Superionic Halogen-Rich Li-Argyrodites Using In Situ Nanocrystal Nucleation and Rapid Crystal Growth
- Authors
- Jung, Wo Dum; Kim, Ji-Su; Choi, Sungjun; Kim, Seongmin; Jeon, Minjae; Jung, Hun-Gi; Chung, Kyung Yoon; Lee, Jong-Ho; Kim, Byung-Kook; Lee, Jong-Heun; Kim, Hyoungchul
- Issue Date
- 2020-04
- Publisher
- AMER CHEMICAL SOC
- Citation
- NANO LETTERS, v.20, no.4, pp.2303 - 2309
- 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 similar to 70% crystallized; subsequent RTA using an infrared lamp increases this crystallinity to similar to 82% within 25 min. Surprisingly, this HRLA exhibits the highest Li-ion conductivity among Li-argyrodites (10.2 mS cm(-1) at 25 degrees 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(-1) at 0.5 C).
- Keywords
- COMPOSITE; CAPACITY; SOLID-STATE BATTERIES; MAS-NMR; ELECTROLYTES; CRYSTALLIZATION; 1ST-PRINCIPLES; CONDUCTIVITY; STABILITY; Li-ion conductors; Li-argyrodites; mechanical alloying; rapid-thermal annealing; all-solid-state batteries
- ISSN
- 1530-6984
- URI
- https://pubs.kist.re.kr/handle/201004/118805
- DOI
- 10.1021/acs.nanolett.9b04597
- Appears in Collections:
- KIST Article > 2020
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