Synthetic, structural, and electrochemical study of monoclinic Na4Ti5O12 as a sodium-ion battery anode material

Pierre J P Naeyaert, Maxim Avdeev, Neeraj Sharma, Hamdi Yahia, Chris D. Ling

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51 Citations (Scopus)

Abstract

The monoclinic phase of Na4Ti5O12 (M-Na4Ti5O12) has been investigated as a potential sodium-ion battery anode material. In contrast to the previously investigated trigonal phase (T-Na4Ti5O12), M-Na4Ti5O12 has continuous two-dimensional (2D) channels with partially occupied Na sites, providing broader pathways and more space for the intercalation of excess sodium. Electrochemical measurements show that it exhibits a comparable or higher reversible capacity than T-Na4Ti5O12. Neutron powder diffraction reveals the preferred sites and occupancies of the excess sodium. In situ synchrotron X-ray diffraction under electrochemical cycling shows that the crystal lattice undergoes strongly anisotropic volume changes during cycling.

Original languageEnglish
Pages (from-to)7067-7072
Number of pages6
JournalChemistry of Materials
Volume26
Issue number24
DOIs
Publication statusPublished - 23 Dec 2014
Externally publishedYes

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ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

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