Properties of Polypyrrole‐Electrolyte‐Polypyrrole Cells

Mohammadi, Asadollah; Inganäs, Olle; Lundström, Ingemar

doi:10.1149/1.2108770

Cited by 96 publications

(58 citation statements)

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“…PTp and PTp-COOH showed specific capacities of 44.4 mAh g -1 with x = 0.136 and 963 mAh g -1 with x = 4.53, respectively. As studied in previous works 16,[32][33][34][35] , the electrochemical properties of PPy and PTp were not as high. In contrast, the introduction of carboxy groups to the Py and Tp rings plays an important role in the drastic increase in the x and specific capacity ( Table 1).…”

Section: Resultsmentioning

confidence: 62%

“…The present results suggest that both the molecular structures and morphologies influence the electrochemical properties. In previous works 16,[29][30][31][32][33][34][35][36][37][38] , the electrochemical properties of conductive polymers were not fully studied within 3.0-0.01 V. Since the nanoscale morphologies were not fully controlled, the electrochemical properties of conductive polymers for potential application as anodes have been overlooked in previous works. The advantages of nanostructures have been well studied in active materials based on inorganic compounds 57 .…”

Section: Discussionmentioning

confidence: 99%

“…1b). In earlier works 16,[29][30][31][32][33][34][35][36][37][38] , conductive polymers, such as polyacetylene (PA) [29][30][31] , PPy 32 , PTp [33][34][35] , and polyacene derivatives [36][37][38] , showed redox reactions with n doping in the potential range of 2.0-0.5 V vs. Li/Li + . The earlier works concluded that the n-doping reaction is not suitable for the anode-active material in lithium-ion batteries because of the low specific capacity and structure instability 16 .…”

Section: Introductionmentioning

confidence: 99%

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Multistage redox reactions of conductive-polymer nanostructures with lithium ions: potential for high-performance organic anodes

et al. 2018

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Conducive polymers have a wide range of applications originating from their π-conjugated systems. The redox reactions of conductive polymers with doping and dedoping of anions have been applied to cathodes for charge storage. In contrast, the redox reactions with cations have not been fully studied in anodes for charge storage. Here, we found that the nanostructures of conductive polymers, such as polypyrrole (PPy) . The introduction of a carboxy group to the pyrrole and thiophene rings enhanced the specific capacities up to 730 and 963 mAh g -1 , respectively. The enhanced electrochemical properties were not observed in the bulk-size conductive polymers. The results suggest that conductive-polymer nanostructures have potential for developing metal-free, high-performance charge storage devices.

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Section: Resultsmentioning

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multistage redox reactions of conductive-polymer nanostructures with lithium ions: potential for high-performance organic anodes

et al. 2018

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“…9 The literature have demonstrated the application of electroactive conjugated polymers in the solar cells development, 10,11 organic light-emitting devices, 12,13 and electrochromic and electrochemical devices. [14][15][16][17] Among this applications, the use of electroactive conducting polymers in pH sensing technology has been the focus of many studies in the last decade. 18,19 Ppy is one of the most studied conjugated polymers and has been widely applied in chemical sensors.…”

Section: Introductionmentioning

confidence: 99%

pH effects on the ohmic properties of bromophenol blue-doped polypyrrole film

Ferreira

Girotto

2010

J. Braz. Chem. Soc.

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A resposta ôhmica durante medidas de resistência in situ de filmes de polipirrol (ppy) dopados com azul de bromofenol (BPB) foi analisada para se estudar o efeito do pH nas propriedades analíticas dos filmes. As moléculas de BPB foram inseridas na matriz polimérica através de síntese eletroquímica sobre eletrodos digitalizados de ouro. Os filmes de ppy-BPB não apresentaram diminuição da resistência ôhmica linear com relação ao aumento do pH do meio, no intervalo de 1,5 a 11, sendo observado um aumento da resistência do filme após imersão em pH 7,5. O comportamento não linear é uma desvantagem para a aplicação do ppy-BPB como sensor de pH, no entanto, importantes informações sobre a interação entre o dopante e o polímero conjugado podem ser obtidas deste sistema. O comportamento ôhmico do filme de ppy-BPB pode ser explicado em termos da variação no equilíbrio entre as formas neutra e aniônica do corante preso na matriz de ppy. O estudo neste trabalho contribui para o desenvolvimento de sensores eficientes baseados em polímeros condutores.The ohmic response of bromophenol blue (BPB) doped polypyrrole (ppy) films obtained by in situ resistance measurements was studied to evaluate the pH effect on their analytical properties. BPB molecules were inserted into the ppy matrix by electrochemical synthesis onto digitized gold electrodes. Ppy-BPB films do not present decrease in the linear ohmic resistance when increasing pH values over the pH range 1.5-11.0, displayed by an increase in resistance after immersion in pH 7.5. The nonlinear behavior is a disadvantage for the application of the ppy-BPB film as pH sensor, however, meaningful information about the interaction between the dopant and the conjugated polymer can be obtained from the system. The ohmic behavior of the ppy-BPB films are explained in terms of the equilibrium between neutral and anionic dye species embedded in the ppy matrix. This work brings important contributions to the development of efficient conducting polymer-based sensors.Keywords: polypyrrole, bromophenol blue, ohmic properties, doped films IntroductionConducting polymers are well known materials with interesting optical, magnetic and electrical properties. 1-3The oxidation process in the electronic structure of a heterocyclic conjugated polymer, such as polypyrrole (ppy), 4,5 leads to the formation of polaron and bipolaron states. These energy states are related to remarkable properties of conjugated polymers that take place with the introduction of anion dopants into the polymer matrix to stabilize those charges (polaron and bipolaron) formed during oxidation. 6 The dopant used during the polymer synthesis can directly affect the electrical and structural properties of the conjugated polymer. 2,7,8 Study of the interaction between polymer and dopant is meaningful for the comprehension and applications of these materials. 9The literature have demonstrated the application of electroactive conjugated polymers in the solar cells development, 10,11 organic light-emitting devices, 12,13 and electro...

