A Silatrane:Molecule-Based Crystal Composite Solid-State Electrolyte for All-Solid-State Lithium Batteries
Artikel i vetenskaplig tidskrift, 2019

All-solid-state batteries (ASSBs) are promoted as a promising option towards higher energies and power densities as well as drastically reduced safety risks as compared to conventional lithium-ion batteries (LIBs). Herein, a composite solid-state electrolyte (SSE) based on two crystalline materials with two distinctly different ion conduction mechanisms, percolation and ion hopping, is reported. By combining a silatrane (SA; here ethoxysilatrane) with a molecule-based crystal (MBC; here LiTFSI-TMEDA) the resulting SA : MBC 2 : 1 crystalline composite shows an appreciable ion conductivity of 10(-5) S cm(-1) at room temperature, and low apparent activation energy, 836 K, for the ion transport. Studies of the overall and local structure show that in the composite the Li+ and TFSI ions are dissociated, and this seems to be mediated by the SA part of the matrix. As a proof-of-concept, an ASSB based on this SSE can operate at 50 degrees C providing up to 105 mAh g(-1) during 20 cycles.

cooperative effect


ion hopping

solid-state electrolytes

conducting materials


Adriana Navarro Suárez

Chalmers, Fysik, Materialfysik

Patrik Johansson

Chalmers, Fysik, Materialfysik

Batteries and Supercaps

25666223 (eISSN)

Vol. 2 11 956-962


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