Three-dimensional architectures of spinel-type LiMn2O 4 prepared from biomimetic porous carbonates and their application to a cathode for lithium-ion batteries

Hiroaki Uchiyama, Eiji Hosono, Haoshen Zhou, Hiroaki Imai

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

We demonstrated nanostructural control of a functional material for electrochemical applications by using a biomimetic solution route. A nanoscopically ordered architecture of calcite-type MnCO3 nanocrystals mimicking hierarchical structures of biological CaCO3 was successfully produced in an organic gel matrix. A highly porous structure of spinel-type LiMn2O4 was produced as a cathode material for lithium-ion batteries from the ordered MnCO3 architecture through nanocrystalline Mn2O3 as an intermediate phase. The rigid framework consisting of connected LiMn2O4 nanoparticles provided high durability in a lithium insertion/extraction process at a high current density due to a high porosity for the electrochemical reaction and three-dimensional channels for ion diffusion.

Original languageEnglish
Pages (from-to)4012-4016
Number of pages5
JournalJournal of Materials Chemistry
Volume19
Issue number23
DOIs
Publication statusPublished - 2009 Jun 19

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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