卤化和添加 SiO2 对 LiBH4 的锂离子传导性的综合影响

IF 3.1 4区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Valerio Gulino, Laura M. de Kort, P. Ngene, Petra de Jongh, Marcello Baricco
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引用次数: 0

摘要

本文研究了阴离子置换(Br- 和 I-)和 SiO2 添加对 LiBH4 中锂离子电导率的综合影响。通过球磨制备了不同成分的六方固溶体 h-Li(BH4)1-α(X)α(X = Br、I),并对其进行了全面表征。然后将每个体系中导电性最强的成分与不同量的二氧化硅纳米颗粒混合。在 LiBH4-LiBr/SiO2 和 LiBH4-LiI/SiO2 体系中,如果添加的复合氢化物的量完全填满了添加的二氧化硅的原始孔隙,那么锂离子的导电性就会比单独的 h-Li(BH4)1-α(X)α 固溶体进一步提高。由于 h-Li(BH4)1-α(X)α具有比 LiBH4 更高的导电性,因此在与二氧化硅的复合材料中使用 LiBH4-LiX 而不是 LiBH4 能够为锂离子开发出最佳的导电途径。事实上,含有 h-Li(BH4)1-α(X)α的二氧化硅的锂电导率要高于 LiBH4-SiO2 单独达到的最大值。因此,这项工作证明了卤化与界面工程相结合的协同效应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Combined Effect of Halogenation and SiO2 Addition on the Li-Ion Conductivity of LiBH4
In this work, the combined effects of anion substitution (with Br− and I−) and SiO2 addition on the Li-ion conductivity in LiBH4 have been investigated. Hexagonal solid solutions with different compositions, h-Li(BH4)1−α(X)α (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 SiO2 nanoparticles. If the amount of added complex hydride fully fills the original pore volume of the added silica, in both LiBH4-LiBr/SiO2 and LiBH4-LiI/SiO2 systems, the Li-ion conductivity was further increased compared to the h-Li(BH4)1−α(X)α solid solutions alone. The use of LiBH4-LiX instead of LiBH4 in composites with SiO2 enabled the development of an optimal conductive pathway for the Li ions, since the h-Li(BH4)1−α(X)α possesses a higher conductivity than LiBH4. In fact, the Li conductivity of the silica containing h-Li(BH4)1−α(X)α is higher than the maximum reached in LiBH4-SiO2 alone. Therefore, a synergetic effect of combining halogenation and interface engineering is demonstrated in this work.
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来源期刊
Inorganics
Inorganics Chemistry-Inorganic Chemistry
CiteScore
2.80
自引率
10.30%
发文量
193
审稿时长
6 weeks
期刊介绍: Inorganics is an open access journal that covers all aspects of inorganic chemistry research. Topics include but are not limited to: synthesis and characterization of inorganic compounds, complexes and materials structure and bonding in inorganic molecular and solid state compounds spectroscopic, magnetic, physical and chemical properties of inorganic compounds chemical reactivity, physical properties and applications of inorganic compounds and materials mechanisms of inorganic reactions organometallic compounds inorganic cluster chemistry heterogenous and homogeneous catalytic reactions promoted by inorganic compounds thermodynamics and kinetics of significant new and known inorganic compounds supramolecular systems and coordination polymers bio-inorganic chemistry and applications of inorganic compounds in biological systems and medicine environmental and sustainable energy applications of inorganic compounds and materials MD
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