Phase transition and proton transport characteristics in CsH2PO4/SiO2 composites

Otomo, Junichiro; Ishigooka, Takashi; Kitano, Tomoyuki; Takahashi, Hiroshi; Nagamoto, Hidetoshi

doi:10.1016/j.electacta.2008.06.018

Cited by 33 publications

(28 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[11][12][13][14][15][16][17][18][19][20][21][22][23][24] The phase transition of this material at ca. 230 • C from monoclinic (low-temperature phase) to cubic (high-temperature phase) brings about a drastic increase in its ionic conductivity, exceeding 10 mS cm −1 .…”

mentioning

confidence: 98%

CsH₂PO₄/Polyvinylidene Fluoride Composite Electrolytes for Intermediate Temperature Fuel Cells

Qing

Kikuchi

Takagaki

et al. 2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

In this study CsH 2 PO 4 /polyvinylidene fluoride (PVDF) composite electrolytes were prepared by a slurry casting method and their application in intermediate temperature fuel cells (ITFCs) was investigated. The composite electrolytes consisted of a physical dispersion of CsH 2 PO 4 particles in the PVDF polymer network and were thin and flexible. The crystalline structure and thermal behavior of CsH 2 PO 4 were not influenced by the PVDF. The composite electrolyte with 70 wt% CsH 2 PO 4 showed a high conductivity of 10 mS cm −1 at 270 • C under 30% H 2 O/Ar atmosphere as well as a tensile strength of 7 MPa at room temperature. In addition, the composite electrolytes had area specific resistances of 0.99 and 0.72 cm 2 , for corresponding thicknesses of 101 and 67 μm, which are low values. The composite electrolyte with 70 wt% CsH 2 PO 4 showed stable conductivity at 259 • C under 30% H 2 O/Ar atmosphere for 48 h. A fuel cell assembled with this electrolyte exhibited an open circuit voltage of 0.92 V and a peak power density of 86 mW cm −2 , making the composite electrolyte a candidate electrolyte for ITFCs.

show abstract

mentioning

confidence: 98%

CsH₂PO₄/Polyvinylidene Fluoride Composite Electrolytes for Intermediate Temperature Fuel Cells

Qing

Kikuchi

Takagaki

et al. 2014

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…Recently, it has been reported that the proton conductivity of CDP is increased by introducing silica nanoparticles, especially at temperatures below the phase-transition temperature under hydrous condition [7,14,15]. However, high proton conductivity of CDP under anhydrous condition has not been reported to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 70%

Mechanochemically synthesized CsH₂PO₄–H₃PW₁₂O₄₀composites as proton-conducting electrolytes for fuel cell systems in a dry atmosphere

Insani

Nguyen

et al. 2011

Science and Technology of Advanced Materials

View full text Add to dashboard Cite

Cesium dihydrogen phosphate (CsH 2 PO 4 , CDP) and dodecaphosphotungstic acid (H 3 PW 12 O 40 ·nH 2 O, WPA·nH 2 O) were mechanochemically milled to synthesize CDP-WPA composites. The ionic conductivities of these composites were measured by an ac impedance method under anhydrous conditions. Despite the synthesis temperatures being much lower than the dehydration and phase-transition temperatures of CDP under anhydrous conditions, the ionic conductivities of the studied composites increased significantly. The highest ionic conductivity of 6.58 × 10 −4 Scm −1 was achieved for the 95CDP·5WPA composite electrolyte at 170• C under anhydrous conditions. The ionic conduction was probably induced in the percolated interfacial phase between CDP and WPA. The phenomenon of high ionic conduction differs for the CDP-WPA composite and pure CDP or pure WPA under anhydrous conditions. The newly developed hydrogen interaction between CDP and WPA supports anhydrous proton conduction in the composites.

show abstract

“…LiI, AgI, AgCl, CdI 2 , TlI, CsHSO 4 , CsH 2 PO 4 and oxide insulators like SiO 2 , Al 2 O 3 , ZrO 2 , Fe 2 O 3 , MgO, TiO 2 etc. [7][8][9][10][11][12][13][14][15][16][17][18][19]. This method is recognized as an easier and more efficient because of not only the enhanced room temperature ionic conductivity, but also it boosts up the thermal and mechanical stability of the material.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization, electrical and dielectric properties of (1−x) (PbI2–Ag2CrO4)–xTiO2 composite solid electrolytes

Iqbal

Rafi-Ud-Din

2015

Ceramics International

View full text Add to dashboard Cite

Phase transition and proton transport characteristics in CsH2PO4/SiO2 composites

Cited by 33 publications

References 44 publications

CsH₂PO₄/Polyvinylidene Fluoride Composite Electrolytes for Intermediate Temperature Fuel Cells

CsH₂PO₄/Polyvinylidene Fluoride Composite Electrolytes for Intermediate Temperature Fuel Cells

Mechanochemically synthesized CsH₂PO₄–H₃PW₁₂O₄₀composites as proton-conducting electrolytes for fuel cell systems in a dry atmosphere

Preparation, characterization, electrical and dielectric properties of (1−x) (PbI2–Ag2CrO4)–xTiO2 composite solid electrolytes

Contact Info

Product

Resources

About

Phase transition and proton transport characteristics in CsH2PO4/SiO2 composites

Cited by 33 publications

References 44 publications

CsH2PO4/Polyvinylidene Fluoride Composite Electrolytes for Intermediate Temperature Fuel Cells

CsH2PO4/Polyvinylidene Fluoride Composite Electrolytes for Intermediate Temperature Fuel Cells

Mechanochemically synthesized CsH2PO4–H3PW12O40composites as proton-conducting electrolytes for fuel cell systems in a dry atmosphere

Preparation, characterization, electrical and dielectric properties of (1−x) (PbI2–Ag2CrO4)–xTiO2 composite solid electrolytes

Contact Info

Product

Resources

About

CsH₂PO₄/Polyvinylidene Fluoride Composite Electrolytes for Intermediate Temperature Fuel Cells

CsH₂PO₄/Polyvinylidene Fluoride Composite Electrolytes for Intermediate Temperature Fuel Cells

Mechanochemically synthesized CsH₂PO₄–H₃PW₁₂O₄₀composites as proton-conducting electrolytes for fuel cell systems in a dry atmosphere