An investigation of the Fe-Mn-Si system for Li-ion battery negative electrodes

Yidan Cao, Benjamin Scott, R. A. Dunlap, Jun Wang, M. N. Obrovac

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

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 languageEnglish
Pages (from-to)A21-A26
JournalJournal of the Electrochemical Society
Volume166
Issue number2
DOIs
Publication statusPublished - 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

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