In situ transmission electron microscopy observation of microstructure and phase evolution in a SnO2 nanowire during lithium intercalation

Chong Min Wang, Wu Xu, Jun Liu, Ji Guang Zhang, Lax V. Saraf, Bruce W. Arey, Daiwon Choi, Zhen Guo Yang, Jie Xiao, Suntharampillai Thevuthasan, Donald R. Baer

Research output: Contribution to journalArticle

209 Citations (Scopus)

Abstract

Recently we have reported structural transformation features of SnO 2 upon initial charging using a configuration that leads to the sequential lithiation of SnO2 nanowire from one end to the other (Huang et al. Science2010, 330, 1515). A key question to be addressed is the lithiation behavior of the nanowire when it is fully soaked into the electrolyte (Chiang Science2010, 330, 1485). This Letter documents the structural characteristics of SnO2 upon initial charging based on a battery assembled with a single nanowire anode, which is fully soaked (immersed) into an ionic liquid based electrolyte using in situ transmission electron microscopy. It has been observed that following the initial charging the nanowire retained a wire shape, although highly distorted. The originally straight wire is characterized by a zigzag structure following the phase transformation, indicating that during the phase transformation of SnO2 + Li ↔ LixSn + LiyO, the nanowire was subjected to severe deformation, as similarly observed for the case when the SnO2 was charged sequentially from one end to the other. Transmission electron microscopy imaging revealed that the LixSn phase possesses a spherical morphology and is embedded into the amorphous LiyO matrix, indicating a simultaneous partitioning and coarsening of LixSn through Sn and Li diffusion in the amorphous matrix accompanied the phase transformation. The presently observed composite configuration gives detailed information on the structural change and how this change takes place on nanometer scale.

Original languageEnglish
Pages (from-to)1874-1880
Number of pages7
JournalNano Letters
Volume11
Issue number5
DOIs
Publication statusPublished - 11 May 2011
Externally publishedYes

Fingerprint

Intercalation
Lithium
intercalation
Nanowires
nanowires
lithium
Transmission electron microscopy
transmission electron microscopy
microstructure
Microstructure
phase transformations
charging
Phase transitions
Electrolytes
electrolytes
wire
Wire
Ionic Liquids
Coarsening
matrices

Keywords

  • in situ TEM
  • Li-ion battery
  • microstructure
  • nanobattery
  • SnO nanowire

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

Cite this

In situ transmission electron microscopy observation of microstructure and phase evolution in a SnO2 nanowire during lithium intercalation. / Wang, Chong Min; Xu, Wu; Liu, Jun; Zhang, Ji Guang; Saraf, Lax V.; Arey, Bruce W.; Choi, Daiwon; Yang, Zhen Guo; Xiao, Jie; Thevuthasan, Suntharampillai; Baer, Donald R.

In: Nano Letters, Vol. 11, No. 5, 11.05.2011, p. 1874-1880.

Research output: Contribution to journalArticle

Wang, CM, Xu, W, Liu, J, Zhang, JG, Saraf, LV, Arey, BW, Choi, D, Yang, ZG, Xiao, J, Thevuthasan, S & Baer, DR 2011, 'In situ transmission electron microscopy observation of microstructure and phase evolution in a SnO2 nanowire during lithium intercalation', Nano Letters, vol. 11, no. 5, pp. 1874-1880. https://doi.org/10.1021/nl200272n
Wang, Chong Min ; Xu, Wu ; Liu, Jun ; Zhang, Ji Guang ; Saraf, Lax V. ; Arey, Bruce W. ; Choi, Daiwon ; Yang, Zhen Guo ; Xiao, Jie ; Thevuthasan, Suntharampillai ; Baer, Donald R. / In situ transmission electron microscopy observation of microstructure and phase evolution in a SnO2 nanowire during lithium intercalation. In: Nano Letters. 2011 ; Vol. 11, No. 5. pp. 1874-1880.
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