Mesoporous TiO2 spheres with a nitridated conducting layer for lithium-ion batteries

Sukeun Yoon, Craig A. Bridges, Raymond R. Unocic, M. Parans Paranthaman

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Nitridated TiO2 mesoporous spheres have been synthesized by hydrothermal processing followed by post-nitridation with NH3. Characterization data reveal a nitridated conducting layer, in addition to a mesoporous and nanosized building-block morphology resulting in a large surface area. The sample has an average pore size and surface area of, respectively, 10 nm and 87 m2/g. The nitridated TiO2 mesoporous spheres exhibit a high capacity of >200 mAh/g with good cyclability and high rate capability, as the nitridated conducting layer and favorable morphology of nanosized spheres provides good electrical contact, accommodates cycling induced strain smoothly, and facilitates lithium-ion diffusion.

Original languageEnglish
Pages (from-to)5125-5131
Number of pages7
JournalJournal of Materials Science
Volume48
Issue number15
DOIs
StatePublished - Aug 2013

Funding

Acknowledgements This work was sponsored by the Materials Science and Engineering Division, Office of Basic Energy Sciences, U.S. Department of Energy. Microscopy and XPS work were conducted at the ORNL SHaRE user facility, which is sponsored by the Office of Basic Energy Sciences, U.S. Department of Energy. We acknowledge Harry Meyer III for assistance with XPS data analysis. S. Yoon acknowledges the support of the ORISE postdoctoral fellowship.

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