Self-Supported Formation of Needlelike Co3O4 Nanotubes and Their Application as Lithium-Ion Battery Electrodes


  • We thank Mr. Yasuyuki Kiya and Prof. H. D. Abruña for useful discussions about electrochemical data. We are grateful to the National Science Foundation (DMR 0404278) for supporting this study. Facilities available through the Cornell Center for Materials Research (CCMR), and Cornell Integrated Microscopy Center (CIMC) were used for this study. Supporting Information is available online from Wiley InterScience or from the authors.


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A one-step, self-supported topotactic transformation approach for synthesizing electrochemically active Co3O4 needlelike nanotubes is reported. Used as the active material in the negative electrode of a rechargeable lithium ion battery, the Co3O4 nanotubes manifest ultrahigh Li storage capacity with improved cycle life and rate capability. These features are discussed in terms of the unique structure of the materials.