MoS2 as a long-life host material for potassium ion intercalation
| Autor: | Xiaodi Ren, Qiang Zhao, Yiying Wu, William D. McCulloch |
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| Rok vydání: | 2017 |
| Předmět: |
Diffraction
Chemistry Diffusion Potassium Inorganic chemistry Intercalation (chemistry) chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Anode Ion Metal visual_art visual_art.visual_art_medium General Materials Science Electrical and Electronic Engineering 0210 nano-technology |
| Zdroj: | Nano Research. 10:1313-1321 |
| ISSN: | 1998-0000 1998-0124 |
| DOI: | 10.1007/s12274-016-1419-9 |
| Popis: | Electrochemical potassium ion intercalation into two-dimensional layered MoS2 was studied for the first time for potential applications in the anode in potassium-based batteries. X-ray diffraction analysis indicated that an intercalated potassium compound, hexagonal K0.4MoS2, formed during the intercalation process. Despite the size of K+, MoS2 was a long-life host for repetitive potassium ion intercalation and de-intercalation with a capacity retention of 97.5% after 200 cycles. The diffusion coefficient of the K+ ions in KxMoS2 was calculated based on the Randles–Sevcik equation. A higher K+ intercalation ratio not only encountered a much slower K+ diffusion rate in MoS2, but also induced MoS2 reduction. This study shows that metal dichalcogenides are promising potassium anode materials for emerging K-ion, K-O2, and K-S batteries. |
| Databáze: | OpenAIRE |
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