Scientific article

Fast ion conduction in garnet-type metal borohydrides Li3K3Ce2(BH4)12 and Li3K3La2(BH4)12

Published inJournal of alloys and compounds, vol. 662, p. 388-395
Publication date2016

Complex hydrides are a family of compounds which have attracted a lot of attention in the last decade for various clean energy-related purposes, from solid state hydrogen storage to materials suitable in Li-ion batteries. We present two new garnet-type borohydride materials suitable as solid state electrolytes. Li3K3Ce2(BH4)12 and Li3K3La2(BH4)12 show unexpectedly high room temperature Liþ ionic conductivity (compared to the reported isostructural garnet oxide Li-conductor) of sigma_Li 3 x 10**7 and 6 x 10**7 S/cm with corresponding activation energies of Ea = 0.79 and Ea = 0.67 eV, respectively, which result from large bottleneck windows in the conduction path. The effect of heterovalent cation substitution is investigated as means of tailoring ionic conductivity. Doping with divalent Sr2+ and Eu2+ shows that sigma_Li can be increased by one order of magnitude in the whole temperature range measured.

  • Borohydride
  • Powder diffraction
  • Garnet
  • Solid state electrolyte
Research group
  • European Commission - Novel Complex Metal Hydrides for Efficient and Compact Storage of Renewable Energy as Hydrogen and Electricity [607040]
Citation (ISO format)
BRIGHI, Matteo et al. Fast ion conduction in garnet-type metal borohydrides Li<sub>3</sub>K<sub>3</sub>Ce<sub>2</sub>(BH<sub>4</sub>)<sub>12</sub> and Li<sub>3</sub>K<sub>3</sub>La<sub>2</sub>(BH<sub>4</sub>)<sub>12</sub>. In: Journal of alloys and compounds, 2016, vol. 662, p. 388–395. doi: 10.1016/j.jallcom.2015.11.218
Main files (1)
Article (Published version)
ISSN of the journal0925-8388

Technical informations

Creation12/21/2015 10:33:00 AM
First validation12/21/2015 10:33:00 AM
Update time03/15/2023 12:00:16 AM
Status update03/15/2023 12:00:16 AM
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