| Autor: |
Xiuyun Zhao, Lauren MacEachern, R. J. Sanderson, R. A. Dunlap, Mark N. Obrovac |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Electrochimica Acta. 170:16-24 |
| ISSN: |
0013-4686 |
| DOI: |
10.1016/j.electacta.2015.04.116 |
| Popis: |
A thin film binary library of carbon-rich Fe1-xCx (0.47 ≤ x ≤ 0.97) alloys was prepared by combinatorial sputtering of carbon and iron. The sputtered library was characterized by X-ray diffraction and room temperature 57Fe Mossbauer effect spectroscopy to determine its microstructure. X-ray diffraction results show that the Fe1-xCx film is amorphous in the whole composition range of the library. For 0.52 ≤ x ≤ 0.59, a hyperfine field distribution and a quadrupole splitting distribution as obtained from Mossbauer spectra indicate the presence of a ferromagnetic phase and a paramagnetic phase in this regime. With increasing of carbon content, for 0.61 ≤ x ≤ 0.97, the sextet disappears and two paramagnetic doublets splitting appear suggesting two different Fe sites. The electrochemical performance of the Fe1-xCx film was investigated in lithium cells and the presence of Fe was found to increase the reversible capacity per mass of carbon over that of a pure carbon electrode. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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