Synthesis and characterization of alkaline polyvinyl alcohol and poly(epichlorohydrin) blend polymer electrolytes and performance in electrochemical cells

Yang, Chun‐Chen; Lin, Syh‐Jae; Hsu, Sung-Ting

doi:10.1016/s0378-7753(03)00429-4

Cited by 82 publications

(31 citation statements)

References 17 publications

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“…It shows that the Q-PVA/PECH (5:1) composite polymer electrolyte, for which r = 0.0558 S cm -1 at ambient temperature, shows the highest ionic conductivity. It was also found that the ionic conductivity of the Q-PVA/PECH (5:1) polymer membrane (r 30°C = 0.0558 S cm -1 ) being quaternized by GTMAC was greatly increased, as compared with the PVA/PECH polymer membrane without any quaternized treatment (r 30°C = 0.0219 S cm -1 ) [16]. This may be due to the effect of the quaternization process or amination treatment.…”

Section: Ionic Conductivity and Methanol Permeability Measurementsmentioning

confidence: 90%

“…al. [16] prepared and studied alkaline poly (vinyl alcohol)/poly(epichlorohydrin) (PVA/PECH) blend polymer electrolyte and studied its electrochemical performance in Zn/air batteries. The ionic conductivity of the PVA/PECH polymer electrolyte was between 10 -3 and 10 -2 S cm -1 at room temperature.…”

Section: Introductionmentioning

confidence: 99%

“…PECH [16] was used owing to its excellent mechanical strength and chemical properties. The addition of a stiff polymer of PECH into PVA polymer matrix is to reduce the glass transition temperature (T g ) and the crystallinity of the PVA polymer and increase the amorphous phases of polymer matrix, then to increase its ionic conductivity.…”

Section: Introductionmentioning

confidence: 99%

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Alkaline direct methanol fuel cell based on a novel anion-exchange composite polymer membrane

Yang

2012

J Appl Electrochem

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The anion-exchange composite polymer membrane based on quaterized poly(vinyl alcohol)/poly(epichlorohydrin) (designated as Q-PVA/PECH) was prepared by a solution casting method and a quaternization process. The characteristic properties of the Q-PVA/PECH anionexchange composite polymer membranes were investigated by scanning electron microscopy, thermal gravimetric analysis, micro-Raman spectroscopy, and AC impedance method. Alkaline direct methanol fuel cells (ADMFC) comprised Q-PVA/PECH anion-exchange composite polymer membranes were assembled and examined. Experimental results indicate that an alkaline DMFC employing an inexpensive non-perfluorinated Q-PVA/PECH composite polymer membrane shows excellent electrochemical performances. The peak power densities of the DMFC using 4 M KOH ? 1 M CH 3 OH, 2 M CH 3 OH, and 4 M CH 3 OH fuels are 17. 22, 22.30, and 20.81 mW cm -2 , respectively, under ambient conditions. The Q-PVA/PECH composite polymer membrane appears as a viable candidate for use in an ADMFC.

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Section: Ionic Conductivity and Methanol Permeability Measurementsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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Alkaline direct methanol fuel cell based on a novel anion-exchange composite polymer membrane

Yang

2012

J Appl Electrochem

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“…Yang et al produced alkaline poly(vinyl alcohol) / poly(epichlorohydrin) copolymers for application in Zn-air batteries [82]. Arof et al produced poly(vinyl alcohol)-KOH blend alkaline electrolytes with conductivities < 10 -5 S cm -1 for a nickel-zinc cells [83].…”

Section: Review Of Other Relevant Aaem Systemsmentioning

confidence: 99%

Prospects for Alkaline Anion‐Exchange Membranes in Low Temperature Fuel Cells

Varcoe¹,

2005

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This article introduces the radical approach of applying alkaline anion-exchange membranes (AAEMs) to meet the current challenges with regards to direct methanol fuel cells (DMFCs).A review of the literature is presented with regards to the testing of fuel cells with alkaline membranes (fuelled with hydrogen or methanol) and also to candidate alkaline anionexchange membranes for such an application. A brief review of the directly related patent literature is also included. Current and future research challenges are identified along with potential strategies to overcome them. Finally, the advantages and challenges with the direct electrochemical oxidation of alternative fuels are discussed, along with how the application of alkaline membranes in such fuel cells may assist in improving performance and fuel efficiency. KeywordsLow temperature, Alkaline anion-exchange membrane, Direct methanol fuel cell, Polymer electrolyte fuel cell.

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“…Yang et al [18] prepared alkaline blend polymer electrolyte based on PVA/PECH for primary Zn-air batteries. The PVA/PECH (1:1) blend polymer electrolyte exhibits excellent chemical and mechanical properties, as listed in Table 5.…”

Section: Ionic Transport Propertiesmentioning

confidence: 99%

Alkaline blend polymer electrolytes based on polyvinyl alcohol (PVA)/tetraethyl ammonium chloride (TEAC)

Yang

Lin

2006

J Appl Electrochem

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Alkaline blend polymer electrolytes based on PVA/TEAC were obtained by a solution casting technique. Tetraethyl ammonium chloride (TEAC) was added to PVA polymer matrix to form an alkaline blend polymer electrolyte exhibiting excellent ionic transport and mechanical properties. The ionic conductivity of the alkaline PVA/TEAC blend polymer electrolyte was found to be of the order of 10 )2 S cm )1 at ambient temperature when the blend ratio of PVA:TEAC varied from 1:0.2 to 1:2. The characteristic properties of alkaline PVA/TEAC blend polymer electrolytes were examined using DSC, TGA, XRD, SEM, EA, stress-strain tests and AC impedance spectroscopy. The ionic transport properties for the blend polymer electrolytes were measured using Hittorf's method. It was found that the anionic transport numbers (t ) ) were between 0.82 and 0.99; the membranes are highly dependent on the types of alkali metal salts and the chemical composition of the polymer blend. The ionic transport and mechanical properties were greatly improved at the expense of the ionic conductivity. In this work we demonstrate that alkaline blend polymer electrolyte can be tailored with a blend technique to achieve specific characteristic properties for battery applications.

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Synthesis and characterization of alkaline polyvinyl alcohol and poly(epichlorohydrin) blend polymer electrolytes and performance in electrochemical cells

Cited by 82 publications

References 17 publications

Alkaline direct methanol fuel cell based on a novel anion-exchange composite polymer membrane

Alkaline direct methanol fuel cell based on a novel anion-exchange composite polymer membrane

Prospects for Alkaline Anion‐Exchange Membranes in Low Temperature Fuel Cells

Alkaline blend polymer electrolytes based on polyvinyl alcohol (PVA)/tetraethyl ammonium chloride (TEAC)

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