Zn-doped FeOOH-polypyrrole electrodes for supercapacitors

Liang, Wenyu; Poon, R.; Zhitomirsky, Igor

doi:10.1016/j.matlet.2019.126542

Cited by 10 publications

(5 citation statements)

References 10 publications

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“…SEM studies of the electrodes before and after cycling showed electrode stability (Figure S4). It should be noted that other anode materials for asymmetric supercapacitors, such as FeOOH, 64 showed poor cyclic stability. Therefore, PPy-CuO 30 is promising for applications in anodes of supercapacitor devices.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Synergy of Charge Storage Properties of CuO and Polypyrrole in Composite CuO-Polypyrrole Electrodes for Asymmetric Supercapacitor Devices

Awad,

Nawwar,

Zhitomirsky

2024

ACS Appl. Energy Mater.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Synergy of Charge Storage Properties of CuO and Polypyrrole in Composite CuO-Polypyrrole Electrodes for Asymmetric Supercapacitor Devices

Awad,

Nawwar,

Zhitomirsky

2024

ACS Appl. Energy Mater.

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“…e increase of current signal by 32.6% for PPy NPs that is higher than only 22.4% for the PFFs nanocomposite is due to the improvement of surface area, which has been confirmed by the TEM analysis. According to Liang et al [52], the decrease in the oxidation peak current for the PFFs nanocomposite, both 5 and 10 wt%, appears to be related to the presence of FeOOH molecules that have relatively high resistance and weak cyclic stability. Furthermore, the SPCE modified with PPy NPs (∼170 mV) appeared to demonstrate lower peak separation values compared to the bare electrode as well as the other modified electrode due to an increase in the contact surface area between the nanostructure of PPy and the electrolyte [Fe(CN) 6 ] 3− as reported by Ahn et al [48].…”

Section: Electrochemical Properties Of Polypyrrole-iron Oxy-mentioning

confidence: 97%

Preparation and Characterisation of Polypyrrole-Iron Oxyhydroxide Nanocomposite as Sensing Material

Diauudin

Noor

Rashid

et al. 2020

Advances in Materials Science and Engineering

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Polypyrrole (PPy) has been widely used as a sensing material in many studies as PPy gives out noticeable reactions towards varieties of vapours of acids, bases, alcohols, alkanes, and chemical warfare agent (CWA) simulants. However, due to dispersion and mechanical properties limitation, PPy in nanoparticles (PPy NPs) has been introduced. The combinations between PPy NPs and nanosized metal oxide have shown promising improvement in the sensitivity of a sensor due to the larger total surface area of detection. In this study, the potential of PPy NPs and polypyrrole-iron oxyhydroxide (PFFs) nanocomposite as sensing materials in detecting the CWA simulant, dimethyl methylphosphonate (DMMP), is investigated. PPy NPs and modified PFFs nanocomposite were successfully synthesised using chemical oxidative polymerisation. The formation of PPy NPs and the effect of iron-oxyhydroxide (FeOOH) on the chemical interaction, morphology, and size of PPy NPs were investigated using attenuated total reflection-Fourier transform infrared (ATR-FTIR), field emission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM). ATR-FTIR analysis showed that the modified PFFs nanocomposite was successfully produced through the presence of a sharp –OH peak. The size of the prepared PPy NPs and PFFs nanocomposite was observed in the range of 50 to 70 nm and 110 to 160 nm, respectively, through TEM analysis. The electrochemical behaviour of PPy NPs and PFFs nanocomposite towards DMMP was investigated using cyclic voltammetry (CV) where, in the presence of DMMP, PPy NPs and PFFs nanocomposite showed 24% and 21% current signal reduction, respectively. This suggests that both PPy NPs and PFFs nanocomposite are able to discriminate an electrical signal both with and without the presence of DMMP.

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“…It was found that the reduction iin nanoparticle size resulted in enhanced capacitance [ 6 ]. Many investigations have targeted the fabrication of doped FeOOH with the goal of improving electrical conductivity and cyclic stability [ 8 , 11 ]. Electrochemical testing was performed in different electrolytes, such as Li 2 SO 4 [ 5 ], ionic liquid [ 9 ], KOH, Na 2 SO 3 and Na 2 SO 4 [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

“…KOH and LiOH electrolytes offer the advantages of high solubility and high conductivity, which are important for energy storage in supercapacitors [ 12 , 13 , 14 ]. However, Na 2 SO 4 is a more environmentally friendly electrolyte, which offers benefits for the fabrication of asymmetric devices with an enlarged voltage window of 1.6–2.0 V [ 6 , 7 , 11 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of High-Energy Ball Milling, Capping Agents and Alkalizer on Capacitance of Nanostructured FeOOH Anodes

Zhang

Zhitomirsky

2023

Nanomaterials

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This investigation is motivated by interest in nanostructured FeOOH anodes for aqueous asymmetric supercapacitors operating in Na2SO4 electrolyte. The research goal is the fabrication of anodes with high active mass loading of 40 mg cm−2, high capacitance and low resistance. The influence of high-energy ball milling (HEBM), capping agents and alkalizer on the nanostructure and capacitive properties is investigated. HEBM promotes the crystallization of FeOOH, which results in capacitance reduction. Capping agents from the catechol family, such as tetrahydroxy-1,4-benzoquinone (THB) and gallocyanine (GC), facilitate the fabrication of FeOOH nanoparticles, eliminate the formation of micron size particles and allow the fabrication of anodes with enhanced capacitance. The analysis of testing results provided insight into the influence of the chemical structure of the capping agents on nanoparticle synthesis and dispersion. The feasibility of a conceptually new strategy for the synthesis of FeOOH nanoparticles is demonstrated, which is based on the use of polyethylenimine as an organic alkalizer-dispersant. The capacitances of materials prepared using different nanotechnology strategies are compared. The highest capacitance of 6.54 F cm−2 is obtained using GC as a capping agent. The obtained electrodes are promising for applications as anodes for asymmetric supercapacitors.

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Zn-doped FeOOH-polypyrrole electrodes for supercapacitors

Cited by 10 publications

References 10 publications

Synergy of Charge Storage Properties of CuO and Polypyrrole in Composite CuO-Polypyrrole Electrodes for Asymmetric Supercapacitor Devices

Synergy of Charge Storage Properties of CuO and Polypyrrole in Composite CuO-Polypyrrole Electrodes for Asymmetric Supercapacitor Devices

Preparation and Characterisation of Polypyrrole-Iron Oxyhydroxide Nanocomposite as Sensing Material

Effect of High-Energy Ball Milling, Capping Agents and Alkalizer on Capacitance of Nanostructured FeOOH Anodes

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