Novel processing of lithium manganese silicate nanomaterials for Li-ion battery applications

Murukanahally Kempaiah Devaraju, Takaaki Tomai, Atsushi Unemoto, Itaru Honma

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Lithium manganese silicate positive electrode materials have received great attention because of the two lithium ion capacities and can be realized in ultrafine nanoparticles due to their low volumetric changes upon lithium insertion and extraction. A supercritical fluid process has been adopted to synthesize monodisperse Li2MnSiO4 ultrafine particles and hierarchical nanostructures with a mean particle diameter of 4-5 nm and successfully shown to attain a high electrochemical performance. A reversible capacity (190-220 mA h g-1) of more than one lithium ion was obtained for the ultrafine monodisperse nanoparticles and hierarchical nanostructures with good cyclability. The enhanced cyclability was found to be due to the monodisperse nanoparticles, which provide a short length for Li-ion diffusion, and possess low volumetric changes. In addition, the varyingly sized Li 2MnSiO4 particles were also synthesized via a supercritical fluid process. This process is simple, rapid, energy saving and broadly applicable to other functional materials.

Original languageEnglish
Pages (from-to)608-615
Number of pages8
JournalRSC Advances
Volume3
Issue number2
DOIs
Publication statusPublished - 2013 Jan 14

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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