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Restle TMF, Scherf L, Dums JV, Mutschke AG, Spranger RJ, Kirchhain H, Karttunen AJ, van Wüllen L, Fässler TF. Lithium-ion Mobility in Li 6 B 18 (Li 3 N) and Li Vacancy Tuning in the Solid Solution Li 6 B 18 (Li 3 N) 1-x (Li 2 O) x. Angew Chem Int Ed Engl 2023; 62:e202213962. [PMID: 36588091 DOI: 10.1002/anie.202213962] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 12/25/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023]
Abstract
All-solid-state batteries are promising candidates for safe energy-storage systems due to non-flammable solid electrolytes and the possibility to use metallic lithium as an anode. Thus, there is a challenge to design new solid electrolytes and to understand the principles of ion conduction on an atomic scale. We report on a new concept for compounds with high lithium ion mobility based on a rigid open-framework boron structure. The host-guest structure Li6 B18 (Li3 N) comprises large hexagonal pores filled with ∞ 1 [ ${{}_{{\rm { \infty }}}{}^{{\rm { 1}}}{\rm { [}}}$ Li7 N] strands that represent a perfect cutout from the structure of α-Li3 N. Variable-temperature 7 Li NMR spectroscopy reveals a very high Li mobility in the template phase with a remarkably low activation energy below 19 kJ mol-1 and thus much lower than pristine Li3 N. The formation of the solid solution of Li6 B18 (Li3 N) and Li6 B18 (Li2 O) over the complete compositional range allows the tuning of lithium defects in the template structure that is not possible for pristine Li3 N and Li2 O.
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Affiliation(s)
- Tassilo M F Restle
- Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany.,TUMInt.Energy Research GmbH, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Lavinia Scherf
- Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Jasmin V Dums
- Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Alexander G Mutschke
- Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Robert J Spranger
- Institute of Physics, Augsburg University, Universitätsstraße 1, 86159, Augsburg, Germany
| | - Holger Kirchhain
- Institute of Physics, Augsburg University, Universitätsstraße 1, 86159, Augsburg, Germany
| | - Antti J Karttunen
- Department of Chemistry and Materials Science, Aalto University, 00076, Aalto, Finland
| | - Leo van Wüllen
- Institute of Physics, Augsburg University, Universitätsstraße 1, 86159, Augsburg, Germany
| | - Thomas F Fässler
- Department of Chemistry, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
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Restle TMF, Scherf L, Dums JV, Mutschke AG, Spranger RJ, Kirchhain H, Karttunen AJ, van Wüllen L, Fässler TF. Lithium‐ion Mobility in Li6B18(Li3N) and Li Vacancy Tuning in the Solid Solution Li6B18(Li3N)1‐ x (Li2O) x. Angew Chem Int Ed Engl 2023. [DOI: 10.1002/ange.202213962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
| | - Lavinia Scherf
- Technical University Munich: Technische Universitat Munchen Chemistry GERMANY
| | - Jasmin V. Dums
- Technical University Munich: Technische Universitat Munchen Chemistry GERMANY
| | | | | | | | | | | | - Thomas Friedrich Fässler
- Technische Universität München: Technische Universitat Munchen Department of Chemistry Lichtenbergstr. 4 85747 Garching GERMANY
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