Lithium dendrites suppressed by low temperature in-situ anti-perovskite coated garnet solid-state electrolyte
| Autor: | Yonggang Wang, Xing Zhou, Wuliang Feng, Yongyao Xia, Xiaoli Dong, Zhengzhe Lai |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Composite number Energy Engineering and Power Technology chemistry.chemical_element Sintering 02 engineering and technology Electrolyte engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Coating chemistry Chemical engineering engineering Ionic conductivity Lithium Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology Electrochemical window Perovskite (structure) |
| Zdroj: | Journal of Power Sources. 500:229982 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2021.229982 |
| Popis: | Garnet-type solid-state electrolyte (SSE) has attracted much attention due to its wide electrochemical window, high mechanical strength, and chemically compatible with lithium metal. Nonetheless, the high sintering temperature and poor ability to suppress lithium dendrite strongly limit its application. Herein, we report a simple aqueous method to prepare in-situ lithium rich anti-perovskites (LiRAPs) coated garnet SSEs, and successfully reduce the sintering temperature from 1200 °C to 350 °C. The composite SSEs deliver a higher ionic conductivity (3.67 × 10−4 vs. 1.20 × 10−4 S cm−1) and a better cycling stability (84.8% capacity retention after 200 cycles vs. short-circuit after 90 cycles) than the pristine garnet SSEs. Moreover, the composite SSEs exhibit an improved ability to suppress lithium dendrite (over 200 h working for Li symmetrical cell and 0.7 mA cm−2 critical current density). This work demonstrates that in-situ LiRAPs coating strategy can effectively reduce the sintering temperature and suppress the Li dendrite growth inside the garnet electrolyte. |
| Databáze: | OpenAIRE |
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