Related Experiment Video
Updated: Jul 24, 2025
11:25
In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
Published on: November 10, 2014
15.8K
Entropy stabilized cubic Li7La3Zr2O12 with reduced lithium diffusion activation energy: studied using solid-state NMR
Juntian Fan1,2, Tao Wang2, Craig A Bridges2
1Department of Chemistry, University of Tennessee Knoxville TN 37996 USA.
RSC Advances
|July 6, 2023
Summary
Stabilizing cubic Li7La3Zr2O12 solid electrolytes is difficult. A high-entropy doping strategy at the Zr sites successfully stabilized the cubic phase and reduced lithium diffusion activation energy.
Area of Science:
- Solid-state chemistry
- Materials science
- Electrochemistry
Background:
- Stabilizing the cubic phase of lithium lanthanum zirconium oxide (Li7La3Zr2O12) solid electrolytes at low temperatures is crucial for efficient ion conduction.
- Current methods rely on mono- or dual-ion doping with aliovalent ions, which have limitations.
Purpose of the Study:
- To investigate a novel high-entropy doping strategy at the Zr sites to stabilize the cubic phase of Li7La3Zr2O12.
- To evaluate the impact of this strategy on lithium diffusion kinetics.
Main Methods:
- Synthesis of high-entropy doped Li7La3Zr2O12 materials.
- Characterization using static 7Li and MAS 6Li Nuclear Magnetic Resonance (NMR) spectroscopy.
Main Results:
- The high-entropy doping strategy effectively stabilized the cubic phase of Li7La3Zr2O12 at low temperatures.
- NMR spectra confirmed a reduction in lithium diffusion activation energy in the doped materials.
Conclusions:
- High-entropy doping at Zr sites is a promising approach for stabilizing the cubic phase of Li7La3Zr2O12 solid electrolytes.
- This strategy enhances lithium ion mobility, paving the way for improved solid-state battery performance.
