Glass-like thermal transport in polycrystalline perovskite lithium-ion conductor Li3/8Sr7/16Hf1/4Ta3/4O3

Abstract

Understanding the thermal properties of lithium-ion conductors is vital for optimizing heat dissipation and enhancing the overall performance, reliability, and safety of all-solid-state batteries. Here, we investigate the specific heat and thermal conductivity of Li3/8Sr7/16Hf1/4Ta3/4O3 (LSHT), a promising perovskite-type lithium-ion conductor. We found that LSHT exhibits glass-like thermal behavior with a low thermal conductivity of 1.7 ± 0.5 W m−1 K−1 at room temperature, comparable to some amorphous materials yet distinct from typical crystalline perovskites. Our theoretical analysis indicates that diffusons contribute significantly to heat transfer within this highly disordered material. These findings provide crucial insights into thermal transport in LSHT, which are essential for effective thermal management in all-solid-state batteries utilizing this material.

Graphical abstract: Glass-like thermal transport in polycrystalline perovskite lithium-ion conductor Li3/8Sr7/16Hf1/4Ta3/4O3

Supplementary files

Article information

Article type
Communication
Submitted
14 Aug 2025
Accepted
19 Sep 2025
First published
29 Sep 2025

Chem. Commun., 2025, Advance Article

Glass-like thermal transport in polycrystalline perovskite lithium-ion conductor Li3/8Sr7/16Hf1/4Ta3/4O3

Y. Wang, Q. Jia, S. Li, L. Shi, Y. Li and X. Chen, Chem. Commun., 2025, Advance Article , DOI: 10.1039/D5CC04693A

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