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Si-TiN alloy Li-ion battery negative electrode materials made by N2 gas milling

  • Y. Wang (a1) (a2), Simeng Cao (a1), Hui Liu (a1) (a2), Min Zhu (a2) and M.N. Obrovac (a1) (a3)...

Abstract

Si-TiN alloys are attractive for use as negative electrodes in Li-ion cells because of the high conductivity, low electrolyte reactivity, and thermal stability of TiN. Here it is shown that Si-TiN alloys with high Si content can surprisingly be made by simply ball milling Si and Ti powders in N2(g); a reaction not predicted by thermodynamics. This offers a low-cost and simple method of synthesizing these attractive materials. The resulting alloys have smaller grain sizes than Si-TiN made by ball milling Si and TiN directly, giving them high thermal stability and improved cycling characteristics in Li cells.

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Corresponding author

Address all correspondence to M.N. Obrovac at mnobrovac@dal.ca

References

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MRS Communications
  • ISSN: 2159-6859
  • EISSN: 2159-6867
  • URL: /core/journals/mrs-communications
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