Hierarchical Nanotube-Constructed Porous TiO2-B Spheres for High Performance Lithium Ion Batteries

Yi Cai, Hong En Wang, Shao Zhuan Huang, Jun Jin, Chao Wang, Yong Yu, Yu Li, Bao Lian Su

Résultats de recherche: Contribution à un journal/une revueArticle

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Résumé

Hierarchically structured porous TiO2-B spheres have been synthesized via a hydrothermal process using amorphous titania/oleylamine composites as a self-sacrificing template. The TiO2-B spheres are constructed by interconnected nanotubes and possess a high specific surface area of 295 m 2 g -1. When evaluated as an anode material in lithium-half cells, the as-obtained TiO2-B material exhibits high and reversible lithium storage capacity of 270 mA h g -1 at 1 C (340 mA g -1), excellent rate capability of 221 mA h g -1 at 10 C, and long cycle life with over 70% capacity retention after 1000 cycles at 10 C. The superior electrochemical performance of TiO2-B material strongly correlates to the synergetic superiorities with a combination of TiO2-B polymorph, hierarchically porous structure, interconnected nanotubes and spherical morphology. Post-mortem structural analyses reveal some discrete cubic LiTiO2 nanodots formed on the outer surfaces of TiO2-B nanotubes, which might account for the slight capacity loss upon prolonged electrochemical cycling.

langue originaleAnglais
Numéro d'article11557
journalScientific Reports
Volume5
Les DOIs
étatPublié - 14 juil. 2015

Empreinte digitale

Nanotubes
Lithium
Polymorphism
Specific surface area
Life cycle
Anodes
Composite materials
Lithium-ion batteries
titanium dioxide
oleylamine

Citer ceci

Cai, Yi ; Wang, Hong En ; Huang, Shao Zhuan ; Jin, Jun ; Wang, Chao ; Yu, Yong ; Li, Yu ; Su, Bao Lian. / Hierarchical Nanotube-Constructed Porous TiO2-B Spheres for High Performance Lithium Ion Batteries. Dans: Scientific Reports. 2015 ; Vol 5.
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abstract = "Hierarchically structured porous TiO2-B spheres have been synthesized via a hydrothermal process using amorphous titania/oleylamine composites as a self-sacrificing template. The TiO2-B spheres are constructed by interconnected nanotubes and possess a high specific surface area of 295 m 2 g -1. When evaluated as an anode material in lithium-half cells, the as-obtained TiO2-B material exhibits high and reversible lithium storage capacity of 270 mA h g -1 at 1 C (340 mA g -1), excellent rate capability of 221 mA h g -1 at 10 C, and long cycle life with over 70{\%} capacity retention after 1000 cycles at 10 C. The superior electrochemical performance of TiO2-B material strongly correlates to the synergetic superiorities with a combination of TiO2-B polymorph, hierarchically porous structure, interconnected nanotubes and spherical morphology. Post-mortem structural analyses reveal some discrete cubic LiTiO2 nanodots formed on the outer surfaces of TiO2-B nanotubes, which might account for the slight capacity loss upon prolonged electrochemical cycling.",
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Hierarchical Nanotube-Constructed Porous TiO2-B Spheres for High Performance Lithium Ion Batteries. / Cai, Yi; Wang, Hong En; Huang, Shao Zhuan; Jin, Jun; Wang, Chao; Yu, Yong; Li, Yu; Su, Bao Lian.

Dans: Scientific Reports, Vol 5, 11557, 14.07.2015.

Résultats de recherche: Contribution à un journal/une revueArticle

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