Entropy stabilized cubic Li7La3Zr2O12 with reduced lithium diffusion activation energy: studied using solid-state NMR spectroscopy

Juntian Fan; Tao Wang; Craig A. Bridges; Albina Y. Borisevich; Carlos A. Steren; Pengzhen Li; Bishnu P. Thapaliya; Chi-Linh Do-Thanh; Zhenzhen Yang; Yating Yuan; Sheng Dai

doi:10.1039/D3RA02206D

Entropy stabilized cubic Li₇La₃Zr₂O₁₂ with reduced lithium diffusion activation energy: studied using solid-state NMR spectroscopy†

Juntian Fan,^ab Tao Wang,^b Craig A. Bridges,^b Albina Y. Borisevich,

^c Carlos A. Steren,

^a Pengzhen Li,^d Bishnu P. Thapaliya,^b Chi-Linh Do-Thanh,

^a Zhenzhen Yang,^b Yating Yuan^b and Sheng Dai

*^ab

Author affiliations

* Corresponding authors

^a Department of Chemistry, University of Tennessee, Knoxville, TN 37996, USA

^b Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, USA
E-mail: dais@ornl.gov

^c Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, USA

^d Department of Agricultural and Resource Economics, University of Tennessee, Knoxville, TN 37996, USA

Abstract

Stabilizing cubic polymorph of Li₇La₃Zr₂O₁₂ at low temperatures is challenging and currently limited to mono- or dual-ion doping with aliovalent ions. Herein, a high-entropy strategy at the Zr sites was deployed to stabilize the cubic phase and lower the lithium diffusion activation energy, evident from the static ⁷Li and MAS ⁶Li NMR spectra.

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Entropy stabilized cubic Li₇La₃Zr₂O₁₂ with reduced lithium diffusion activation energy: studied using solid-state NMR spectroscopy†

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Entropy stabilized cubic Li₇La₃Zr₂O₁₂ with reduced lithium diffusion activation energy: studied using solid-state NMR spectroscopy

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