A study of the phase transitions and proton dynamics of the superprotonic conductor Cs5H3(SO4)4·0.5H2O single crystal with 1H and 133Cs nuclear magnetic resonance

Lim, Ae Ran

doi:10.1016/j.jssc.2008.01.011

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Cited by 5 publications

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“…Protonic conduction has been shown to occur in many different types of materials containing structural protons such as CsHSO 4 , CsHSeO 4 , and Cs 5 H 3 (SO 4 ) 4 , as well as in materials which do not have structural protons such as Ba 3 Ce(PO 4 ) 3 , Sr doped LaPO 4 , Eu doped SrCeO 3 , and Yb doped BaCeO 3 [1][2][3][4][5][6][7][8][9]. In the latter type, acceptor doping leads to the formation of charge compensating oxygen ion vacancies.…”

Section: Introductionmentioning

confidence: 99%

Proton conduction in acceptor doped SnP2O7

et al. 2011

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Section: Introductionmentioning

confidence: 99%

Proton conduction in acceptor doped SnP2O7

et al. 2011

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Vibrational Spectroscopic and X-Ray Single Crystal Diffraction Investigation of Tetra-n-Alkylammonium Hydrogen Selenates

et al. 2017

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On the isostructural and superprotonic Cs5H3(SO4)4·xH2O transformations: physical or chemical nature?

Ortiz

Mendoza-Estrada

Romero

2017

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For over 20 years, researchers have agreed that when pentacesium trihydrogen tetrasulfate hydrate (Cs5H3(SO4)4•xH2O) is heated through 141 °C, the observed conductivity increase corresponds to a physical transformation: a first-order superprotonic phase transition. A careful high-temperature phase behavior examination of this acid salt was performed by means of simultaneous thermogravimetric and differential scanning calorimetry, conventional and modulated differential scanning calorimetry, and impedance spectroscopy. The results present evidence that this transformation is of chemical, instead of physical nature. The conductivity increase is an exclusive consequence of a partial thermal decomposition, where liquid water (dissolving part of the surface salt) and hygroscopic cesium pyrosulfate (Cs2S2O7), as decomposition products, behave like a polymer electrolyte membrane where the proton transport mechanism includes the vehicle type, using hydronium (H3O +) as a charge carrier. Additionally, it was found that the intermediate temperature transformation (so-called isostructural phase transition) at around 87 °C is also of chemical nature.

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A study of the phase transitions and proton dynamics of the superprotonic conductor Cs5H3(SO4)4·0.5H2O single crystal with 1H and 133Cs nuclear magnetic resonance

Cited by 5 publications

References 29 publications

Proton conduction in acceptor doped SnP2O7

Proton conduction in acceptor doped SnP2O7

Vibrational Spectroscopic and X-Ray Single Crystal Diffraction Investigation of Tetra-n-Alkylammonium Hydrogen Selenates

On the isostructural and superprotonic Cs5H3(SO4)4·xH2O transformations: physical or chemical nature?

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