Fast fluoride ion conducting materials in solid state ionics: An overview

Patro, L.N.; Hariharan, K.

doi:10.1016/j.ssi.2013.03.009

Cited by 111 publications

(97 citation statements)

References 123 publications

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“…AgF -with its predominant silver ion conductivity -turns out to exhibit quite high conductivity of 3 Â 10 À2 mS cm À1 at room temperature. This value is actually two orders of magnitude short of the ''superionic limit'' of 1 mS cm À1 but still comparable to the ionic conductivity of BaSnF 4 or KSn 2 F 5 at room temperature [26] (these compounds are known as ones of the best fluoride ion conductors). This result suggests that pristine AgF could indeed be used as solid ionic conductor in the silver fluoride batteries, for example: Ag (s) jAgF (s) jAgF 2(s) j(Pt).…”

Section: Ionic Conductivity Of the Ag(fcl) Phases As Well As Agf Andmentioning

confidence: 75%

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New Ag(F1−Cl ) phases for energy storage applications

Adamczyk

Połczyński

Mika

et al. 2015

Journal of Fluorine Chemistry

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Section: Ionic Conductivity Of the Ag(fcl) Phases As Well As Agf Andmentioning

confidence: 75%

“…(EIS) is often used to determine conductivity of fluoride-ionrich solids and solid electrolytes [25][26][27][28]. The AC impedance measurements were carried out by using a Solartron 1260 Frequency Response Analyzer and if needed a 1296A Dielectric Interface System.…”

Section: Electric Impedance Spectroscopymentioning

confidence: 99%

New Ag(F1−Cl ) phases for energy storage applications

Adamczyk

Połczyński

Mika

et al. 2015

Journal of Fluorine Chemistry

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“…Joint milling of BaF 2 and MgF 2 or SnF 2 leads to the formation of the ternary compounds BaSnF 4 and BaMgF 4 [18,19,55]. While the first shows a layered structure, BaMgF 4 crystallizes in the orthorhombic Cmc2 1 structure and consists of strands of corner-sharing MgF 6 -octahedra that are separated by the Ba-ions [56].…”

Section: Channel-structured and Layered Ternary Fluorides: Bamgf 4 Anmentioning

confidence: 99%

“…The conductivity of the tetragonal modification of BaSnF 4 is much higher than that of the "cubic" form (see Figure 15c). BaSnF 4 is, besides PbSnF 4 [55], known to be one of the fastest F anion conductors (Figure 16) [55,[63][64][65]. Similar to BaMgF 4 , it shows anisotropic conduction characteristics.…”

Section: F Mas Nmrmentioning

confidence: 99%

Structure and ion dynamics of mechanosynthesized oxides and fluorides

Wilkening

Düvel

Preishuber-Pflügl

et al. 2016

Zeitschrift Für Kristallographie - Crystalline Materials

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Abstract:In many cases, limitations in conventional synthesis routes hamper the accessibility to materials with properties that have been predicted by theory. For instance, metastable compounds with local non-equilibrium structures can hardly be accessed by solid-state preparation techniques often requiring high synthesis temperatures. Also other ways of preparation lead to the thermodynamically stable rather than metastable products. Fortunately, such hurdles can be overcome by mechanochemical synthesis. Mechanical treatment of two or three starting materials in high-energy ball mills enables the synthesis of not only new, metastable compounds but also of nanocrystalline materials with unusual or enhanced properties such as ion transport. In this short review we report about local structures and ion transport of oxides and fluorides mechanochemically prepared by high-energy ball-milling.

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“…However, considering the relatively poor conductivity of solid fluoride electrolytes [8][9][10][11][12][13], it is required to evaluate solid-state FIBs at higher temperatures, typically 150 °C. Indeed, performing electrochemical testing at 150 °C decreases the cell internal resistance and enables the use of higher current densities (10 µA/cm² [7,14]).…”

mentioning

confidence: 99%

Modified coin cells to evaluate the electrochemical properties of solid-state fluoride-ion batteries at 150 °C

Grenier

Gutierrez

Groult

et al. 2016

Journal of Fluorine Chemistry

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. Modified coin cells to evaluate the electrochemical properties of solid-state fluoride-ion batteries at 150°C. Journal of Fluorine Chemistry, Elsevier, 2016, 191, pp.23 -28. 10 AbstractIn the scope of developing new chemistries for electrochemical energy systems, rechargeable solid-state fluoride-ion batteries are attractive devices owing to their high theoretical energy density. State of the art of fluoride ion conductors require the use of high temperature electrochemical cells to overcome the low ionic conductivity of the electrolyte at room temperature. In this work, we modify a coin cell to evaluate the electrochemical properties of fluoride-ion batteries at elevated temperature, over long periods of time and outside a glovebox.The coin cell is covered by a high-temperature epoxy resin that enables efficient sealing and therefore protection against air atmosphere at 150 °C. The suitability of the setup is confirmed by electrochemical investigation performed on a symmetrical cell assembled with composite electrodes made of Bi and BiF3. Notably, a reversible capacity of around 190 mAh/g after 3 cycles is reached with the modified coin cell setup.2

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Fast fluoride ion conducting materials in solid state ionics: An overview

Cited by 111 publications

References 123 publications

New Ag(F1−Cl ) phases for energy storage applications

New Ag(F1−Cl ) phases for energy storage applications

Structure and ion dynamics of mechanosynthesized oxides and fluorides

Modified coin cells to evaluate the electrochemical properties of solid-state fluoride-ion batteries at 150 °C

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