Pyridine Complexes as Tailored Precursors for Rapid Synthesis of Thiophosphate Superionic Conductors. Issue 4 (5th January 2021)

• Record Type: Journal Article
• Authors: Ghidiu, Michael; Schlem, Roman; Zeier, Wolfgang G.
• Is Part Of: Batteries & supercaps. Volume 4:Issue 4(2021)
• Page Start: 607
• Page End: 611
• Publication Date: 2021-01-05
• Subjects: solid-state battery -- thiophosphate -- solution synthesis -- pyridine -- scalable; Electrochemistry -- Periodicals; Electrodes -- Periodicals; Electric batteries -- Periodicals; 621.31242
• DOI: 10.1002/batt.202000317
• Languages: English
• ISSNs: 2566-6223

Abstract

Abstract: Room temperature solution synthesis of electrolytes for all‐solid‐state batteries has garnered much interest in the past years as a more scalable and efficient alternative to traditional solid‐state syntheses. Li3 PS4, a model solid electrolyte often studied, is typically produced from Li2 S and P4 S10 ; the latter exists as a molecular solid in an adamantane‐like cage structure, and it has been posited that from its robustness arises a rate‐limiting reaction step. In this work, we have applied chemistry inspired from the organic thionation literature to easily transform the cage‐like P4 S10 into more reactive stabilized linear P2 S5 molecules. This new reagent was used to drastically reduce the synthesis time of Li3 PS4 in acetonitrile from days to hours. Because the long reaction time of many solvent routes to produce solid electrolytes is considered a bottleneck for commercialization, this work shows great promise for looking toward more fundamental chemistry in order to optimize solution syntheses. Abstract : Free the precursor ! To speed up the scalable solution‐based synthesis of the solid ionic conductor Li3 PS4, pyridine is used to 'break the cage' of the precursor P4 S10, forming P2 S5 . This reduces synthesis time in acetonitrile from over a day to hours.