The Effects of Nanoconfinement in LiBH4·1/2CH3NH2-Al2O3 Composites

Jakob B. Grinderslev; Jørgen Skibsted; Torben R. Jensen

doi:10.1021/acsaem.4c02360

The Effects of Nanoconfinement in LiBH₄·1/2CH₃NH₂-Al₂O₃ Composites

Jakob B. Grinderslev, Jørgen Skibsted, Torben R. Jensen^*

^*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

1 Citation (Scopus)

Abstract

Optimization of all-solid-state lithium batteries necessitates the development of fast Li-ion conducting electrolytes. Lithium borohydride-based materials are a promising class of Li⁺ conductors with high ionic conductivity at ambient conditions. Here, we report the effects of nanoconfinement of LiBH₄·1/2CH₃NH₂ with Al₂O₃ nanoparticles, which result in the stabilization of an amorphous phase of LiBH₄·1/2CH₃NH₂. Consequently, the nanocomposites show an altered activation energy and demonstrate an order of magnitude increase in conductivity, reaching an extremely high ionic conductivity of σ(Li⁺) = 1.6 × 10^-2 S/cm at 34 °C. Thus, this work demonstrates that nanocomposite formation is an effective strategy to stabilize amorphous states to achieve higher ionic conductivity and at the same time provide a more stable mechanical framework.

Original language	English
Journal	ACS Applied Energy Materials
Volume	8
Issue	1
Pages (from-to)	298-305
Number of pages	8
ISSN	2574-0962
DOIs	https://doi.org/10.1021/acsaem.4c02360
Publication status	Published - 13 Jan 2025

Keywords

complex hydrides
Li-metal batteries
nanocomposites
solid-state batteries
solid-state electrolytes

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10.1021/acsaem.4c02360

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Cite this

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title = "The Effects of Nanoconfinement in LiBH4·1/2CH3NH2-Al2O3 Composites",

abstract = "Optimization of all-solid-state lithium batteries necessitates the development of fast Li-ion conducting electrolytes. Lithium borohydride-based materials are a promising class of Li+ conductors with high ionic conductivity at ambient conditions. Here, we report the effects of nanoconfinement of LiBH4·1/2CH3NH2 with Al2O3 nanoparticles, which result in the stabilization of an amorphous phase of LiBH4·1/2CH3NH2. Consequently, the nanocomposites show an altered activation energy and demonstrate an order of magnitude increase in conductivity, reaching an extremely high ionic conductivity of σ(Li+) = 1.6 × 10-2 S/cm at 34 °C. Thus, this work demonstrates that nanocomposite formation is an effective strategy to stabilize amorphous states to achieve higher ionic conductivity and at the same time provide a more stable mechanical framework.",

keywords = "complex hydrides, Li-metal batteries, nanocomposites, solid-state batteries, solid-state electrolytes",

author = "Grinderslev, \{Jakob B.\} and J{\o}rgen Skibsted and Jensen, \{Torben R.\}",

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T1 - The Effects of Nanoconfinement in LiBH4·1/2CH3NH2-Al2O3 Composites

AU - Grinderslev, Jakob B.

AU - Skibsted, Jørgen

AU - Jensen, Torben R.

PY - 2025/1/13

Y1 - 2025/1/13

N2 - Optimization of all-solid-state lithium batteries necessitates the development of fast Li-ion conducting electrolytes. Lithium borohydride-based materials are a promising class of Li+ conductors with high ionic conductivity at ambient conditions. Here, we report the effects of nanoconfinement of LiBH4·1/2CH3NH2 with Al2O3 nanoparticles, which result in the stabilization of an amorphous phase of LiBH4·1/2CH3NH2. Consequently, the nanocomposites show an altered activation energy and demonstrate an order of magnitude increase in conductivity, reaching an extremely high ionic conductivity of σ(Li+) = 1.6 × 10-2 S/cm at 34 °C. Thus, this work demonstrates that nanocomposite formation is an effective strategy to stabilize amorphous states to achieve higher ionic conductivity and at the same time provide a more stable mechanical framework.

AB - Optimization of all-solid-state lithium batteries necessitates the development of fast Li-ion conducting electrolytes. Lithium borohydride-based materials are a promising class of Li+ conductors with high ionic conductivity at ambient conditions. Here, we report the effects of nanoconfinement of LiBH4·1/2CH3NH2 with Al2O3 nanoparticles, which result in the stabilization of an amorphous phase of LiBH4·1/2CH3NH2. Consequently, the nanocomposites show an altered activation energy and demonstrate an order of magnitude increase in conductivity, reaching an extremely high ionic conductivity of σ(Li+) = 1.6 × 10-2 S/cm at 34 °C. Thus, this work demonstrates that nanocomposite formation is an effective strategy to stabilize amorphous states to achieve higher ionic conductivity and at the same time provide a more stable mechanical framework.

KW - complex hydrides

KW - Li-metal batteries

KW - nanocomposites

KW - solid-state batteries

KW - solid-state electrolytes

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