Article Synopsis
- A new superionic halogen-rich Li-argyrodite (HRLA) is introduced as a solid electrolyte for all-solid-state batteries, showcasing higher Li-ion conductivity than previously reported materials.
- The innovative synthesis process combines ultimate-energy mechanical alloying (UMA) and rapid thermal annealing (RTA), allowing for 70% crystallization in one step, with further improvement to 82% crystallization in just 25 minutes.
- The HRLA demonstrates strong performance as a solid electrolyte in various configurations, achieving a Li-ion conductivity of 10.2 mS/cm at 25 °C and delivering a capacity of 114.2 mAh/g at 0.5 C.
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Article Abstract
Although several crystalline materials have been developed as Li-ion conductors for use as solid electrolytes in all-solid-state batteries (ASSBs), producing materials with high Li-ion conductivities is time-consuming and cost-intensive. Herein, we introduce a superionic halogen-rich Li-argyrodite (HRLA) and demonstrate its innovative synthesis using ultimate-energy mechanical alloying (UMA) and rapid thermal annealing (RTA). UMA with a 49 G-force milling energy provides a one-pot process that includes mixing, glassification, and crystallization, to produce as-milled HRLA powder that is ∼70% crystallized; subsequent RTA using an infrared lamp increases this crystallinity to ∼82% within 25 min. Surprisingly, this HRLA exhibits the highest Li-ion conductivity among Li-argyrodites (10.2 mS cm at 25 °C, cold-pressed powder compact) reported so far. Furthermore, we confirm that this superionic HRLA works well as a promising solid electrolyte without a decreased intrinsic electrochemical window in various electrode configurations and delivers impressive cell performance (114.2 mAh g at 0.5 C).
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| http://dx.doi.org/10.1021/acs.nanolett.9b04597 | DOI Listing |
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