Anchoring an Artificial Protective Layer To Stabilize Potassium Metal Anode in Rechargeable K–O2 Batteries
| Autor: | Neng Xiao, Yiying Wu, Gerald Gourdin, Luke Schkeryantz, Jingfeng Zheng |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Battery (electricity)
Materials science Potassium chemistry.chemical_element 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Chemical reaction Energy storage 0104 chemical sciences Corrosion Anode Metal chemistry Chemical engineering visual_art visual_art.visual_art_medium General Materials Science 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 11:16571-16577 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | Rechargeable potassium batteries, including the potassium-oxygen (K-O2) battery, are deemed as promising low-cost energy storage solutions. Nevertheless, the chemical stability of the K metal anode remains problematic and hinders their development. In the K-O2 battery, the electrolyte and dissolved oxygen tend to be reduced on the K metal anode, which consumes the active material continuously. Herein, an artificial protective layer is engineered on the K metal anode via a one-step method to mitigate side reactions induced by the solvent and reactive oxygen species. The chemical reaction between K and SbF3 leads to an inorganic composite layer that consists of KF, Sb, and KSb xF y on the surface. This in situ synthesized layer effectively prevents K anode corrosion while maintaining good K+ ionic conductivity in K-O2 batteries. Protection from O2 and moisture also ensures battery safety. Improved anode life span and cycling performance (>30 days) are further demonstrated. This work introduces a novel strategy to stabilize the K anode for rechargeable potassium metal batteries. |
| Databáze: | OpenAIRE |
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