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High Lithium Electroactivity of Nanometer-Sized Rutile TiO2

Authors


  • We thank G. Götz, V. Duppel, A. Fuchs, and Dr. R. E. Dinnebier for their technical support; Drs. P. Balaya, R. Merkle, and P. Zapol for helpful discussions; and Dr. S. Hore for reading the manuscript. We are indebted to the MPG-ENERCHEM Project. We also acknowledge the valuable remarks from the reviewers. Supporting Information is available online from Wiley InterScience or from the authors.

Abstract

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Nanometer-sized rutile shows much higher electroactivity towards Li insertion than micrometer-sized rutile. Up to 0.8 mol of Li per mole of TiO2 can be inserted into nanometer-sized rutile at room temperature (see figure), which is able to reversibly accommodate Li up to Li0.5TiO2 with excellent capacity retention and high rate capability on cycling, rendering it a promising anode material for high-power lithium-ion batteries.

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