The influence of Cs2HPO4·H2O impurity on the proton conductivity and thermal properties of CsH2PO4

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The influence of Cs₂HPO₄·H₂O impurity on the proton conductivity and thermal properties of CsH₂PO₄. / Ponomareva, Valentina G.; Bagryantseva, Irina N.

In: Solid State Ionics, Vol. 329, 01.01.2019, p. 90-94.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{f4ad5d8740a341ab88a999668a4ea75b,

title = "The influence of Cs2HPO4·H2O impurity on the proton conductivity and thermal properties of CsH2PO4",

abstract = "The electrotransport, structural and thermodynamic properties of CsH2PO4 with small amount of Cs2HPO4·2H2O (mole fraction, x = 0.01–0.1) has been investigated by the impedance, IR spectroscopy, X-ray diffraction and differential scanning calorimetric methods. The addition of Cs2HPO4·2H2O up to mole fraction x ≤ 0.03 was shown to increase markedly the low-temperature conductivity and change the thermodynamic characteristics of cesium dihydrogen phosphate. The low-temperature conductivity enhances up to σ150°C ~2 · 10−3 S·cm−1 for x = 0.1 and the activation energy of conductivity decreases to Ea = 0.56 eV. The superionic phase transition becomes more diffusive and almost disappears at x = 0.1. The high-temperature conductivity doesn't change significantly at the doping of CsH2PO4 up to x = 0.1. While the small deviation of proton content in CsH2PO4 shows a weak effect for XRD and IR spectroscopy. According to X-ray diffraction patterns the Cs1+xH2−xPO4 solid solutions were not observed and the formation of (1-2x)CsH2PO4-xCs3(H1.5PO4)2 composites took place. The effect of the deficiency of protons on the conductivity of CsH2PO4 in the low humidity conditions was discovered firstly and is of scientific and practice importance.",

keywords = "Acid salt, Cesium dihydrogen phosphate, Cesium hydrogen phosphate, Proton conductivity, PHASE, CRYSTAL-STRUCTURE, FUEL-CELLS, CESIUM DIHYDROGEN PHOSPHATE, HIGH-TEMPERATURE BEHAVIOR",

author = "Ponomareva, {Valentina G.} and Bagryantseva, {Irina N.}",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2019",

month = jan,

day = "1",

doi = "10.1016/j.ssi.2018.11.021",

language = "English",

volume = "329",

pages = "90--94",

journal = "Solid State Ionics",

issn = "0167-2738",

publisher = "Elsevier Science B.V.",

}

RIS

TY - JOUR

T1 - The influence of Cs2HPO4·H2O impurity on the proton conductivity and thermal properties of CsH2PO4

AU - Ponomareva, Valentina G.

AU - Bagryantseva, Irina N.

PY - 2019/1/1

Y1 - 2019/1/1

N2 - The electrotransport, structural and thermodynamic properties of CsH2PO4 with small amount of Cs2HPO4·2H2O (mole fraction, x = 0.01–0.1) has been investigated by the impedance, IR spectroscopy, X-ray diffraction and differential scanning calorimetric methods. The addition of Cs2HPO4·2H2O up to mole fraction x ≤ 0.03 was shown to increase markedly the low-temperature conductivity and change the thermodynamic characteristics of cesium dihydrogen phosphate. The low-temperature conductivity enhances up to σ150°C ~2 · 10−3 S·cm−1 for x = 0.1 and the activation energy of conductivity decreases to Ea = 0.56 eV. The superionic phase transition becomes more diffusive and almost disappears at x = 0.1. The high-temperature conductivity doesn't change significantly at the doping of CsH2PO4 up to x = 0.1. While the small deviation of proton content in CsH2PO4 shows a weak effect for XRD and IR spectroscopy. According to X-ray diffraction patterns the Cs1+xH2−xPO4 solid solutions were not observed and the formation of (1-2x)CsH2PO4-xCs3(H1.5PO4)2 composites took place. The effect of the deficiency of protons on the conductivity of CsH2PO4 in the low humidity conditions was discovered firstly and is of scientific and practice importance.

AB - The electrotransport, structural and thermodynamic properties of CsH2PO4 with small amount of Cs2HPO4·2H2O (mole fraction, x = 0.01–0.1) has been investigated by the impedance, IR spectroscopy, X-ray diffraction and differential scanning calorimetric methods. The addition of Cs2HPO4·2H2O up to mole fraction x ≤ 0.03 was shown to increase markedly the low-temperature conductivity and change the thermodynamic characteristics of cesium dihydrogen phosphate. The low-temperature conductivity enhances up to σ150°C ~2 · 10−3 S·cm−1 for x = 0.1 and the activation energy of conductivity decreases to Ea = 0.56 eV. The superionic phase transition becomes more diffusive and almost disappears at x = 0.1. The high-temperature conductivity doesn't change significantly at the doping of CsH2PO4 up to x = 0.1. While the small deviation of proton content in CsH2PO4 shows a weak effect for XRD and IR spectroscopy. According to X-ray diffraction patterns the Cs1+xH2−xPO4 solid solutions were not observed and the formation of (1-2x)CsH2PO4-xCs3(H1.5PO4)2 composites took place. The effect of the deficiency of protons on the conductivity of CsH2PO4 in the low humidity conditions was discovered firstly and is of scientific and practice importance.

KW - Acid salt

KW - Cesium dihydrogen phosphate

KW - Cesium hydrogen phosphate

KW - Proton conductivity

KW - PHASE

KW - CRYSTAL-STRUCTURE

KW - FUEL-CELLS

KW - CESIUM DIHYDROGEN PHOSPHATE

KW - HIGH-TEMPERATURE BEHAVIOR

UR - http://www.scopus.com/inward/record.url?scp=85057867982&partnerID=8YFLogxK

U2 - 10.1016/j.ssi.2018.11.021

DO - 10.1016/j.ssi.2018.11.021

M3 - Article

AN - SCOPUS:85057867982

VL - 329

SP - 90

EP - 94

JO - Solid State Ionics

JF - Solid State Ionics

SN - 0167-2738

ER -

ID: 17827769