Ion mobility and transport in β-PbF2 doped with alkaline-earth fluorides

Kavun, V. Ya.; Slobodyuk, A. B.; Tararako, E. A.; Гончарук, В. К.; Уваров, Н. Ф.; Сергиенко, В. И.

doi:10.1134/s002016850703017x

Cited by 9 publications

(2 citation statements)

References 23 publications

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“…Similar results have been found for the superionic conductor (NH 4 ) 2 ZrF 6 , where the activation energies 0.85− 2.81 eV were found between 57 and 147 °C and ion conductivities were between 2.7 × 10 −5 and 1.5 × 10 −2 S/cm. 25 The activation energies for ion conductivity are in both cases much larger than the activation energy for rotations of boron cages. This indicates that ion conductivity cannot be explained solely by the rotation-assisted jumps of NH 4 units, something that is often found in proton conductors.…”

Section: ■ Introductionmentioning

confidence: 96%

Reorientational Motions and Ionic Conductivity in (NH₄)₂B₁₀H₁₀ and (NH₄)₂B₁₂H₁₂

et al. 2018

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We investigated molecular dynamics in two ammonium borane systems from the group of promising ion conductors. The investigation was performed by means of 1 H and 11 B NMR spectroscopy and spin−lattice relaxation techniques. We identified two reorientational processes, the rotations of NH 4 units that are present already at low temperatures and rotations of large boron cages, B 10 H 10 or B 12 H 12 , which are thermally activated and become prominent above 250 K. Activation energies for these processes were determined. In addition, solid-state ion conductivity measurements were conducted to determine poor NH 4 + conductivity of both systems.

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Section: ■ Introductionmentioning

confidence: 96%

Reorientational Motions and Ionic Conductivity in (NH₄)₂B₁₀H₁₀ and (NH₄)₂B₁₂H₁₂

et al. 2018

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“…To obtain high capacities during both charging and discharging, high ionic and electronic conductivities are required for the active material. The PbF2-based compounds exhibit fluoride ion conductivity [18][19][20][21]; therefore, PbF2 was selected as an active material for the fluoride shuttle battery (FSB). It has been reported that the high adhesion state with carbon improved the charge and discharge capacities of metal fluorides for the active materials of LIBs due to the increased electronic conductivity [22][23][24][25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical properties of lead fluoride electrode in fluoride shuttle battery

Konishi

Minato

Abe

et al. 2018

Journal of Electroanalytical Chemistry

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Recently, the reversible charge-discharge reaction of BiF3 electrode for fluoride shuttle battery (FSB) that can be used as a promising candidate for next-generation battery are observed using a liquid-based electrolyte. In this study, we investigate the electrochemical performance of PbF2 as an active material for the FSB. To increase the electronic conductivity, the PbF2 was mixed with carbon, and the composite material between PbF2 and carbon, PbF2/C, is formed. High charge and discharge capacities are obtained for PbF2/C during the first cycle. Although the charge and discharge capacities gradually decreased, the charge-discharge reactions occurred in the second and third cycles. To confirm the progress of the charge-discharge reactions, the crystal structure change of the active material during charging and discharging in the first and second cycles is evaluated using X-ray diffraction (XRD). From the XRD results, the formation of Pb and PbF2 during discharging and charging can be confirmed, indicating that the discharge (PbF2 + 2e- Pb + 2F-) and charge (Pb + 2F- PbF2 + 2e-) reactions progress in both the first and second cycles.

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