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Doctoral thesis
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Novel solid electrolytes based on borohydrides and higher boranes

ContributorsSadikin, Yolanda
Defense date2016-07-25
Abstract

This thesis focuses on the preparation and characterization of several new compounds based on borohydrides [BH4]- and closo-boranes [B12H12]2- with the aim of developing new materials for ambient temperature solid electrolytes. The underlying complexity and flexibility of the boron-hydrogen complex anions endows them as promising building blocks for design of superionic conductors. The dynamic reorientation of the anions can facilitate high cationic conductivity with low activation energy. The compounds were prepared mainly via solid state synthesis (mechanochemistry and annealing). X-ray powder diffraction was employed to solve and refine crystal structures, supported by thermal analysis, spectroscopic and computational methods. Impedance spectroscopy was done to establish correlations between ionic conductivity and crystal chemistry. Studies of voids and channels as possible conduction paths were done by using Voronoi-Dirichlet Polyhedra (VDP) method.

eng
Keywords
  • Borohydrides
  • Dodecahydro-closo-dodecaborates
  • Ionic conductors
  • Superionic
  • Powder diffraction
  • Solid electrolytes
  • Crystallography
Research group
Citation (ISO format)
SADIKIN, Yolanda. Novel solid electrolytes based on borohydrides and higher boranes. 2016. doi: 10.13097/archive-ouverte/unige:86520
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Technical informations

Creation07/29/2016 1:20:00 PM
First validation07/29/2016 1:20:00 PM
Update time03/15/2023 12:41:02 AM
Status update03/15/2023 12:41:01 AM
Last indexation01/29/2024 8:48:53 PM
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