Six-armed twin crystals composed of lithium iron silicate nanoplates and their electrochemical properties

Hiroyuki Kageyama, Yasuo Hashimoto, Yuya Oaki, Hiroaki Imai

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Orthorhombic lithium iron silicate (Li2FeSiO4) twin crystals with a novel six-fold symmetrical shape were prepared by a hydrothermal process. The specific six-armed structure was composed of single-crystalline unit plates surrounded by large (100) faces with a thickness of ca. 100 nm. Because of the short diffusion length of Li+ ions along [100], the six-armed twin crystals were advantageous for a cathode material of Li-ion batteries. We found the improved rate and cycle performance of the six-armed twin crystals without any carbon coatings by comparing them with random aggregates of Li2FeSiO4 nanoparticles. The design of particle morphology on the basis of the Li+ ion diffusion is effective for enhancing the electrochemical performance of active materials.

Original languageEnglish
Pages (from-to)8486-8491
Number of pages6
JournalCrystEngComm
Volume17
Issue number44
DOIs
Publication statusPublished - 2015 Oct 16

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Silicates
Electrochemical properties
Lithium
silicates
Iron
lithium
iron
Crystals
Ions
crystals
ions
diffusion length
electric batteries
Cathodes
Carbon
cathodes
Nanoparticles
Crystalline materials
coatings
Coatings

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Six-armed twin crystals composed of lithium iron silicate nanoplates and their electrochemical properties. / Kageyama, Hiroyuki; Hashimoto, Yasuo; Oaki, Yuya; Imai, Hiroaki.

In: CrystEngComm, Vol. 17, No. 44, 16.10.2015, p. 8486-8491.

Research output: Contribution to journalArticle

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