Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 19, Issue 23, Pages 4012-4016Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b900397e
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan [20360302]
- JSPS
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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.
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