Quaternized poly(vinyl alcohol)/alumina composite polymer membranes for alkaline direct methanol fuel cells

Yang, Chun‐Chen; Chiu, Shwu‐Jer; Chien, Wen-Chen; Chiu, Sheng-Shin

doi:10.1016/j.jpowsour.2009.10.091

Cited by 126 publications

(60 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The hydroxide conductivity of the KOH-doped QPVA nanocomposite membranes was higher than that of most alkaline anionic exchange membranes (which are of the order of 10 −2 -10 −3 S cm −1 [2,7,21,23,63]). The quaternized portion acted as an anionic-exchange membrane, and its conductivity was comparable to that of most anion-exchange membranes [18,21].…”

Section: Nanocomposite Membrane Characterizationsmentioning

confidence: 84%

“…The quaternized portion acted as an anionic-exchange membrane, and its conductivity was comparable to that of most anion-exchange membranes [18,21]. The higher ionic conductivity was due to a hopping mechanism at the anionic-exchange functional group and to the vehicular diffusion through the polymeric free volume in the QPVA matrix [17].…”

Section: Nanocomposite Membrane Characterizationsmentioning

confidence: 90%

“…Moreover, we used low catalyst loadings in the anode (2 mg cm −1 ) and cathode (1 mg cm −1 ), which provided the advantage of low-cost DAMFC manufacturing. To our best knowledge, this Pmax output is the highest value of DAMFCs recorded [7,8,[17][18][19][20][21]23,24,63,[74][75][76]. Based on the above tests, the optimal operating condition was fed with 4 M of methanol solution, cell temperature of 60 • C, and the use of the QPVA/CTAB-coated LaFeO 3 composite electrolyte.…”

Section: Direct Alkaline Methanol Fuel Cell Performancementioning

confidence: 94%

“…Incorporating organic/inorganic nanofillers (e.g., chitosan, Al 2 O 3 , SiO 2 , TiO 2 , and Fe 3 O 4 ) into a PVA-based matrix has been shown to enhance chemical stability, physicochemical, and electrochemical properties for DAMFC applications [17,[19][20][21][22]. These nanocomposite membranes deliver noteworthy advantages over traditional pure polymeric membranes due to their higher ionic conductivity, suppressed permeability, and improved power densities [23,24].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

Kumar

et al. 2017

Energies

Self Cite

View full text Add to dashboard Cite

Perovskite LaFeO 3 nanofillers (0.1%) are incorporated into a quaternized poly(vinyl alcohol) (QPVA) matrix for use as hydroxide-conducting membranes in direct alkaline methanol fuel cells (DAMFCs). The as-synthesized LaFeO 3 nanofillers are amorphous and functionalized with cetyltrimethylammonium bromide (CTAB) surfactant. The annealed LaFeO 3 nanofillers are crystalline without CTAB. The QPVA/CTAB-coated LaFeO 3 composite membrane shows a defect-free structure while the QPVA/annealed LaFeO 3 film has voids at the interfaces between the soft polymer and rigid nanofillers. The QPVA/CTAB-coated LaFeO 3 composite has lower methanol permeability and higher ionic conductivity than the pure QPVA and QPVA/annealed LaFeO 3 films. We suggest that the CTAB-coated LaFeO 3 provides three functions to the polymeric composite: increasing polymer free volume, ammonium group contributor, and plasticizer to enhance the interfacial compatibility. The composite containing CTAB-coated LaFeO 3 results in superior cell performance. A maximum power density of 272 mW cm −2 is achieved, which is among the highest power outputs reported for DAMFCs in the literature.

show abstract

Section: Nanocomposite Membrane Characterizationsmentioning

confidence: 84%

Section: Nanocomposite Membrane Characterizationsmentioning

confidence: 90%

Section: Direct Alkaline Methanol Fuel Cell Performancementioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

Kumar

et al. 2017

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…These electrochemical devices have high selectivity and ionic conductivity, acid, base and solvent resistance, excellent contact between synthetic and biological systems, pH sensitive and good mechanical properties 1,2,7 . Chitosan (poly-β(1,4)-D-glucosamine) is an abundant, naturally occurring cationic biopolymer with reactive hydroxyl and amino group and has many electrical, chemical, and biological properties [8][9][10][11] . It has been used extensively for biomedical applications like drug delivery systems, tissue engineering, separation membranes, and artificial corneas, adhesives etc.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of Ac Impedance and Dielectric Spectroscopic Properties of Conducting Chitosan-silane Crosslinked-poly (Vinyl Alcohol) Blended Films

et al. 2015

View full text Add to dashboard Cite

The films of chitosan (CS)-silane crosslinked-poly(vinyl alcohol) (PVA) with different weight % were prepared. The effect on conductivity of CS/PVA blended films due to change in the concentration of PVA and temperature was investigated by impedance spectroscopy and showed good conductance properties. The complex impedance plots revealed single semicircular arcs indicating the bulk contribution to overall electrical behavior of all synthesized samples. The ac conductivity obeyed the Jonscher's power law for all samples in the frequency range of 2 kHz to 2 MHz. The ionic conductivity of the films was increased with the increase in temperature for all synthesized samples which showed an increase in the number of effective charge carriers while it was decreased at a specific higher temperature for each film. The observed activation energy for CP4, CP8 and CP10 were 0.431, 0.610 and 0.425 eV, respectively. These properties showed that the films were promising materials to be employed for conducting properties.

show abstract

Effects of γ‐aminopropyltriethoxylsilane on morphological characteristics of hybrid nylon‐66‐based membranes before electron beam irradiation

Leo¹,

Linggawati²,

Mohammad³

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

Nylon-66 is a typical semicrystalline polymer that can be crosslinked using crosslinking agents and electron beam irradiation. Hybrid nylon-66-based membranes are more porous but denser compared to the pure nylon-66 membrane. Besides that, hybrid nylon-66 membranes exhibit higher water uptake and severe swelling in water. Si/nylon-66 membranes were prepared by adding c-aminopropyltriethoxylsilane (APTEOS). Crosslinked silica in nylon-66 membranes is confirmed with high gel content and Fourier transform infrared peaks, but XRD results showed that there is a low crystalline degree in these membranes. The thermal stability of hybrid nylon-66 membranes is also less affected by APTEOS. The crosslinking agent only improves storage modulus in hybrid nylon-66 membranes. After irradiation, it is learned that APTEOS improves separation performance of nylon-66 membranes. However, excessive APTEOS causes the ratio of effective thickness over porosity (Dx/ A k ) reduces significantly resulting a lower permeability membrane.

show abstract

Quaternized poly(vinyl alcohol)/alumina composite polymer membranes for alkaline direct methanol fuel cells

Cited by 126 publications

References 24 publications

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

Surfactant-Assisted Perovskite Nanofillers Incorporated in Quaternized Poly (Vinyl Alcohol) Composite Membrane as an Effective Hydroxide-Conducting Electrolyte

An Investigation of Ac Impedance and Dielectric Spectroscopic Properties of Conducting Chitosan-silane Crosslinked-poly (Vinyl Alcohol) Blended Films

Effects of γ‐aminopropyltriethoxylsilane on morphological characteristics of hybrid nylon‐66‐based membranes before electron beam irradiation

Contact Info

Product

Resources

About