Granular phase transformation of polycrystalline aluminum during electrochemical lithiation

Tianye Zheng, Xiaogang Wang, Ekta Jain, Dominik Kramer, Reiner Mӧnig, Matteo Seita, Steven T. Boles

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Lithium storage in aluminum stems from a phase transformation from lithium-poor α phase (Al, face-centered cubic) to lithium-rich β phase (LiAl, cubic) at room temperature. We investigate the electrochemical lithiation of polycrystalline Al using operando light microscopy coupled with electron backscatter diffraction. The operando videos reveal that the β phase patches expand radially from discrete nuclei with inhibition observed for specific Al grains at the α/β interface. Statistical analyses indicate that these grains have a preferred out-of-plane <111> orientation. This study suggests that lithiation of Al is a whole-grain process that is influenced by grain textures rather than grain boundaries.

Original languageEnglish
Pages (from-to)164-168
Number of pages5
JournalScripta Materialia
Volume188
DOIs
Publication statusPublished - Nov 2020

Keywords

  • EBSD
  • Lithium-ion batteries
  • Mechanical strain
  • Operando light microscopy
  • Phase transformation

ASJC Scopus subject areas

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

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