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“…[1][2][3][4][5][6] The optical properties associated with redox switching in some conducting polymers have been studied for possible use in electrochromic devices with high coloration efficiencies.7-14 Polypyrrole (PPy) is one of the most useful conducting materials, since it polymerizes easily, forms a membrane readily and has high conductivity and chemical stability. [15][16][17] Moreover, since it is easy to combine PPy with other anionic molecules, many functional composites with various properties have been investigated.…”

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confidence: 99%

Electrochemical and Spectroelectrochemical Characterization of Some Polypyrrole/Anthraquinone Sulfonate Films

Ahmed¹,

Nagaoka

Ogra

1998

ANAL. SCI.

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Conducting polymer films incorporating electroactive species have been used for sensor applications, and the redox properties have been utilized in charge-storage devices such as super-capacitors and batteries. [1][2][3][4][5][6] The optical properties associated with redox switching in some conducting polymers have been studied for possible use in electrochromic devices with high coloration efficiencies.7-14 Polypyrrole (PPy) is one of the most useful conducting materials, since it polymerizes easily, forms a membrane readily and has high conductivity and chemical stability. [15][16][17] Moreover, since it is easy to combine PPy with other anionic molecules, many functional composites with various properties have been investigated. [18][19][20] Especially, the PPy/quinone film is of analytical importance for the application in electrocatalysis and enzyme sensors. [21][22][23] In connection with our study, charge transfer of pyrrole copolymers substituted by anthraquinone, phenothiazine, or anthracene moieties has been reported. [24][25][26] The electrical conductance of PPy films doping with various anthraquinone and naphthalene sulfonates appears to be very well correlated to the number of sulfonate groups attached, with the highest conductance attained at one sulfonate group per dopant molecule. [27][28][29] Hepel has shown that the electrochemical quartz crystal microbalance (EQCM) technique can be used successfully to examine the doping level and the ion transport rate. 30In this research, we prepared several composite films consisting of polypyrrole and quinone sulfonates in aqueous solution by using electropolymerization techniques. FTIR spectral measurements and elemental analysis of PPy/9,10-anthraquinone-2-sulfonate (AQS -) revealed that the quinone sulfonates were incorporated in the polypyrrole matrix. Cyclic voltammetry and spectroelectrochemistry indicated the formation of diand trianions of AQS -during the reduction of the film. Further, it was found that the PPy/AQS -could function as a cation-exchanger at electrode potentials below about -0.3 V vs. Ag/AgCl. Experimental MaterialsPyrrole (Wako Chemicals Co.) was used without further purification. All quinones used here were reagent grade and were purified by vacuum sublimation or recrystallization when impurities were found in voltammograms. Tetraethylammonium perchlorate (TEAP) was dried in a vacuum and stored over P 2 O 5 . Milli-Q water was used throughout our experiments. Reagent grade dimethylsulfoxide (DMSO) and dimethylformamide (DMF) were used as received from Wako Chemicals. Equipment and proceduresGlassy carbon (GC) electrodes (Tokai, grade GC-20, diameter 3 mm) were polished with fine alumina (60 mm) and then sonicated for 5 min. Gold plated semitransparent plastic films (FM-1 Courtaulds Performance Films, USA, 1.75 cm 2 ) were used as We have fabricated composite films of polypyrrole/quinone sulfonate via electropolymerization. The FTIR investigation indicated the incorporation of quinone sulfonate in the polypyrrole (PPy) film to com...

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Properties of Polypyrrole‐Electrolyte‐Polypyrrole Cells

Cited by 96 publications

References 0 publications

Multistage redox reactions of conductive-polymer nanostructures with lithium ions: potential for high-performance organic anodes

Multistage redox reactions of conductive-polymer nanostructures with lithium ions: potential for high-performance organic anodes

pH effects on the ohmic properties of bromophenol blue-doped polypyrrole film

Electrochemical and Spectroelectrochemical Characterization of Some Polypyrrole/Anthraquinone Sulfonate Films

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