Proton conducting interpenetrating polymer networks

Petty-Weeks, S.; Zupancic, Joseph J.; Swedo, J.R.

doi:10.1016/0167-2738(88)90295-0

Cited by 75 publications

(25 citation statements)

References 12 publications

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“…The decrease in σ for P-45 K and other samples with higher KOH composition could be explained on the basis that the rate of ion association has overtaken the rate of ion dissociation [15,26]. It is well-known that the PVA is a swollen type or gel polymer electrolyte [27][28][29][30][31][32][33]; hence, the water content in the sample could largely affect the conducting behaviour of the material. Assender and Windle [34] and Hodge et al [35] described that the water content in PVA could act like a plasticizer.…”

Section: Resultsmentioning

confidence: 93%

Effect of storage time on the properties of PVA–KOH alkaline solid polymer electrolyte system

Mohamad

Arof

2006

Ionics

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Polyvinyl alcohol (PVA) and potassium hydroxide (KOH) have been used to prepare alkaline solid polymer electrolytes (ASPE) films. The films were stored in a dry environment for 30 and 100 days. The highest room temperature conductivity for the PVA:KOH film with weight percentage ratio of 1:0.67 during storage for 30 and 100 days were (8.5±0.2)×10 −4 and (1.3±0.1)×10 −7 S cm −1 , respectively. The conductivity-temperature behaviour after 30 and 100 days of storage of the alkaline polymer electrolytes is Arrhenian and liquid-like. The structural, morphological and thermal studies of the ASPE films are also presented in this paper.

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Section: Resultsmentioning

confidence: 93%

Effect of storage time on the properties of PVA–KOH alkaline solid polymer electrolyte system

Mohamad

Arof

2006

Ionics

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“…Furthermore, in an attempt to improve electrical as well as mechanical properties, stable IPN networks of acid doped PVA complexes have been prepared by Petty-Weeks et al [21,22]. These acid doped PVA systems have shown high protonic conductivity but, in general, suffer from the problems of material degradation and hence electrochemical instability.…”

Section: *Corresponding Authormentioning

confidence: 98%

Effect of PVAc dispersal into PVA-NH4SCN polymer electrolyte

Shukla

Agrawal

2000

Ionics

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Abstract. The present paper deals with ion transport studies on a new proton conducting composite polymer electrolyte -(PVAx:NH4SCN)y:PVAc system. Complexation and morphology of the composite electrolyte films are discussed on the basis of X-ray diffraction and differential scanning calorimetry data. Coulometry and transient ionic current measurements revealed charge transport through protons. The maximum ion conductivity was found to be 7.4.10 -4 S.cm -1 for the composition: x = 0.15, y = 0.12. The observed conductivity behaviour is correlated to the morphology of the films. The temperature dependence of the electrical conductivity exhibits Arrhenius characteristics in two different temperature ranges separated by a plateau region related to morphological changes occurring in the electrolyte.

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“…The resulting acid-base complex systems constitute a new class of proton conducting polymer membranes. The polymers studied include: polyethylene oxides (PEO) [42,43], polyvinyl acetate (PVA) [44], polyacrylamide (PAAM) [45±47], polyethyleneimine (PEI) [48] and others. Among the inorganic acids, phosphoric acid (H 3 PO 4 ) is of special interest due to its thermal stability and high proton conductivity, even in the anhydrous form (100%) and at high temperatures.…”

Section: Acid-base Polymer Membranesmentioning

confidence: 99%

PBI‐Based Polymer Membranes for High Temperature Fuel Cells – Preparation, Characterization and Fuel Cell Demonstration

et al. 2004

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Proton exchange membrane fuel cell (PEMFC) technology based on perfluorosulfonic acid (PFSA) polymer membranes is briefly reviewed. The newest development in alternative polymer electrolytes for operation above 100 °C is summarized and discussed. As one of the successful approaches to high operational temperatures, the development and evaluation of acid doped polybenzimidazole (PBI) membranes are reviewed, covering polymer synthesis, membrane casting, acid doping, physicochemical characterization and fuel cell testing. A high temperature PEMFC system, operational at up to 200 °C based on phosphoric acid‐doped PBI membranes, is demonstrated. It requires little or no gas humidification and has a CO tolerance of up to several percent. The direct use of reformed hydrogen from a simple methanol reformer, without the need for any further CO removal, has been demonstrated. A lifetime of continuous operation, for over 5000 h at 150 °C, and shutdown‐restart thermal cycle testing for 47 cycles has been achieved. Other issues such as cooling, heat recovery, possible integration with fuel processing units, associated problems and further development are discussed.

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Proton conducting interpenetrating polymer networks

Cited by 75 publications

References 12 publications

Effect of storage time on the properties of PVA–KOH alkaline solid polymer electrolyte system

Effect of storage time on the properties of PVA–KOH alkaline solid polymer electrolyte system

Effect of PVAc dispersal into PVA-NH4SCN polymer electrolyte

PBI‐Based Polymer Membranes for High Temperature Fuel Cells – Preparation, Characterization and Fuel Cell Demonstration

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