Ionic transport studies in Sn(1−x)KxF(2−x) type solid electrolytes

Patro, L.N.; Hariharan, K.

doi:10.1016/j.materresbull.2012.05.006

Cited by 20 publications

(9 citation statements)

References 17 publications

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“…The break in the temperaturedependent conductivity plot of SnF 2 is associated with its phase transition from α (monoclinic) to γ (tetragonal) form. 29 The ionic transport number of the tetragonal SrSnF 4 is calculated from the final equilibrium current (I e ) and total current (I t ) (Figure 6b) by the equation = t…”

Section: ■ Results and Discussionsupporting

confidence: 74%

“…The physical significances of the circuit elements given in the equivalent circuit are earlier known. 29 At each temperature, the dc conductivity value is calculated from the obtained bulk resistance (R b ) by the relation…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…(a) Temperature-dependent conductivity plots of ball-milled (cubic) and annealed (tetragonal) SrSnF 4 . The temperature-dependent conductivity data of SnF 2 , milled SnF 2 (SnF 2 -BM-10 h), Sn 0.9 K 0.1 F 1.9 , SrF 2 , milled SrF 2 (SrF 2 -BM-10 h), and Sr 0.7 Y 0.3 F 2.3 are included for comparison. (b) Polarization current vs time plot for the Ag|SrSnF 4 | Ag cell.…”

Section: Resultsmentioning

confidence: 99%

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Mechanochemical Synthesis and Fluoride Ion Conductivity Studies in SrSnF₄ Polymorphs

et al. 2023

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Investigations on SnF2-based solid electrolytes are gaining significant scientific attention because of their promising applications as solid electrolytes for all-solid-state fluoride ion batteries (FIBs) operating at room temperature. FIBs are potential alternatives for expensive Li-ion batteries with toxic and flammable liquid electrolytes. SrSnF4 belongs to the MSnF4 (M: Pb, Ba, and Sr)-type materials exhibiting a layered structure. Here, we present the structural and transport characteristics of two polymorphs of SrSnF4 using X-ray diffraction and impedance spectroscopy techniques. SrSnF4 crystallizing in a cubic fluorite structure is obtained just by mechanical milling the powder samples of SrF2 and SnF2 taken in a 1:1 ratio for 10 h, whereas annealing the milled powder at 623 K in the N2 atmosphere transforms SrSnF4 from its cubic phase to the stable tetragonal structure. The structural details of both the cubic and tetragonal SrSnF4 have been obtained by performing the Rietveld refinement. The resultant phase change after soft annealing enhances the room-temperature conductivity value from 2.05 × 10–6 S/cm for the cubic phase to 1.16 × 10–5 S/cm for the tetragonal phase. The transport number measurement by the dc polarization technique with the cell of configuration Ag/SrSnF4/Ag reveals that the conductivity is due to the ions. The frequency response of conductivity data is analyzed using the Almond–West formalism to find their hopping frequency and mobile carrier concentration factor at different temperatures. The scaling of the frequency-dependent conductivity spectra shows that the relaxation behavior of the mobile ions is temperature independent.

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Section: ■ Results and Discussionsupporting

confidence: 74%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Mechanochemical Synthesis and Fluoride Ion Conductivity Studies in SrSnF₄ Polymorphs

et al. 2023

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“…[7][8][9][10] On the other hand, the tysonite-type La 1-x Ba x F 3-x and Sm 1-x Ca x F 3-x and the uorite-type Sn 1-x K x F 2-x and Ba 1-x La x F 2+x are the materials based on the latter one. [11][12][13][14] Although various uoride ion conductors are previously reported, 15,16 further material explorations for su ciently high uoride ion conductivity are required to realize ASSFIBs.…”

Section: Introductionmentioning

confidence: 99%

Fast Fluoride Ion Conduction in Molecular Cation-Containing Compounds, NH4(Mg1-xLix)F3-x and (NH4)2(Mg1-xLix)F4-x

Motohashi¹,

Matsukawa²,

Nakamura³

et al. 2021

Preprint

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Aiming development of the fast anion conductors, we proposed a new material design using flexible molecular cation as a host cation, and demonstrated it with fluoride ion conduction in NH4(Mg1-xLix)F3-x and (NH4)2(Mg1-xLix)F4-x. Relatively high fluoride ion conductivities of 4.8×10-5 S cm-1 and 8.4×10-6 S cm-1 were achieved at 323 K in (NH4)2(Mg0.85Li0.15)F3.85 and NH4(Mg0.9Li0.1)F2.9, respectively. Our findings suggest molecular cation-containing compounds can be attractive material groups for fast anion conductors.

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“…[18], Sr 2? [19] and different anions such as O 2- [20,21] and F - [22] has been fruitfully utilized in the past few decades. Researchers observed approximately 0.3 Scm -1 conductivity in Ag and Cu halide systems at room temperature [23,24].…”

Section: Introductionmentioning

confidence: 99%

Impedance spectroscopy and conductivity studies of KCl-doped solid electrolyte

Wani

Rafiuddin

2018

J Theor Appl Phys

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(CuCl) 4-2x-(KCl) x-CdCl 2 , x = 0.0-0.4 solid electrolytes were grown via solid-state reaction procedure by suitable heat treatment. An AC impedance spectroscopy suggested that the ionic conductivity mainly arisen from grain effect. A DC electrical conductivity of 3.94 9 10-5 Scm-1 was measured for the x = 0.3 composition at 320°C. This also shows lowest activation energy in the temperature range of 293-593 K. This has been explained by that fact that at high temperatures thermal disturbances through lattice vibrations take place. In such a high-temperature region, Cu ? readily jumps and migrates at short range, but the number of mutual collisions also increases resulting in a decrease of the Cu ? mobility. The present study reveals that the change in conductivity value depends on concentration of doped ingredient as well as on various parameters in the system. Therefore, these solid electrolytes will be suitable for the development of different electrochemical applications.

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Ionic transport studies in Sn(1−x)KxF(2−x) type solid electrolytes

Cited by 20 publications

References 17 publications

Mechanochemical Synthesis and Fluoride Ion Conductivity Studies in SrSnF₄ Polymorphs

Mechanochemical Synthesis and Fluoride Ion Conductivity Studies in SrSnF₄ Polymorphs

Fast Fluoride Ion Conduction in Molecular Cation-Containing Compounds, NH4(Mg1-xLix)F3-x and (NH4)2(Mg1-xLix)F4-x

Impedance spectroscopy and conductivity studies of KCl-doped solid electrolyte

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Ionic transport studies in Sn(1−x)KxF(2−x) type solid electrolytes

Cited by 20 publications

References 17 publications

Mechanochemical Synthesis and Fluoride Ion Conductivity Studies in SrSnF4 Polymorphs

Mechanochemical Synthesis and Fluoride Ion Conductivity Studies in SrSnF4 Polymorphs

Fast Fluoride Ion Conduction in Molecular Cation-Containing Compounds, NH4(Mg1-xLix)F3-x and (NH4)2(Mg1-xLix)F4-x

Impedance spectroscopy and conductivity studies of KCl-doped solid electrolyte

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Mechanochemical Synthesis and Fluoride Ion Conductivity Studies in SrSnF₄ Polymorphs

Mechanochemical Synthesis and Fluoride Ion Conductivity Studies in SrSnF₄ Polymorphs