Synthesis and electrochemical characterization of 2D nanostructured Li 4Ti 5O 12 with lithium electrode functionality

Song Yi Han; In Young Kim; Seong Ju Hwang

doi:10.1016/j.jpcs.2011.10.044

Synthesis and electrochemical characterization of 2D nanostructured Li ₄Ti ₅O ₁₂ with lithium electrode functionality

Song Yi Han, In Young Kim, Seong Ju Hwang

Department of Chemistry & Nanoscience

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

16 Scopus citations

Abstract

Two-dimensional (2D) Li ₄Ti ₅O ₁₂ nanosheets with cubic spinel structure are synthesized via a lithiation process of exfoliated titanate 2D nanosheets and the subsequent heat-treatment at elevated temperatures. According to powder X-ray diffraction and field emission-scanning electron microscopy analysis, the obtained lithium titanium oxides show well-developed Bragg reflections of cubic spinel-structured Li ₄Ti ₅O ₁₂ phase and highly anisotropic 2D plate-like morphology. Ti K-edge X-ray absorption near-edge structure analysis reveals the stabilization of tetravalent titanium ions in the cubic spinel lattice of Li ₄Ti ₅O ₁₂. The 2D nanostructured Li ₄Ti ₅O ₁₂ materials display the electrochemical functionality as negative electrode for lithium secondary batteries. The most promising electrode performance is achieved by the heat-treatment of the lithiated titanate at 600 °C, highlighting the importance of heating temperature in optimizing the electrochemical property of the resulting materials.

Original language	English
Pages (from-to)	1444-1447
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	73
Issue number	12
DOIs	https://doi.org/10.1016/j.jpcs.2011.10.044
State	Published - Dec 2012

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) ( NRF-2010-C1AAA001-2010-0029065 ) and by National Research Foundation of Korea Grant funded by the Korean Government ( 2010-0001485 ). The experiments at Pohang Accelerator Laboratory (PAL) were supported in part by MOST and POSTECH. The authors are grateful to Prof. J. Cho (UNIST) for helping us to test the electrode performance.

Keywords

A. Nanostructures
A. Oxides
B. Chemical synthesis
D. Electrochemical properties
D. Phase transitions

Access to Document

10.1016/j.jpcs.2011.10.044

Cite this

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title = "Synthesis and electrochemical characterization of 2D nanostructured Li 4Ti 5O 12 with lithium electrode functionality",

abstract = "Two-dimensional (2D) Li 4Ti 5O 12 nanosheets with cubic spinel structure are synthesized via a lithiation process of exfoliated titanate 2D nanosheets and the subsequent heat-treatment at elevated temperatures. According to powder X-ray diffraction and field emission-scanning electron microscopy analysis, the obtained lithium titanium oxides show well-developed Bragg reflections of cubic spinel-structured Li 4Ti 5O 12 phase and highly anisotropic 2D plate-like morphology. Ti K-edge X-ray absorption near-edge structure analysis reveals the stabilization of tetravalent titanium ions in the cubic spinel lattice of Li 4Ti 5O 12. The 2D nanostructured Li 4Ti 5O 12 materials display the electrochemical functionality as negative electrode for lithium secondary batteries. The most promising electrode performance is achieved by the heat-treatment of the lithiated titanate at 600 °C, highlighting the importance of heating temperature in optimizing the electrochemical property of the resulting materials.",

keywords = "A. Nanostructures, A. Oxides, B. Chemical synthesis, D. Electrochemical properties, D. Phase transitions",

author = "Han, {Song Yi} and {Young Kim}, In and Hwang, {Seong Ju}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) ( NRF-2010-C1AAA001-2010-0029065 ) and by National Research Foundation of Korea Grant funded by the Korean Government ( 2010-0001485 ). The experiments at Pohang Accelerator Laboratory (PAL) were supported in part by MOST and POSTECH. The authors are grateful to Prof. J. Cho (UNIST) for helping us to test the electrode performance.",

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N2 - Two-dimensional (2D) Li 4Ti 5O 12 nanosheets with cubic spinel structure are synthesized via a lithiation process of exfoliated titanate 2D nanosheets and the subsequent heat-treatment at elevated temperatures. According to powder X-ray diffraction and field emission-scanning electron microscopy analysis, the obtained lithium titanium oxides show well-developed Bragg reflections of cubic spinel-structured Li 4Ti 5O 12 phase and highly anisotropic 2D plate-like morphology. Ti K-edge X-ray absorption near-edge structure analysis reveals the stabilization of tetravalent titanium ions in the cubic spinel lattice of Li 4Ti 5O 12. The 2D nanostructured Li 4Ti 5O 12 materials display the electrochemical functionality as negative electrode for lithium secondary batteries. The most promising electrode performance is achieved by the heat-treatment of the lithiated titanate at 600 °C, highlighting the importance of heating temperature in optimizing the electrochemical property of the resulting materials.

AB - Two-dimensional (2D) Li 4Ti 5O 12 nanosheets with cubic spinel structure are synthesized via a lithiation process of exfoliated titanate 2D nanosheets and the subsequent heat-treatment at elevated temperatures. According to powder X-ray diffraction and field emission-scanning electron microscopy analysis, the obtained lithium titanium oxides show well-developed Bragg reflections of cubic spinel-structured Li 4Ti 5O 12 phase and highly anisotropic 2D plate-like morphology. Ti K-edge X-ray absorption near-edge structure analysis reveals the stabilization of tetravalent titanium ions in the cubic spinel lattice of Li 4Ti 5O 12. The 2D nanostructured Li 4Ti 5O 12 materials display the electrochemical functionality as negative electrode for lithium secondary batteries. The most promising electrode performance is achieved by the heat-treatment of the lithiated titanate at 600 °C, highlighting the importance of heating temperature in optimizing the electrochemical property of the resulting materials.

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