Proton conducting behavior of poly(ethylenimine)-H3PO4 systems

Tanaka, Ryuichi; Yamamoto, Hajime; Kawamura, Syosuke; Iwase, Taku

doi:10.1016/0013-4686(95)00207-u

Cited by 48 publications

(30 citation statements)

References 7 publications

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“…Three characteristic bands around 1090, 1008, and 970 cm −1 were respectively attributed to HPO 4 2− , P-OH, and H 2 PO 4 − stretching vibrations [9][10][11].…”

Section: Ft-ir Atr Spectramentioning

confidence: 99%

“…When the pure PBI membrane is doped with PA, PA acts as a proton conducting transporter and no water is needed for proton conduction in the membranes. The proton conductivities of PA-doped PBI (PA-PBI) membranes have been extensively investigated [7][8][9][10]. However, the mechanical properties of the PA-PBI membranes may deteriorate due to the very high PA-doping level.…”

Section: Introductionmentioning

confidence: 99%

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Novel nanocomposite membranes based on polybenzimidazole and Fe2TiO5 nanoparticles for proton exchange membrane fuel cells

Shabanikia

Javanbakht

Amoli

et al. 2015

Ionics

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In this work, Fe 2 TiO 5 nanoparticles were used for improving the proton conductivity, and water and acid uptake of polybenzimidazole (PBI)-based proton exchange membranes. The nanocomposite membranes have been prepared using different amounts of Fe 2 TiO 5 nanoparticles and dispersed into a PBI membrane with the solution-casting method. The prepared membranes were then physico-chemically and electrochemically characterized for use as electrolytes in hightemperature PEMFCs. The PBI/Fe 2 TiO 5 membranes (PFT) showed a higher acid uptake and proton conductivity compared with the pure PBI membranes. The highest acid uptake (156 %) and proton conductivity (78 mS/cm at 180°C) were observed for the PBI nanocomposite membranes containing 4 wt% of Fe 2 TiO 5 nanoparticles (PFT 4 ). The PFT 4 composite membrane showed 380 mW/cm 2 power density and 760 mA/ cm 2 current density in 0.5 V at 180°C at dry condition. The above results indicated that the PFT 4 nanocomposite membranes could be utilized as proton exchange membranes for high-temperature fuel cells.

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“…Three characteristic bands around 1090, 1008, and 970 cm −1 were respectively attributed to HPO 4 2− , P-OH, and H 2 PO 4 − stretching vibrations [9][10][11].…”

Section: Ft-ir Atr Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel nanocomposite membranes based on polybenzimidazole and Fe2TiO5 nanoparticles for proton exchange membrane fuel cells

Shabanikia

Javanbakht

Amoli

et al. 2015

Ionics

View full text Add to dashboard Cite

show abstract

“…With increase of temperature and the H 3 PO 4 concentration, however, the vehicle mechanism becomes predominant. A similar combination of conduction mechanisms clearly also appears in PEMs based on the polyethyleneimine/H 3 PO 4 system [58].…”

Section: Introductionmentioning

confidence: 86%

“…It is used for the production of PEMs of the acid-base type. Nitrogen-containing polybenzimidazole [1, 2,4,8,10], polyethyleneimine [57,58], and polyallylamine [56] have been used as the main polymer, and here the acid-base interaction leads to the formation of a proton-donating polymer/acid complex [1, 2,4]. One of the most promising systems in the creation of PEMs for use above 100°C is polybenzimidazole/H 3 PO 4 , for which a conductivity of 7.9·10 -2 S/cm at 200°C was achieved [8].…”

Section: Introductionmentioning

confidence: 99%

Polymeric organic–inorganic proton-exchange membranes for fuel cells produced by the sol–gel method

2011

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Approaches to the production of polymeric organic-inorganic hybrid proton-exchange membranes for fuel cells by the sol-gel method are summarized, and a classification is proposed for them. Features of the mechanism of conduction in the proton-conducting membranes are considered. Characteristics of the hybrid membranes and of fuel cells using them are presented. The main directions of research in this field are discussed.

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“…Thus, stabilizing the polymer matrix and creating opportunity to add acid into the HEC system. H 3 PO 4 has proved to be a good proton conductor in poly(ethylenimine) [21], poly(vinyl alcohol) [22] and poly (silamine) [23] chitosan/iota-carrageenan [24]. The source of proton conduction can be obtained by self-ionization and self-dehydration of H 3 PO 4 [25].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of phosphoric acid-doped hydroxyethyl cellulose electrolyte for use in supercapacitor

Sudhakar

Selvakumar

Bhat

2015

Mater Renew Sustain Energy

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A new borax cross-linked biodegradable solid polymer electrolyte based on hydroxyethyl cellulose and phosphoric acid (H 3 PO 4 ) was prepared. Characterizations of doped and undoped SPE were done using Fourier transform infrared spectroscopic and electrochemical studies. The ionic conductivity of the films increased with increase in acid concentration and the ionic conductivity obtained at 303 K was 4.1 9 10 -3 S cm -1 . Furthermore, effects of acid concentration on ionic conductivity and activation energy were discussed. Dielectric studies showed long tail-like feature indicating capacitive nature. A supercapacitor was fabricated and its electrochemical characteristics were studied. The supercapacitor showed a fairly good specific capacitance of 83 F g -1 at 2 mV s -1 and galvanostatic charge-discharge studies showed the mirror-like pattern with 98 % columbic efficiency. Cyclic stability was measured up to 2000 cycles.

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Proton conducting behavior of poly(ethylenimine)-H3PO4 systems

Cited by 48 publications

References 7 publications

Novel nanocomposite membranes based on polybenzimidazole and Fe2TiO5 nanoparticles for proton exchange membrane fuel cells

Novel nanocomposite membranes based on polybenzimidazole and Fe2TiO5 nanoparticles for proton exchange membrane fuel cells

Polymeric organic–inorganic proton-exchange membranes for fuel cells produced by the sol–gel method

Preparation and characterization of phosphoric acid-doped hydroxyethyl cellulose electrolyte for use in supercapacitor

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