Three dimensional analysis of nanoporous silicon particles for Li-ion batteries

Lucian Roiban, Siddardha Koneti, Takeshi Wada, Hidemi Kato, Francisco J. Cadete Santos Aires, Sergiu Curelea, Thierry Epicier, Eric Maire

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Bulk nanoporous silicon prepared by top-down method form Li-ion batteries was investigated combining different conventional technique such as nitrogen physisorption and high resolution electron microscopy with electron tomography. It was found that the Si nanorods are forming porous aggregates with a half of the volume of the particle occupied by pores. The nanorods are preferentially oriented along the main axis of the aggregate. The porosity and the lack of compaction between the aggregates provide space for the Si expansion during the lithiation process. It was found that the Si nanorods mainly expose the {111} family plane as an external faces. The size distributions of the porous and solid phases in a granule were found to be similar. The pores represent 50% of the total volume of an aggregate. The shape orientation of the particles was quantified and it was found to exhibit a narrow distribution.

Original languageEnglish
Pages (from-to)165-170
Number of pages6
JournalMaterials Characterization
Volume124
DOIs
Publication statusPublished - 2017 Feb 1

Keywords

  • Bulk nano-porous silicon
  • Electron tomography
  • Li-ion batteries

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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