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

Brighi, Matteo; Schouwink, Pascal; Sadikin, Yolanda; Černý, Radovan

doi:10.1016/j.jallcom.2015.11.218

Cited by 39 publications

(39 citation statements)

References 40 publications

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“…Further details to the experimental setup are given in Reference [37] and the references therein. The measurement was motivated by the hypothesis that the high temperature phase of LiBH4 was stabilized in the composite, thus shifting the phase To summarize, we observe from the PXD and SR-PXD data an increasing amount of ErB 4 during thermal decomposition and an increasing amount of ErH 2+δ during reabsorption for S2.…”

Section: Li-ion Conductivitymentioning

confidence: 99%

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Hydrogen Sorption in Erbium Borohydride Composite Mixtures with LiBH4 and/or LiH

et al. 2017

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Rare earth (RE) metal borohydrides have recently been receiving attention as possible hydrogen storage materials and solid-state Li-ion conductors. In this paper, the decomposition and reabsorption of Er(BH 4 ) 3 in composite mixtures with LiBH 4 and/or LiH were investigated. The composite of 3LiBH 4 + Er(BH 4 ) 3 + 3LiH has a theoretical hydrogen storage capacity of 9 wt %, nevertheless, only 6 wt % hydrogen are accessible due to the formation of thermally stable LiH. Hydrogen sorption measurements in a Sieverts-type apparatus revealed that during three desorption-absorption cycles of 3LiBH 4 + Er(BH 4 ) 3 + 3LiH, the composite desorbed 4.2, 3.7 and 3.5 wt % H for the first, second and third cycle, respectively, and thus showed good rehydrogenation behavior. In situ synchrotron radiation powder X-ray diffraction (SR-PXD) after ball milling of Er(BH 4 ) 3 + 6LiH resulted in the formation of LiBH 4 , revealing that metathesis reactions occurred during milling in these systems. Impedance spectroscopy of absorbed Er(BH 4 ) 3 + 6LiH showed an exceptional high hysteresis of 40-60 K for the transition between the high and low temperature phases of LiBH 4 , indicating that the high temperature phase of LiBH 4 is stabilized in the composite.

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Section: Li-ion Conductivitymentioning

confidence: 99%

Section: Li-ion Conductivitymentioning

confidence: 99%

Hydrogen Sorption in Erbium Borohydride Composite Mixtures with LiBH4 and/or LiH

et al. 2017

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“…The rest of the compounds are tetragonal, orthorhombic or monoclinic (Table 4). Using the same analogy to oxide structures, Li3K3La2(BH4)12 and Li3K3Ce2(BH4)12 (space group Ia3 d) are reported to have a garnet-type structure [48].…”

Section: Bi-and Trimetallic Re-borohydridesmentioning

confidence: 95%

“…The various Ca(BH4)2 polymorphs are, for instance, similar to TiO2 polymorphs (Ti 4+ being isoelectronic to Ca 2+ ) [47]. A series of 20 RE-borohydrides with perovskite-like structures have been reported [38,[48][49][50][51][52][53]. Seven of the compounds exhibit face-centered cubic double-perovskite-type structures (space group Fm3 ).…”

Section: Bi-and Trimetallic Re-borohydridesmentioning

confidence: 99%

Rare Earth Borohydrides—Crystal Structures and Thermal Properties

et al. 2017

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Rare earth (RE) borohydrides have received considerable attention during the past ten years as possible hydrogen storage materials due to their relatively high gravimetric hydrogen density. This review illustrates the rich chemistry, structural diversity and thermal properties of borohydrides containing RE elements. In addition, it highlights the decomposition and rehydrogenation properties of composites containing RE-borohydrides, light-weight metal borohydrides such as LiBH 4 and additives such as LiH.

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“…Similarly, zeolites contain three-dimensional negatively charged Al-Si-O networks [127]. Double perovskites LiA 2 M(BH 4 ) 6 have been observed for large alkali metals A = Rb, Cs and M = Y, Ce, Gd while the smaller alkali metal A = K stabilizes the garnet-type structure Li 3 K 3 M 2 (BH 4 ) 12 for M = La, Ce [128,129].…”

Section: Trimetallic Borohydridesmentioning

confidence: 99%

Complex Metal Hydrides for Hydrogen, Thermal and Electrochemical Energy Storage

et al. 2017

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Hydrogen has a very diverse chemistry and reacts with most other elements to form compounds, which have fascinating structures, compositions and properties. Complex metal hydrides are a rapidly expanding class of materials, approaching multi-functionality, in particular within the energy storage field. This review illustrates that complex metal hydrides may store hydrogen in the solid state, act as novel battery materials, both as electrolytes and electrode materials, or store solar heat in a more efficient manner as compared to traditional heat storage materials. Furthermore, it is highlighted how complex metal hydrides may act in an integrated setup with a fuel cell. This review focuses on the unique properties of light element complex metal hydrides mainly based on boron, nitrogen and aluminum, e.g., metal borohydrides and metal alanates. Our hope is that this review can provide new inspiration to solve the great challenge of our time: efficient conversion and large-scale storage of renewable energy.

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

Cited by 39 publications

References 40 publications

Hydrogen Sorption in Erbium Borohydride Composite Mixtures with LiBH4 and/or LiH

Hydrogen Sorption in Erbium Borohydride Composite Mixtures with LiBH4 and/or LiH

Rare Earth Borohydrides—Crystal Structures and Thermal Properties

Complex Metal Hydrides for Hydrogen, Thermal and Electrochemical Energy Storage

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