Tailoring high-surface-area nanocrystalline TiO2 polymorphs for high-power Li ion battery electrodes

Yun Ho Jin; Seung Hun Lee; Hyun Woo Shim; Kyung Hyun Ko; Dong Wan Kim

doi:10.1016/j.electacta.2010.07.027

Tailoring high-surface-area nanocrystalline TiO₂ polymorphs for high-power Li ion battery electrodes

Yun Ho Jin, Seung Hun Lee, Hyun Woo Shim, Kyung Hyun Ko, Dong Wan Kim

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

The crystallization and morphology of brookite and anatase titania (TiO₂) were controlled using the urea-mediated hydrolysis/ precipitation route in the presence of the Ti³⁺ ions. Without the strong complexing agents and the non-hydrothermal conditions, simple alterations to the urea concentration led to the synthesis from brookite nanorods to anatase nanoflowers at a low temperature below 100 °C, whereas the BET specific surface area evolved from 102 to 268 m² g^-1, respectively. A possible formation mechanism was also proposed for these TiO₂ nanostructures. The excellent reversible capacity and rate capability were achieved for the anatase nanoflowers because of the small crystallite size and significantly large surface area.

Original language	English
Pages (from-to)	7315-7321
Number of pages	7
Journal	Electrochimica Acta
Volume	55
Issue number	24
DOIs	https://doi.org/10.1016/j.electacta.2010.07.027
Publication status	Published - 2010 Oct 1
Externally published	Yes

Bibliographical note

Funding Information:
This research was supported by Future-based Technology Development Program (Nano Fields) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2010-0019116 ).

Keywords

Anatase
Li-ion batteries
Nanostructures
Rate capability
TiO

ASJC Scopus subject areas

General Chemical Engineering
Electrochemistry

Access to Document

10.1016/j.electacta.2010.07.027

Cite this

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title = "Tailoring high-surface-area nanocrystalline TiO2 polymorphs for high-power Li ion battery electrodes",

abstract = "The crystallization and morphology of brookite and anatase titania (TiO2) were controlled using the urea-mediated hydrolysis/ precipitation route in the presence of the Ti3+ ions. Without the strong complexing agents and the non-hydrothermal conditions, simple alterations to the urea concentration led to the synthesis from brookite nanorods to anatase nanoflowers at a low temperature below 100 °C, whereas the BET specific surface area evolved from 102 to 268 m2 g-1, respectively. A possible formation mechanism was also proposed for these TiO2 nanostructures. The excellent reversible capacity and rate capability were achieved for the anatase nanoflowers because of the small crystallite size and significantly large surface area.",

keywords = "Anatase, Li-ion batteries, Nanostructures, Rate capability, TiO",

author = "Jin, {Yun Ho} and Lee, {Seung Hun} and Shim, {Hyun Woo} and Ko, {Kyung Hyun} and Kim, {Dong Wan}",

note = "Funding Information: This research was supported by Future-based Technology Development Program (Nano Fields) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2010-0019116 ).",

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AU - Jin, Yun Ho

AU - Lee, Seung Hun

AU - Shim, Hyun Woo

AU - Ko, Kyung Hyun

AU - Kim, Dong Wan

N1 - Funding Information: This research was supported by Future-based Technology Development Program (Nano Fields) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2010-0019116 ).

PY - 2010/10/1

Y1 - 2010/10/1

N2 - The crystallization and morphology of brookite and anatase titania (TiO2) were controlled using the urea-mediated hydrolysis/ precipitation route in the presence of the Ti3+ ions. Without the strong complexing agents and the non-hydrothermal conditions, simple alterations to the urea concentration led to the synthesis from brookite nanorods to anatase nanoflowers at a low temperature below 100 °C, whereas the BET specific surface area evolved from 102 to 268 m2 g-1, respectively. A possible formation mechanism was also proposed for these TiO2 nanostructures. The excellent reversible capacity and rate capability were achieved for the anatase nanoflowers because of the small crystallite size and significantly large surface area.

AB - The crystallization and morphology of brookite and anatase titania (TiO2) were controlled using the urea-mediated hydrolysis/ precipitation route in the presence of the Ti3+ ions. Without the strong complexing agents and the non-hydrothermal conditions, simple alterations to the urea concentration led to the synthesis from brookite nanorods to anatase nanoflowers at a low temperature below 100 °C, whereas the BET specific surface area evolved from 102 to 268 m2 g-1, respectively. A possible formation mechanism was also proposed for these TiO2 nanostructures. The excellent reversible capacity and rate capability were achieved for the anatase nanoflowers because of the small crystallite size and significantly large surface area.

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KW - Rate capability

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