

Other version: http://linkinghub.elsevier.com/retrieve/pii/S0925838815317746
![]() |
Fast ion conduction in garnet-type metal borohydrides Li3K3Ce2(BH4)12 and Li3K3La2(BH4)12 |
|
Authors | ||
Published in | Journal of alloys and compounds. 2016, vol. 662, p. 388-395 | |
Abstract | 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. | |
Keywords | Borohydride — Powder diffraction — Garnet — Solid state electrolyte | |
Identifiers | ||
Full text |
![]() ![]() Other version: http://linkinghub.elsevier.com/retrieve/pii/S0925838815317746 |
|
Structures | ||
Research group | Groupe Cerny | |
Project | European Commission: ECOSTORE | |
Citation (ISO format) | BRIGHI, Matteo et al. Fast ion conduction in garnet-type metal borohydrides Li3K3Ce2(BH4)12 and Li3K3La2(BH4)12. In: Journal of alloys and compounds, 2016, vol. 662, p. 388-395. doi: 10.1016/j.jallcom.2015.11.218 https://archive-ouverte.unige.ch/unige:78892 |