Flux growth of hexagonal cylindrical LiCoO2 crystals surrounded by Li-ion conducting preferential facets and their electrochemical properties studied by single-particle measurements

N. Zettsu, K. Nishikawa, K. Yubuta, K. Sakurai, Y. Yamamoto, Y. Mizuno, S. Oishi, K. Teshima

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

In this study, we demonstrate the template-mediated flux growth of one-dimensional LiCoO2 single crystals surrounded by {104} faces in a hot solution of LiCl-KCl. The reaction and growth processes were characterized by time-dependent X-ray diffraction and scanning electron microscopy. The transformation in the crystal shape from rectangular to hexagonal cylindrical was considered to be directly related to the gradual lithiation of the starting CoO whiskers. Single particle galvanostatic tests of the single-strand LiCoO2 crystals were carried out. The LiCoO2 crystals exhibited excellent rate performance and more than 65% of the full capacity was maintained under ca. 370C. These characteristics likely resulted from the exposure of the {104} faces, since they were electrochemically active in layered LiCoO2 with an α-NaFeO2 structure and favored fast Li+ transportation. This finding will facilitate the development of new materials for advanced lithium ion rechargeable batteries.

Original languageEnglish
Pages (from-to)17016-17021
Number of pages6
JournalJournal of Materials Chemistry A
Volume3
Issue number33
DOIs
Publication statusPublished - 2015 Jun 28

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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