Combined Effect of Halogenation and SiO<sub>2</sub> Addition on the Li-Ion Conductivity of LiBH<sub>4</sub>
In this work, the combined effects of anion substitution (with Br<sup>−</sup> and I<sup>−</sup>) and SiO<sub>2</sub> addition on the Li-ion conductivity in LiBH<sub>4</sub> have been investigated. Hexagonal solid solutions with different compositions,...
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MDPI AG
2023-11-01
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| Series: | Inorganics |
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| Online Access: | https://www.mdpi.com/2304-6740/11/12/459 |
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| author | Valerio Gulino Laura de Kort Peter Ngene Petra de Jongh Marcello Baricco |
| author_facet | Valerio Gulino Laura de Kort Peter Ngene Petra de Jongh Marcello Baricco |
| author_sort | Valerio Gulino |
| collection | DOAJ |
| description | In this work, the combined effects of anion substitution (with Br<sup>−</sup> and I<sup>−</sup>) and SiO<sub>2</sub> addition on the Li-ion conductivity in LiBH<sub>4</sub> have been investigated. Hexagonal solid solutions with different compositions, <i>h</i>-Li(BH<sub>4</sub>)<sub>1−α</sub>(X)<sub>α</sub> (X = Br, I), were prepared by ball milling and fully characterized. The most conductive composition for each system was then mixed with different amounts of SiO<sub>2</sub> nanoparticles. If the amount of added complex hydride fully fills the original pore volume of the added silica, in both LiBH<sub>4</sub>-LiBr/SiO<sub>2</sub> and LiBH<sub>4</sub>-LiI/SiO<sub>2</sub> systems, the Li-ion conductivity was further increased compared to the <i>h</i>-Li(BH<sub>4</sub>)<sub>1−α</sub>(X)<sub>α</sub> solid solutions alone. The use of LiBH<sub>4</sub>-LiX instead of LiBH<sub>4</sub> in composites with SiO<sub>2</sub> enabled the development of an optimal conductive pathway for the Li ions, since the <i>h</i>-Li(BH<sub>4</sub>)<sub>1−α</sub>(X)<sub>α</sub> possesses a higher conductivity than LiBH<sub>4</sub>. In fact, the Li conductivity of the silica containing <i>h</i>-Li(BH<sub>4</sub>)<sub>1−α</sub>(X)<sub>α</sub> is higher than the maximum reached in LiBH<sub>4</sub>-SiO<sub>2</sub> alone. Therefore, a synergetic effect of combining halogenation and interface engineering is demonstrated in this work. |
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| issn | 2304-6740 |
| language | English |
| last_indexed | 2024-03-08T20:39:32Z |
| publishDate | 2023-11-01 |
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| spelling | doaj.art-1857cda95d70496da6d4e1a93a87c5b62023-12-22T14:16:04ZengMDPI AGInorganics2304-67402023-11-01111245910.3390/inorganics11120459Combined Effect of Halogenation and SiO<sub>2</sub> Addition on the Li-Ion Conductivity of LiBH<sub>4</sub>Valerio Gulino0Laura de Kort1Peter Ngene2Petra de Jongh3Marcello Baricco4Department of Chemistry, NIS-INSTM, University of Turin, Via Pietro Giuria 7, 10125 Torino, ItalyMaterials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The NetherlandsMaterials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The NetherlandsMaterials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The NetherlandsDepartment of Chemistry, NIS-INSTM, University of Turin, Via Pietro Giuria 7, 10125 Torino, ItalyIn this work, the combined effects of anion substitution (with Br<sup>−</sup> and I<sup>−</sup>) and SiO<sub>2</sub> addition on the Li-ion conductivity in LiBH<sub>4</sub> have been investigated. Hexagonal solid solutions with different compositions, <i>h</i>-Li(BH<sub>4</sub>)<sub>1−α</sub>(X)<sub>α</sub> (X = Br, I), were prepared by ball milling and fully characterized. The most conductive composition for each system was then mixed with different amounts of SiO<sub>2</sub> nanoparticles. If the amount of added complex hydride fully fills the original pore volume of the added silica, in both LiBH<sub>4</sub>-LiBr/SiO<sub>2</sub> and LiBH<sub>4</sub>-LiI/SiO<sub>2</sub> systems, the Li-ion conductivity was further increased compared to the <i>h</i>-Li(BH<sub>4</sub>)<sub>1−α</sub>(X)<sub>α</sub> solid solutions alone. The use of LiBH<sub>4</sub>-LiX instead of LiBH<sub>4</sub> in composites with SiO<sub>2</sub> enabled the development of an optimal conductive pathway for the Li ions, since the <i>h</i>-Li(BH<sub>4</sub>)<sub>1−α</sub>(X)<sub>α</sub> possesses a higher conductivity than LiBH<sub>4</sub>. In fact, the Li conductivity of the silica containing <i>h</i>-Li(BH<sub>4</sub>)<sub>1−α</sub>(X)<sub>α</sub> is higher than the maximum reached in LiBH<sub>4</sub>-SiO<sub>2</sub> alone. Therefore, a synergetic effect of combining halogenation and interface engineering is demonstrated in this work.https://www.mdpi.com/2304-6740/11/12/459complex hydridessolid-state electrolytesLiBH<sub>4</sub> |
| spellingShingle | Valerio Gulino Laura de Kort Peter Ngene Petra de Jongh Marcello Baricco Combined Effect of Halogenation and SiO<sub>2</sub> Addition on the Li-Ion Conductivity of LiBH<sub>4</sub> Inorganics complex hydrides solid-state electrolytes LiBH<sub>4</sub> |
| title | Combined Effect of Halogenation and SiO<sub>2</sub> Addition on the Li-Ion Conductivity of LiBH<sub>4</sub> |
| title_full | Combined Effect of Halogenation and SiO<sub>2</sub> Addition on the Li-Ion Conductivity of LiBH<sub>4</sub> |
| title_fullStr | Combined Effect of Halogenation and SiO<sub>2</sub> Addition on the Li-Ion Conductivity of LiBH<sub>4</sub> |
| title_full_unstemmed | Combined Effect of Halogenation and SiO<sub>2</sub> Addition on the Li-Ion Conductivity of LiBH<sub>4</sub> |
| title_short | Combined Effect of Halogenation and SiO<sub>2</sub> Addition on the Li-Ion Conductivity of LiBH<sub>4</sub> |
| title_sort | combined effect of halogenation and sio sub 2 sub addition on the li ion conductivity of libh sub 4 sub |
| topic | complex hydrides solid-state electrolytes LiBH<sub>4</sub> |
| url | https://www.mdpi.com/2304-6740/11/12/459 |
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