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Semiconductors

, Volume 47, Issue 9, pp 1275–1281 | Cite as

Structural transformation of macroporous silicon anodes as a result of cyclic lithiation processes

  • G. V. Li
  • T. L. Kulova
  • V. A. Tolmachev
  • A. V. Chernienko
  • M. A. Baranov
  • S. I. Pavlov
  • E. V. Astrova
  • A. M. Skundin
Fabrication, Treatment, and Testing of Materials and Structures

Abstract

Anodes based on a regular lattice of macroporous silicon with different periods, sizes, and shapes of pore cross sections are studied. The discharge capacity and its degradation during cycling (embedding and extraction of lithium) are examined. Scanning electron microscopy is used to analyze changes in the electrode structure upon the lithiation/delithiation of Si and to evaluate the elemental composition of the porous material. An ex situ morphological analysis of the electrodes demonstrates that, on the whole, the porous structure is preserved upon cycling and the thickness of silicon walls increases. The degree of Si-wall destruction depends on their initial thickness. Estimates show that the electrolyte reduction process mainly occurs according to the two-electron mechanism, with inorganic salts of lithium formed as a result.

Keywords

Discharge Capacity Porous Silicon Passive Film Propylene Carbonate Dimethoxyethane 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Pleiades Publishing, Ltd. 2013

Authors and Affiliations

  • G. V. Li
    • 1
  • T. L. Kulova
    • 2
  • V. A. Tolmachev
    • 1
  • A. V. Chernienko
    • 1
  • M. A. Baranov
    • 3
  • S. I. Pavlov
    • 1
  • E. V. Astrova
    • 1
  • A. M. Skundin
    • 2
  1. 1.Ioffe Physical-Technical InstituteRussian Academy of SciencesSt. PetersburgRussia
  2. 2.Frumkin Institute of Physical Chemistry and ElectrochemistryRussian Academy of SciencesMoscowRussia
  3. 3.National Research University of Information Technologies, Mechanics, and OpticsSt. PetersburgRussia

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