Ionic conductivity in orientationally disordered phases

Уваров, Н. Ф.; Улихин, А. С.; Iskakova, A. A.; Medvedev, N. N.; Аникеенко, А. В.

doi:10.1134/s1023193511040197

Cited by 7 publications

(4 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In particular, this is due to the possibility of ion transport by the paddle wheel mechanism [3][4][5][6] (coupled cation transition and anion reorientation). Indeed, as shown previously for rubidium nitrate, the reorientation frequency of the nitrate anion correlates with the transition frequency of the rubidium cation [7][8][9]. In any case, the reorien tational motion should favor the diffusion of atoms or ions.…”

Section: Introductionsupporting

confidence: 68%

Ion conductivity of the plastic phase of the organic salt [(C4H9)4N]BF4

et al. 2015

Self Cite

View full text Add to dashboard Cite

Based on the thermal and X ray diffraction analysis, NMR spectroscopy, and ion conductivity data it was shown that the organic salt [n Bu 4 N]BF 4 has an orientationally disordered phase with a primitive cubic unit cell (space group unit cell parameter a c = 1.4886(2) nm) in the temperature range 62-161°C. The mobility of molecular fragments and anions increased during the phase transition, and the ion conductivity was relatively high, reaching ~10 -6 S/cm at 150°C.

show abstract

Section: Introductionsupporting

confidence: 68%

Ion conductivity of the plastic phase of the organic salt [(C4H9)4N]BF4

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…In these disordered phases, the [B 12 H 12 ] 2− anions were also found to undergo fast molecular reorientations within the cubic unit cell [150,153]. In addition to the cation delocalisation, the high reorientational mobility of the anions may also be contributing to the superior ionic conductivity of the disordered phase [154]. When considering conduction in the solid-state, it has been proposed that anions with high reorientational mobility move with the diffusing cation, thereby decreasing the system's resistance.…”

Section: Lithium-ion Battery Technologymentioning

confidence: 99%

Properties and Applications of Metal (M) dodecahydro-closo-dodecaborates (Mn=1,2B12H12) and Their Implications for Reversible Hydrogen Storage in the Borohydrides

Grahame

Aguey‐Zinsou

2018

Inorganics

View full text Add to dashboard Cite

Hydrogen has long been proposed as a versatile energy carrier that could facilitate a sustainable energy future. For an energy economy centred around hydrogen to function, a storage method is required that is optimised for both portable and stationary applications and is compatible with existing hydrogen technologies. Storage by chemisorption in borohydride species emerges as a promising option because of the advantages of solid-state storage and the unmatched hydrogen energy densities that borohydrides attain. One of the most nuanced challenges limiting the feasibility of borohydride hydrogen storage is the irreversibility of their hydrogen storage reactions. This irreversibility has been partially attributed to the formation of stable dodecahydro-closo-dodecaborates (M n=1,2 B 12 H 12 ) during the desorption of hydrogen. These dodecaborates have an interesting set of properties that are problematic in the context of borohydride decomposition but suggest a variety of useful applications when considered independently. In this review, dodecaborates are explored within the borohydride thermolysis system and beyond to present a holistic discussion of the most important roles of the dodecaborates in modern chemistry.

show abstract

“…Rubidium nitrate melts at 310°C (583 K). The recently discovered transition IV ↔ IV′ at 73°C (346 K) [12] is manifested as a weak distortion of the structure, which does not cause changes in the crystal symmetry class. Other transitions have long been known and are accompanied by great changes in the entropy and enthalpy [13].…”

Section: Introductionmentioning

confidence: 96%

“…In the transition to phase III the orientational disorder appears, which is indicated by the greatest changes in the enthalpy and entropy, occurring at this phase transition. This is accompanied by a dramatic increase in the conductivity [12].…”

Section: Introductionmentioning

confidence: 97%

Raman spectra and structure of (1 − x)RbNO3 + xAl2O3 systems

et al. 2015

View full text Add to dashboard Cite

the structural dynamic properties of rubidium nitrate RbNO 3 and its heterogeneous composites with nanosized powder of alumina Al 2 O 3 are studied at different temperatures, phase states, and concentrations of Al 2 O 3 nanopowder. At high concentrations (x ≥ 0.5) of the Al 2 O 3 filler an additional component with a maximum at c 1 ν ~ 1049 cm -1 is detected in the Raman spectrum of the heterogeneous system. It can be assigned to 3 NO − vibrations located in the near-surface region of Al 2 O 3 nanoparticles. Furthermore, at high concentrations (x ≥ 0.5) of the Al 2 O 3 filler spectral manifestations of phase transitions of crystalline rubidium nitrate RbNO 3 disappear. This indicates a radical change in the microstructure of the heterogeneous system in comparison with the homogeneous one.

show abstract

Ionic conductivity in orientationally disordered phases

Cited by 7 publications

References 13 publications

Ion conductivity of the plastic phase of the organic salt [(C4H9)4N]BF4

Ion conductivity of the plastic phase of the organic salt [(C4H9)4N]BF4

Properties and Applications of Metal (M) dodecahydro-closo-dodecaborates (Mn=1,2B12H12) and Their Implications for Reversible Hydrogen Storage in the Borohydrides

Raman spectra and structure of (1 − x)RbNO3 + xAl2O3 systems

Contact Info

Product

Resources

About