high surface area. Manganese dioxide is one promising replacement for RuO2.…”

Section: Introductionmentioning

confidence: 99%

Solvothermal synthesis and electrochemical charge storage assessment of Mn₃N₂

Shah

Hector

et al. 2015

J. Mater. Chem. A

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Application of Nanocomposites for Supercapacitors: Characteristics and Properties

Cited by 31 publications

References 40 publications

Cobalt Oxide Nanograins and Silver Nanoparticles Decorated Fibrous Polyaniline Nanocomposite as Battery-Type Electrode for High Performance Supercapattery

Cobalt Oxide Nanograins and Silver Nanoparticles Decorated Fibrous Polyaniline Nanocomposite as Battery-Type Electrode for High Performance Supercapattery

Vertically aligned ZnO nanorod core-polypyrrole conducting polymer sheath and nanotube arrays for electrochemical supercapacitor energy storage

Solvothermal synthesis and electrochemical charge storage assessment of Mn₃N₂

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Application of Nanocomposites for Supercapacitors: Characteristics and Properties

Cited by 31 publications

References 40 publications

Cobalt Oxide Nanograins and Silver Nanoparticles Decorated Fibrous Polyaniline Nanocomposite as Battery-Type Electrode for High Performance Supercapattery

Cobalt Oxide Nanograins and Silver Nanoparticles Decorated Fibrous Polyaniline Nanocomposite as Battery-Type Electrode for High Performance Supercapattery

Vertically aligned ZnO nanorod core-polypyrrole conducting polymer sheath and nanotube arrays for electrochemical supercapacitor energy storage

Solvothermal synthesis and electrochemical charge storage assessment of Mn3N2

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Solvothermal synthesis and electrochemical charge storage assessment of Mn₃N₂