Journal
ACS ENERGY LETTERS
Volume 4, Issue 1, Pages 265-270Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.8b01997
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Funding
- BASF International Scientific Network for Electrochemistry and Batteries
- NSERC
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Argyrodites, Li6PS5X (X = Cl, Br), are considered to be one of the most promising solid-state electrolytes for solid-state batteries. However, while traditional ball-mill approaches to prepare these materials do not promote scale-up, solution-based preparative methods have resulted in poor ionic conductivity. Herein, we report a solution-engineered, scalable approach to these materials, including the new argyrodite solid solution phase Li6-yPS5-yCl1+y (y = 0-0.5), that shows very high ionic conductivities (up to 3.9 mS.cm(-1)) and negligible electronic conductivities. These properties are almost the same as their analogues prepared by solid-state methods, owing to a lack of amorphous contributions and low impurity contents ranging from 3 to 10%. Electrochemical performance is demonstrated for Li6PS5Cl in a prototype solid-state battery and compared to that of the same solid electrolyte derived from classic ball-milling processing.
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