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Published on: August 12, 2013
Na3PS3O as a Solid Electrolyte: Influence of the Synthesis Method on the Structural Unit Formation
Romain Dufrene1,2, David Mathiron3, Christian Masquelier1,2,4
1Laboratoire de Réactivité et de Chimie des Solides, Université de Picardie Jules Verne, UMR CNRS 7314, Amiens Cedex 180039, France.
Inorganic Chemistry
|August 11, 2026
Summary
Researchers explored sodium ortho-thiophosphate (Na3PS4) derivatives for solid-state batteries. They found that synthesizing pure Na3PS3O is challenging, with impurities affecting properties, impacting battery development.
Area of Science:
- Materials Science
- Electrochemistry
- Solid-State Chemistry
Background:
- Sodium all-solid-state batteries are crucial for next-generation energy storage.
- Sodium ortho-thiophosphate (Na3PS4) shows promise as a solid electrolyte due to high ionic conductivity.
- Na3PS4's instability with sodium metal anodes and moisture necessitates material modification.
Purpose of the Study:
- To investigate the synthesis of sodium oxy-thiophosphate (Na3PS3O) phases.
- To evaluate the impact of synthesis methods on phase purity and structure.
- To understand how the physical state of Na3PS3O affects its ionic conduction properties.
Main Methods:
- Aqueous synthesis of Na3PS3O.
- Mechanochemical synthesis of Na3PS3O with subsequent annealing.
- Ball-milling techniques for amorphous phase attempts.
Main Results:
- Aqueous synthesis yielded crystalline Na3PS3O with PS2O23- and PSO33- impurities.
- Mechanochemical synthesis followed by annealing produced Na3PS3O with P2O74- impurities.
- Direct mechanochemical synthesis did not yield pure amorphous Na3PS3O, resulting in a PS43- matrix with mixed species.
Conclusions:
- Achieving pure Na3PS3O is difficult due to inherent impurity formation during synthesis.
- The presence of impurities significantly influences the material's structural and conductive characteristics.
- Further research is needed to overcome synthesis challenges for stable solid-state electrolytes.
