dc.contributor.authorPark, Hyunjung
dc.contributor.authorWu, Hao Bin
dc.contributor.authorSong, Taeseup
dc.contributor.authorLou, David Xiong Wen
dc.contributor.authorPaik, Ungyu
dc.date.accessioned2015-02-02T03:39:05Z
dc.date.available2015-02-02T03:39:05Z
dc.date.copyright2015en_US
dc.date.issued2015
dc.identifier.citationPark, H., Wu, H. B., Song, T., Lou, D. X. W., & Paik, U. (2015). Porosity-controlled TiNb2O7 microspheres with partial nitridation as a practical negative electrode for high-power lithium-ion batteries. Advanced energy materials,5(8), 1401945-.en_US
dc.identifier.issn1614-6832en_US
dc.identifier.urihttp://hdl.handle.net/10220/24996
dc.description.abstractTitanium niobium oxide (TiNb2O7) has been recognized as a promising anode material for lithium-ion batteries (LIBs) in view of its potential to operate at high rates with improved safety and high theoretical capacity of 387 mAh g−1. However, it suffers from poor Li+ ion diffusivity and low electronic conductivity originated from its wide band gap energy (Eg > 2 eV). Here, porous TiNb2O7 microspheres (PTNO MSs) are prepared via a facile solvothermal reaction. PTNO MSs have a particle size of ≈1.2 μm and controllable pore sizes in the range of 5–35 nm. Ammonia gas nitridation treatment is conducted on PTNO MSs to introduce conducting Ti1−xNbxN layer on the surface and form nitridated PTNO (NPTNO) MSs. The porous structure and conducting Ti1−xNbxN layer enhance the transport kinetics associated with Li+ ions and electrons, which leads to significant improvement in electrochemical performance. As a result, the NPTNO electrode shows a high discharge capacity of ≈265 mAh g−1, remarkable rate capability (≈143 mAh g−1 at 100 C) and durable long-term cyclability (≈91% capacity retention over 1000 cycles at 5 C). These results demonstrate the great potential of TiNb2O7 as a practical high-rate anode material for LIBs.en_US
dc.language.isoenen_US
dc.relation.ispartofseriesAdvanced energy materialsen_US
dc.rights© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.en_US
dc.subjectDRNTU::Engineering::Materials::Energy materials
dc.titlePorosity-controlled TiNb2O7 microspheres with partial nitridation as a practical negative electrode for high-power lithium-ion batteriesen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.identifier.doihttp://dx.doi.org/10.1002/aenm.201401945


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