Investigation of structural change and electrochemical reaction of spinel-LiMn2O4 by neutron diffraction

Hyoree Seo, Baekseok Seong, Keon Kim, Cheol Woo Yi

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The structural change during electrochemical cycling in full-cell system has been investigated by neutron diffraction method and the full-cell consists of spinel-lithium manganese oxide cathode and graphite anode. The structural variation has been monitored by in-situ neutron diffraction technique at different state of charges (SOCs), and the obtained data were compared with ex-situ powder neutron diffraction patterns. Phase transitions for lithiated/delithiated graphite can clearly explain that the intercalated lithium ions in graphite are not perfectly extracted during a delithiaion process. The content of LiC12 phase increases as an increase in electrochemical cycle numbers, and the lattice parameter of LiMn2O4 also decreases due to the reduction of the amounts of Li ions, which can be reversibly intercalated/deintercalated into/from the structure.

Original languageEnglish
Pages (from-to)472-477
Number of pages6
JournalJournal of Ceramic Processing Research
Volume17
Issue number5
Publication statusPublished - 2016

Keywords

  • In-situ
  • LiMnO
  • Neutron diffraction
  • Structural change

ASJC Scopus subject areas

  • Ceramics and Composites

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