Abstract
Fe-Mn-Si alloys prepared by ball milling were investigated as negative electrodes for Li-ion batteries. X-ray diffraction and room temperature 57Fe Mössbauer measurements were used to characterize alloy structure, which revealed the formation of ternary (Fe,Mn,)11Si19 solid solutions. During cycling in Li cells, the formation of crystalline Li15Si4 was effectively suppressed by inactive transition metal silicide phases, resulting in good cycling performance. In addition, Fe was found to be superior to Mn in avoiding excessive side reactions with electrolyte during cycling.
| Original language | English |
|---|---|
| Pages (from-to) | A21-A26 |
| Journal | Journal of the Electrochemical Society |
| Volume | 166 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2019 |
Bibliographical note
Funding Information:The authors would like to acknowledge funding from NSERC and 3M Canada, Co. under the auspices of the Industrial Research Chair program. We also acknowledge the support of the Canada Foundation for Innovation, the Atlantic Innovation Fund and other partners that fund the Facilities for Materials Characterization managed by the Institute for Research in Materials, and Dr. Jeff Dahn for use of the pycnometer. Yidan Cao acknowledges financial support from the Killam Trusts.
Publisher Copyright:
© The Author(s) 2019.
ASJC Scopus Subject Areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films
- Electrochemistry
- Materials Chemistry
