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The electrical transport property of a material is defined by its resistance and conductivity. Resistance is the measure of a material's ability to resist the flow of electric current, while conductivity gauges its ability to allow the current to pass through, depending on the geometry of the measurement cell, such as electrode spacing and area. Conductivity is measured in Siemens (S). There are different types of conductance, including specific conductance, equivalent conductance, and molar...

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Li10SnP2S12: an affordable lithium superionic conductor.

Philipp Bron¹, Sebastian Johansson, Klaus Zick

¹Fachbereich Chemie und Wissenschaftliches Zentrum für Materialwissenschaften (WZMW), Philipps-Universität Marburg , Hans-Meerwein-Straße, 35043 Marburg, Germany.

Journal of the American Chemical Society

|October 2, 2013

Summary

Researchers synthesized a new superionic conductor, lithium tin phosphorus sulfide (Li10SnP2S12), with high ionic conductivity. This material offers a cost-effective alternative to existing technologies for advanced energy storage applications.

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

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Published on: November 11, 2013

Area of Science:

Materials Science
Solid-State Chemistry
Electrochemistry

Background:

Superionic conductors are crucial for advanced battery technologies.
Lithium germanium phosphorus sulfide (Li10GeP2S12) exhibits record ionic conductivity but relies on expensive germanium.
There is a need for cost-effective superionic conductors with comparable performance.

Purpose of the Study:

To synthesize and characterize a novel thiostannate superionic conductor.
To evaluate the ionic conductivity of the new material.
To assess the potential for cost reduction by replacing germanium with tin.

Main Methods:

Solid-state reaction synthesis using lithium sulfide (Li2S), phosphorus pentasulfide (P2S5), and lithium thiostannate (Li4[SnS4]).
Electrochemical impedance spectroscopy to measure ionic conductivity.
Structural and compositional analysis (details not provided in abstract).

Main Results:

Successful synthesis of Li10SnP2S12, a thiostannate analogue of Li10GeP2S12.
Achieved high ionic conductivity: 7 mS/cm (grain) and 4 mS/cm (total) at 27 °C.
Tin-based material offers a potential cost reduction of approximately 3x compared to germanium.

Conclusions:

Li10SnP2S12 is a promising new superionic conductor with high ionic conductivity.
The tin-based material demonstrates comparable performance to Li10GeP2S12.
This discovery paves the way for more affordable, high-performance solid-state electrolytes.