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Related Experiment Video

Updated: Jun 3, 2025

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

Published on: August 12, 2013

Li_1.6AlCl_3.4S_0.6: a low-cost and high-performance solid electrolyte for solid-state batteries.

Tej P Poudel^1,2,3, Ifeoluwa P Oyekunle^2,3, Michael J Deck^2,3

¹Materials Science and Engineering Program, The Graduate School, Florida State University 2005 Levy Ave. Tallahassee FL 32310 USA yhu@fsu.edu.

Chemical Science

|January 10, 2025

Summary

Researchers developed a new solid electrolyte, lithium aluminum chalcohalide (Li1.6AlCl3.4S0.6), using a simple milling process. This material significantly enhances ionic conductivity for next-generation all-solid-state batteries.

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Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

Published on: December 20, 2016

Area of Science:

Materials Science
Electrochemistry
Solid-State Chemistry

Background:

Solid electrolytes (SEs) are critical for advanced rechargeable batteries but face limitations in cost, scalability, and ionic conductivity.
Lithium tetrahaloaluminates are cost-effective but suffer from low Li+ conductivity and high activation energy.
Developing high-performance, economical SEs is essential for commercializing all-solid-state batteries (ASSBs).

Purpose of the Study:

To synthesize a novel lithium aluminum chalcohalide solid electrolyte with improved ionic conductivity.
To investigate the structural and transport properties of the new material.
To evaluate the performance of the developed SE in all-solid-state battery applications.

Main Methods:

One-step mechanochemical milling synthesis of lithium aluminum chalcohalide (Li1.6AlCl3.4S0.6) from inexpensive precursors.
Characterization using high-resolution X-ray diffraction (XRD) and 6Li magic-angle-spinning (MAS) NMR spectroscopy.
Computational analysis using ab initio molecular dynamics (AIMD) simulations.

Main Results:

Achieved a significant increase in ionic conductivity from 0.008 mS cm-1 for LiAlCl4 to 0.18 mS cm-1 for Li1.6AlCl3.4S0.6 at 25 °C.
Structural analysis revealed tetrahedrally-coordinated LiCl-S octahedra facilitating 3D Li+ transport.
AIMD simulations confirmed an enhanced 3D Li+ migration network with increased diffusivity.
All-solid-state battery half-cells demonstrated high-rate and stable cycling performance.

Conclusions:

The synthesized Li1.6AlCl3.4S0.6 solid electrolyte offers a cost-effective solution with enhanced ionic conductivity.
The mixed Cl-S anion sublattice and resulting structural features promote efficient 3D Li+ transport.
This material shows significant potential for high-performance and stable all-solid-state batteries.