Polyaniline–nickel oxide nanocomposites for supercapacitor

Singu, Bal Sydulu; Palaniappan, S.; Yoon, Kuk Ro

doi:10.1007/s10800-016-0988-3

Cited by 78 publications

(18 citation statements)

References 30 publications

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“…The fast decrease in specific capacitance of [VCMIm]Cl@PANI electrode materials was probably ascribed to the swelling and shrinkage of conducting PANI during the long time charge/discharge processes (52,53). Fortunately, a recent report demonstrated that superior stability of conductive polymer supercapacitors could be achieved through combining electrochemically active polymers with redox-active electrolytes (25).…”

Section: Electrochemical Properties Of Il@pani Nanocompositesmentioning

confidence: 99%

“…Therefore, PANI has been one of the most promising conducting polymers and widely applied in chemical sensors, energy conversion and storage, microelectronics, etc. Recently, PANI has been developed as a promising candidate for the electrode material of supercapacitor (24,25). The studies revealed that the microstructure has a critical effect on the capacitance performance of PANI (26)(27)(28).…”

Section: Introductionmentioning

confidence: 99%

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Maize-like ionic liquid@polyaniline nanocomposites for high performance supercapacitor

2019

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In this study, ionic liquids (IL) containing carboxyl and different alkyl chains were fabricated and used to dope polyaniline (PANI). The results revealed that IL@PANI composites could be facilely obtained via template-free polymerization of aniline using ammonium persulfate as the oxidant. The as-prepared IL@PANI composites were measured by FT-IR, XPS, and SEM. Electrochemical performances of IL@PANI nanocomposites were investigated by cyclic voltammetry and galvanostatic charge/discharge. The results indicate that the alkyl chains of ILs have an important influence on the morphology and capacitance performance of IL@PANI electrode materials. With the shorter alkyl group in ILs, IL@PANI materials presented higher specific capacitance. Especially, 1-vinyl-3-carboxymethyl-imidazolium chloride ([VCMIm]Cl)@PANI composite presented the highest specific capacitance. Cycling performance measurement demonstrated that 82% capacitance retention could be achieved after 1000 cycles in 0.5 M H2SO4 aqueous solution. Therefore, our strategy provides a new technique for PANI nanocomposites with tunable morphology and high performance.

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Section: Electrochemical Properties Of Il@pani Nanocompositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Maize-like ionic liquid@polyaniline nanocomposites for high performance supercapacitor

2019

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“…Wang et al synthesized the CuCo 2 O 4 ‐nanoforests, showing the charge transfer resistance of 2.56 Ω . From the CuCo 2 O 4 ‐Flowers bode plot (Figure d) phase angle is obtained, approximately −75° at 0.01 Hz, which is very close to the ideal capacitor phase angle of −90° …”

Section: Resultsmentioning

confidence: 67%

Tunability of Porous CuCo₂O₄ Architectures as High‐Performance Electrode Materials for Supercapacitors

et al. 2019

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Copper cobaltite (CuCo2O4) porous structures with different morphologies are prepared through a hydrothermal method and subsequent annealing process. The tunability of morphologies is succeeded by simply regulation of solvent medium and amount of the polyvinylpyrrolidone (PVP) which is served as structure directing agent. All the prepared samples have a mesoporous nature. Specifically, the CuCo2O4‐porous structures with flowers morphology have a higher surface area (43.2 m2 g−1) and porosity (0.18 cm3 g−1) than the other porous nano structures such as flakes, blades and wires. The maximum specific capacity of CuCo2O4‐Flowers is 466.4 C g−1 at a current density of 2 A g−1. The cycling stability of CuCo2O4‐Flowers shows capacity retention of 86.3 % at a high current density of 15 A g−1 after completion of 5000 charge‐discharge cycles. The electrochemical results demonstrate that the CuCo2O4‐Flower shows superior performance than the CuCo2O4‐Flakes, Blade and Wires.

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“…These results are attributed to a synergistic effect between PANI and metal oxides. [8][9][10][13][14][15] There are several proposed mechanism for the explanation of this synergism. One of them of is the creation of a conductive network between Ni(OH) 2 and PANI particles.…”

Section: Introductionmentioning

confidence: 99%

Contribution of polyaniline coating to the stability and performance of nickel hydroxide based electroactive materials

et al. 2020

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This study has been conducted for investigating the contribution of polyaniline (PANI) to the electroactivity of nickel hydroxide (NH) by using a combination of electrochemical, structural and morphological characterization techniques. NH, PANI and nickel hydroxide/PANI composite (NHP) electrodes were produced on nickel foam substrates. Electrodeposition and chemical bath deposition methods were used for the preparation of NH and PANI, respectively. All the electrochemical experiments were conducted in alkaline solutions. NH and PANI were used as reference materials and exhibited properties in accordance with the literature. Namely, for NH electrode capacity decayed by cycling because of the phase transformation from α to β-Ni(OH) 2 , and particles growth from 350 to 850 nm. Also, flower-like structure of the as prepared Ni(OH) 2 faded after 2000 cycles. On the other hand, PANI electrode although exhibited a decrease in the conductivity because of its degradation retained its capacity over cycling because of swelling and shrinking that led to an increased surface area. Composite electrode consisting of PANI and NH resulted in an improvement of capacity retention. At the beginning of cycling capacitance of the composite electrode was 0.64 F/cm 2 , capacity decreased to 0.47 F/cm 2 after 500 cycles then, continuously increased and finally reached to 0.54 F/cm 2 after 2000 cycles. Presence of PANI in combination with NH, limited the particle growth and contributed to the preservation of flower like structure of NH. Contrary to both NH and PANI electrodes, charge transfer resistance of NHP exhibited a decrease with cycling indicating a synergy between NH and PANI in addition to morphological changes.

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Polyaniline–nickel oxide nanocomposites for supercapacitor

Cited by 78 publications

References 30 publications

Maize-like ionic liquid@polyaniline nanocomposites for high performance supercapacitor

Maize-like ionic liquid@polyaniline nanocomposites for high performance supercapacitor

Tunability of Porous CuCo₂O₄ Architectures as High‐Performance Electrode Materials for Supercapacitors

Contribution of polyaniline coating to the stability and performance of nickel hydroxide based electroactive materials

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Polyaniline–nickel oxide nanocomposites for supercapacitor

Cited by 78 publications

References 30 publications

Maize-like ionic liquid@polyaniline nanocomposites for high performance supercapacitor

Maize-like ionic liquid@polyaniline nanocomposites for high performance supercapacitor

Tunability of Porous CuCo2O4 Architectures as High‐Performance Electrode Materials for Supercapacitors

Contribution of polyaniline coating to the stability and performance of nickel hydroxide based electroactive materials

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Tunability of Porous CuCo₂O₄ Architectures as High‐Performance Electrode Materials for Supercapacitors