Methylamine Lithium Borohydride as Electrolyte for All-Solid-State Batteries

Jakob B. Grinderslev; Lasse N. Skov; Jacob G. Andreasen; Shaiq Ghorwal; Jørgen Skibsted; Torben R. Jensen

doi:10.1002/anie.202203484

Methylamine Lithium Borohydride as Electrolyte for All-Solid-State Batteries

Jakob B. Grinderslev, Lasse N. Skov, Jacob G. Andreasen, Shaiq Ghorwal, 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

29 Citations (Scopus)

Abstract

Fast Li-ion conductivity at room temperature is a major challenge for utilization of all-solid-state Li batteries. Metal borohydrides with neutral ligands are a new emerging class of solid-state ionic conductors, and here we report the discovery of a new mono-methylamine lithium borohydride with very fast Li⁺ conductivity at room temperature. LiBH₄⋅CH₃NH₂ crystallizes in the monoclinic space group P2₁/c, forming a two-dimensional unique layered structure. The layers are separated by hydrophobic −CH₃ moieties, and contain large voids, allowing for fast Li-ionic conduction in the interlayers, σ(Li⁺)=1.24×10⁻³ S cm⁻¹ at room temperature. The electronic conductivity is negligible, and the electrochemical stability is ≈2.1 V vs Li. The first all-solid-state battery using a lithium borohydride with a neutral ligand as the electrolyte, Li-metal as the anode and TiS₂ as the cathode is demonstrated.

Original language	English
Article number	e202203484
Journal	Angewandte Chemie - International Edition
Volume	61
Issue	32
Number of pages	7
ISSN	1433-7851
DOIs	https://doi.org/10.1002/anie.202203484
Publication status	Published - Aug 2022

Keywords

Complex Hydrides
Energy Storage
Li-Metal Batteries
Solid-State Batteries
Solid-State Electrolytes

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title = "Methylamine Lithium Borohydride as Electrolyte for All-Solid-State Batteries",

abstract = "Fast Li-ion conductivity at room temperature is a major challenge for utilization of all-solid-state Li batteries. Metal borohydrides with neutral ligands are a new emerging class of solid-state ionic conductors, and here we report the discovery of a new mono-methylamine lithium borohydride with very fast Li+ conductivity at room temperature. LiBH4⋅CH3NH2 crystallizes in the monoclinic space group P21/c, forming a two-dimensional unique layered structure. The layers are separated by hydrophobic −CH3 moieties, and contain large voids, allowing for fast Li-ionic conduction in the interlayers, σ(Li+)=1.24×10−3 S cm−1 at room temperature. The electronic conductivity is negligible, and the electrochemical stability is ≈2.1 V vs Li. The first all-solid-state battery using a lithium borohydride with a neutral ligand as the electrolyte, Li-metal as the anode and TiS2 as the cathode is demonstrated.",

keywords = "Complex Hydrides, Energy Storage, Li-Metal Batteries, Solid-State Batteries, Solid-State Electrolytes",

author = "Grinderslev, {Jakob B.} and Skov, {Lasse N.} and Andreasen, {Jacob G.} and Shaiq Ghorwal and J{\o}rgen Skibsted and Jensen, {Torben R.}",

note = "Publisher Copyright: {\textcopyright} 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.",

year = "2022",

month = aug,

doi = "10.1002/anie.202203484",

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journal = "Angewandte Chemie - International Edition",

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Methylamine Lithium Borohydride as Electrolyte for All-Solid-State Batteries. / Grinderslev, Jakob B.; Skov, Lasse N.; Andreasen, Jacob G. et al.
In: Angewandte Chemie - International Edition, Vol. 61, No. 32, e202203484, 08.2022.

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

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T1 - Methylamine Lithium Borohydride as Electrolyte for All-Solid-State Batteries

AU - Grinderslev, Jakob B.

AU - Skov, Lasse N.

AU - Andreasen, Jacob G.

AU - Ghorwal, Shaiq

AU - Skibsted, Jørgen

AU - Jensen, Torben R.

PY - 2022/8

Y1 - 2022/8

N2 - Fast Li-ion conductivity at room temperature is a major challenge for utilization of all-solid-state Li batteries. Metal borohydrides with neutral ligands are a new emerging class of solid-state ionic conductors, and here we report the discovery of a new mono-methylamine lithium borohydride with very fast Li+ conductivity at room temperature. LiBH4⋅CH3NH2 crystallizes in the monoclinic space group P21/c, forming a two-dimensional unique layered structure. The layers are separated by hydrophobic −CH3 moieties, and contain large voids, allowing for fast Li-ionic conduction in the interlayers, σ(Li+)=1.24×10−3 S cm−1 at room temperature. The electronic conductivity is negligible, and the electrochemical stability is ≈2.1 V vs Li. The first all-solid-state battery using a lithium borohydride with a neutral ligand as the electrolyte, Li-metal as the anode and TiS2 as the cathode is demonstrated.

AB - Fast Li-ion conductivity at room temperature is a major challenge for utilization of all-solid-state Li batteries. Metal borohydrides with neutral ligands are a new emerging class of solid-state ionic conductors, and here we report the discovery of a new mono-methylamine lithium borohydride with very fast Li+ conductivity at room temperature. LiBH4⋅CH3NH2 crystallizes in the monoclinic space group P21/c, forming a two-dimensional unique layered structure. The layers are separated by hydrophobic −CH3 moieties, and contain large voids, allowing for fast Li-ionic conduction in the interlayers, σ(Li+)=1.24×10−3 S cm−1 at room temperature. The electronic conductivity is negligible, and the electrochemical stability is ≈2.1 V vs Li. The first all-solid-state battery using a lithium borohydride with a neutral ligand as the electrolyte, Li-metal as the anode and TiS2 as the cathode is demonstrated.

KW - Complex Hydrides

KW - Energy Storage

KW - Li-Metal Batteries

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KW - Solid-State Electrolytes

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Methylamine Lithium Borohydride as Electrolyte for All-Solid-State Batteries

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