Mesoporous TiO2 spheres with a nitridated conducting layer

Journal Article · Tue Jan 01 04:00:00 EST 2013 · Journal of Materials Science

DOI:https://doi.org/10.1007/s10853-012-7098-3· OSTI ID:1092193

Yoon, Sukeun ^[1]; Bridges, Craig A ^[1]; Unocic, Raymond R ^[1]; Paranthaman, Mariappan Parans ^[1]

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1. ORNL

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 samples have 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.

• Research Organization: Oak Ridge National Laboratory (ORNL); Shared Research Equipment Collaborative Research Center
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1092193
• Journal Information: Journal of Materials Science, Journal Name: Journal of Materials Science Journal Issue: 15 Vol. 48; ISSN 0022-2461
• Country of Publication: United States
• Language: English

Related Subjects

anode
lithium ion battery
mesoporous titania
nitridation