In:
Angewandte Chemie, Wiley, Vol. 134, No. 32 ( 2022-08-08)
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. LiBH 4 ⋅CH 3 NH 2 crystallizes in the monoclinic space group P 2 1 / c , forming a two‐dimensional unique layered structure. The layers are separated by hydrophobic −CH 3 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 TiS 2 as the cathode is demonstrated.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v134.32
DOI:
10.1002/ange.202203484
Language:
English
Publisher:
Wiley
Publication Date:
2022
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