Application of WS2-G composite as cathode for rechargeable magnesium batteries
| Autor: | J. Vatsala Rani, Sanjay Biswas, M. Madhavi Latha |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Graphene General Chemical Engineering Intercalation (chemistry) Composite number General Engineering General Physics and Astronomy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode 0104 chemical sciences law.invention Dielectric spectroscopy X-ray photoelectron spectroscopy Chemical engineering law General Materials Science Cyclic voltammetry 0210 nano-technology |
| Zdroj: | Ionics. 26:3395-3404 |
| ISSN: | 1862-0760 0947-7047 |
| DOI: | 10.1007/s11581-020-03512-w |
| Popis: | The graphene-supported WS2 composite (WS2-G) was synthesized by the ultra-sonication method. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and field emission scanning electron microscopy (FESEM) showed WS2 had been successfully combined with the graphene. The charge-discharge tests, cyclic voltammetry, and electrochemical impedance spectroscopy were used to study electrochemical properties of as-synthesized composite material. The results showed that the electrochemical properties of graphene-supported WS2 were superior to that of WS2 material. The initial discharge capacity of the graphene-supported WS2 material reached 82 mAh g−1. After 100 cycles, it still had a capacity retention rate of 95%. Enhanced electrochemical performance of graphene-supported WS2 could be attributed due to the synergistic effect between WS2 and highly conductive graphene. The intercalation behavior of Mg2+ is further confirmed by XRD, EDX, and XPS analysis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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