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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
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Sulfide Electrolyte Suppressing Side Reactions in Composite Positive Electrodes for All-Solid-State Lithium Batteries
Misae Otoyama1, Atsushi Sakuda1, Masahiro Tatsumisago1
1Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
ACS Applied Materials & Interfaces
|June 9, 2020
Summary
Lithium-ion battery research shows Li4SnS4 offers superior thermal stability over Li3PS4, preventing side reactions in solid-state batteries. This enhances ionic conductivity and battery performance through improved manufacturing processes.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Batteries
Background:
- All-solid-state batteries require stable composite electrodes to prevent side reactions and ensure longevity.
- Robust solid electrolytes resistant to oxidation and decomposition are crucial for enhancing battery performance.
Purpose of the Study:
- To evaluate the thermal stability of sulfide solid electrolytes (Li3PS4 and Li4SnS4) against oxide positive electrode active materials.
- To investigate the impact of electrolyte-electrode interface reactions on battery performance during accelerated aging.
Main Methods:
- Comparative analysis of Li3PS4 and Li4SnS4 thermal stability.
- Accelerated aging tests on composite electrodes to identify side reactions.
- Investigation of sintering processes for composite electrode manufacturing.
Main Results:
- Li4SnS4 demonstrated higher thermal stability compared to Li3PS4 due to suppressed sulfur-oxygen substitution reactions.
- Sintering of composite electrodes with Li4SnS4 resulted in dense structures with increased ionic conductivity.
- Improved electrode density and ionic conductivity led to enhanced overall battery performance.
Conclusions:
- Li4SnS4 is a promising solid electrolyte for long-lasting all-solid-state batteries due to its superior thermal stability.
- The enhanced thermal stability of Li4SnS4 facilitates improved manufacturing processes, leading to better battery performance.
Keywords:
Li4SnS4all-solid-state lithium batterycomposite positive electrodesulfide solid electrolytethermal stabilityMore Related Videos
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