Template-free prepared micro/nanostructured polypyrrole with ultrafast charging/discharging rate and long cycle life

Wang, Jie; Xu, Youlong; Feng, Yi; Zhu, Jianbo; Wang, Jingping

doi:10.1016/j.jpowsour.2010.10.066

Cited by 140 publications

(89 citation statements)

References 35 publications

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“…The several characteristic peaks at 1156, 1577, and 971 cm −1 are ascribed to ring-stretching mode in the curve of nano-ppy/OMMT. They corresponded to the D-band (C-C, the disordered graphite structure), G-band (C=C, sp 2 -hybridized carbon), and C-H in-plane deformation of ppy, respectively [24,25]. It is in line with the result of FTIR (Figure 2(a)).…”

Section: Resultssupporting

confidence: 86%

Effect of Nano-ppy/OMMT on the Physical and Electrochemical Properties of an Ionic Liquid Gel Polymer Electrolyte

Yang

Yao

2018

Journal of Nanomaterials

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A new type of nanopolypyrrole/organically modified montmorillonite-ionic liquid gel polymer electrolyte (ppy/OMMT-ILGPE) is prepared based on nanopolypyrrole/organically modified montmorillonite (ppy/OMMT), N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl)imide (PP14TFSI), lithium-bis(trifluoromethanesulfonyl) (LiTFSI), polyvinylidene difluoride (PVDF), methyl methacrylate (MMA), and benzoyl peroxide (BPO) by an in situ method. The effect of nano-ppy/OMMT on the physical and electrochemical properties of an ionic liquid gel polymer electrolyte is demonstrated. The results show that nanoppy/OMMT-ILGPE has a porous structure with a large surface area, and the diameter of the pores on the surface is approximately 1-2 m. The Li + transference number of 0.72 is achieved, and the ionic conductivity reaches up to 1.2 × 10 −3 S/cm at room temperature. Nano-ppy/OMMT-ILGPE has good thermal stability and mechanical properties. Meanwhile, nano-ppy/OMMT-ILGPE has fine cycle performance in the Li|nano-ppy/OMMT-ILGPE|LiNi 1/3 Co 1/3 Mn 1/3 O 2 coin cell. The good electrochemistry performance of nano-ppy/OMMT-ILGPE means that it can act as an ideal gel polymer electrolyte material for lithium ion batteries.

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Section: Resultssupporting

confidence: 86%

Effect of Nano-ppy/OMMT on the Physical and Electrochemical Properties of an Ionic Liquid Gel Polymer Electrolyte

Yang

Yao

2018

Journal of Nanomaterials

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“…In accordance with previous studies nanowire formation was highly dependent on the growth conditions [16]. Their growth was only observed between the potential range of 0.8 to 1.0 V and the monomer to dopant ratio was critical ( Fig.…”

Section: Electrochemical Growth Of Ppyetcn Nanowiressupporting

confidence: 91%

Facile template-free electrochemical preparation of poly[N-(2-cyanoethyl)pyrrole] nanowires

McCarthy

McGuinness

Alcock-Earley

et al. 2012

Electrochemistry Communications

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a b s t r a c t a r t i c l e i n f oIn this paper the first synthesis of poly[N-(2-cyanoethyl)pyrrole] (PPyEtCN) in a nanowire morphology is reported. The method employed is a facile, one step electrochemical growth, which does not require the use of any templates or surfactants. Using optimised conditions the nanowires nucleate to give a homogeneous film across the electrode surface, with lengths of approximately 2 μm and diameters of approximately 150 nm. Structural information on the nanowires was obtained using vibrational spectroscopy. Evidence is presented to support an instantaneous 3-D nucleation and growth mechanism for the nanowires.

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“…In the last case, polypyrrole nanostructures can be electrogenerated in the presence of a high concentration of weak-acid anions which confer to the pyrrole solution a pH between 6 and 10 and of non-acidic anions such as perchlorate ions. [13], [14], [15], [16], [17], [18] We have shown that for a pyrrole (Py) solution of pH 9, in the presence of low perchlorate concentration, oriented polypyrrole nanowires are obtained whereas for the highest perchlorate concentration, polypyrrole interconnected nanowire networks are electrogenerated (see Fig. 1).…”

Section: Introductionmentioning

confidence: 96%

Mechanism of formation of templateless electrogenerated polypyrrole nanostructures

Fakhry

Cachet

Debiemme‐Chouvy

2015

Electrochimica Acta

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To cite this version:Ahmed Fakhry, Hubert Cachet, Catherine Debiemme-Chouvy. Mechanism of formation of templateless electrogenerated polypyrrole nanostructures. Electrochimica Acta, Elsevier, 2015, 179, pp.297-303 AbstractIn the presence of a high concentration of weak-acid anions, such as monohydrogenophosphate which confer to a pyrrole aqueous solution a pH around 9, an ultra thin non-conductive overoxidized polypyrrole film is deposited on the electrode under an anodic polarization. In the same experimental conditions, after addition of perchlorate anions (C > 0.5 mM) in the pyrrole solution the electrooxidation of the monomers leads to the synthesis of a superhydrophilic nanostructured conductive polypyrrole film (network of nanofibers or oriented nanowires, 50-120 nm in diameter).The aim of the present paper is to confirm the mechanism that we have previously proposed and so to explain the spontaneous nanostructuration of the electrogenerated polypyrrole films. We have assumed that this templateless formation of nanostructures is notably due to the oxidation of water with production of hydroxyl radicals and nanobubbles of dioxygen. Due to the fact that pyrrole polymerization is associated to the release of protons, we have first verified that the electrode/solution interfacial pH is compatible with the water oxidation potential. For this purpose, during the monomer oxidation the interfacial pH variation has been monitored using a pH electrode having a flat glass membrane which was covered with a Pt grid used as the working electrode. Secondly, the presence of dioxygen nanobubbles has been indirectly confirmed by rotating the working electrode. Indeed rotation of the electrode allows eliminating the nanobubbles present inside the polypyrrole film. For the highest rotation speed tested (94 rad s -1 ), a very thin overoxidized film was electrogenerated. Our results are in good agreement with the fact that the nanobubbles protect the PPy film against the action of the hydroxyl radicals which react with the polypyrrole film leading to its overoxidation.

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Template-free prepared micro/nanostructured polypyrrole with ultrafast charging/discharging rate and long cycle life

Cited by 140 publications

References 35 publications

Effect of Nano-ppy/OMMT on the Physical and Electrochemical Properties of an Ionic Liquid Gel Polymer Electrolyte

Effect of Nano-ppy/OMMT on the Physical and Electrochemical Properties of an Ionic Liquid Gel Polymer Electrolyte

Facile template-free electrochemical preparation of poly[N-(2-cyanoethyl)pyrrole] nanowires

Mechanism of formation of templateless electrogenerated polypyrrole nanostructures

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