Atomic-scale observation of lithiation reaction front in nanoscale SnO2 materials

Anmin Nie, Liyong Gan, Yingchun Cheng, Hasti Asayesh-Ardakani, Qianqian Li, Cezhou Dong, Runzhe Tao, Farzad Mashayek, Hongtao Wang, Udo Schwingenschlögl, Robert F. Klie, Reza Shahbazian Yassar

Research output: Contribution to journalArticlepeer-review

109 Scopus citations

Abstract

In the present work, taking advantage of aberration-corrected scanning transmission electron microscopy, we show that the dynamic lithiation process of anode materials can be revealed in an unprecedented resolution. Atomically resolved imaging of the lithiation process in SnO2 nanowires illustrated that the movement, reaction, and generation of b = [1Ì...1Ì...1] mixed dislocations leading the lithiated stripes effectively facilitated lithium-ion insertion into the crystalline interior. The geometric phase analysis and density functional theory simulations indicated that lithium ions initial preference to diffuse along the [001] direction in the {200} planes of SnO2 nanowires introduced the lattice expansion and such dislocation behaviors. At the later stages of lithiation, the Li-induced amorphization of rutile SnO2 and the formation of crystalline Sn and LixSn particles in the Li2O matrix were observed. © 2013 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)6203-6211
Number of pages9
JournalACS Nano
Volume7
Issue number7
DOIs
StatePublished - Jun 10 2013

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Materials Science(all)
  • Engineering(all)

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