On the low- to high proton-conducting transformation of a CsHSO4–CsH2PO4 solid solution and its parents

Ortiz, E.; Piñeres, I.; León, Carlos

doi:10.1007/s10973-016-5474-y

Cited by 10 publications

(3 citation statements)

References 45 publications

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“…The high-temperature conductivity is increased several orders of the magnitude at the transition temperature from 223 °C to 233 °C, the ionic conductivity increases from 8.5 × 10 -6 S cm −1 to 1.8 × 10 -2 S cm −1 [8] and CDP with 80 wt% represent a high ionic conductivity of 1.1 × 10 -2 S cm −1 at 259 °C [9]. At the transition temperature CDP changed from the monoclinic phase to the tetragonal (cubic) phase, this changed increase ionic conductivity followed by the Grotthuss mechanism [10]. Above 230 °C CDP chemical transformation decomposed as…”

Section: Introductionmentioning

confidence: 94%

Structural, thermal and electrical properties of composites electrolytes (1−x) CsH2PO4/x ZrO2 (0 ≤ x ≤ 0.4) for fuel cell with advanced electrode

et al. 2021

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Composites proton conducting material based on cesium dihydrogen phosphate (CDP) doped with zirconium oxide (1−x) CsH2PO4/x ZrO2 were synthesized with different concentration having in the range such as x = 0.1, 0.2, 0.3 and 0.4 by ball milling method. The prepared solid acid composites were dried at 150 °C for 6 h. Structural and thermal characterization of solid acid composite proton electrolytes were carried out by X-ray diffractometer, Fourier transform infrared spectroscopy, and Raman spectroscopy respectively. Phase transition of the prepared materials was carried out by using differential scanning calorimetry and conductivity was measured by LC Impedance meter in the range 1 Hz to 400 kHz. The ionic conductivity of ZrO2 doped CsH2PO4 (CDP) was increased up to 1.3 × 10–2 S cm−1 at the 280 °C under environment atmospheric humidification which showed high stability as compared to pure CsH2PO4 (CDP). This obtaining result would be useful for establishing and design the next generation fuel cell.

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Section: Introductionmentioning

confidence: 94%

Structural, thermal and electrical properties of composites electrolytes (1−x) CsH2PO4/x ZrO2 (0 ≤ x ≤ 0.4) for fuel cell with advanced electrode

et al. 2021

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“…Whether the "superionic conduction state" in CDP really exists is still questioned by some reseachers: Could the high conductivity above ∼230 °C be a consequence of partial dehydration at the crystal surface? [51]- [52], [62]. It has been claimed that CDP does not undergo the superprotonic phase transition; instead a dynamically disordered hydrogen bond network might improve the protonic conduction, or a loss of water from the structure might raise the conductivity.…”

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confidence: 99%

Vapor pressure and specific electrical conductivity in the solid and molten H2O-CsH2PO4-CsPO3 system—a novel electrolyte for water electrolysis at ~ 225–400 °C

Nikiforov

Berg

Bjerrum

2018

Ionics

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“…The interest in superprotonic crystals as materials for practical applications makes the question of the stability of superprotonic phases over long periods of time, including in humid atmospheres, oxygen and hydrogen, and for a number of compounds the question of the presence of superprotonic phases is relevant (see e.g. Lee, 1996;Merle et al, 2003;Otomo et al, 2003;Baranov et al, 2009;Ortiz et al, 2016). The formation of an uncontrolled product and change of properties relative to the initial state is generally undesirable even on the scale of surface layers.…”

Section: Introductionmentioning

confidence: 99%

Features of the crystal structure and surface of superprotonic conductor caesium hydrogen sulfate phosphate

Makarova,

Isakova,

Kalyukanov

et al. 2024

Acta Crystallogr Sect B

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The crystal structure of superprotonic conductor caesium hydrogen sulfate phosphate [Cs4(HSO4)3(H2PO4)] have been analyzed using neutron diffraction methods. Additionally, its structure and surface layers have been investigated using atomic force microscopy. From the diffraction data obtained, Fourier syntheses of neutron scattering densities were calculated, and the localization of hydrogen atoms and the parameters of three types of hydrogen bonds in the crystal structure were accurately determined. Correlation of surface characteristics of samples obtained by atomic force microscopy with their crystal structure is shown.

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On the low- to high proton-conducting transformation of a CsHSO4–CsH2PO4 solid solution and its parents

Cited by 10 publications

References 45 publications

Structural, thermal and electrical properties of composites electrolytes (1−x) CsH2PO4/x ZrO2 (0 ≤ x ≤ 0.4) for fuel cell with advanced electrode

Structural, thermal and electrical properties of composites electrolytes (1−x) CsH2PO4/x ZrO2 (0 ≤ x ≤ 0.4) for fuel cell with advanced electrode

Vapor pressure and specific electrical conductivity in the solid and molten H2O-CsH2PO4-CsPO3 system—a novel electrolyte for water electrolysis at ~ 225–400 °C

Features of the crystal structure and surface of superprotonic conductor caesium hydrogen sulfate phosphate

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