Synthesis of lithium titanium oxide (Li4Ti5O12) with ultrathin carbon layer using supercritical fluids for anode materials in lithium batteries

Seung Ah Hong; Sue Bin Lee; Oh Sim Joo; Jeong Won Kang; Byung Won Cho; Jong Sung Lim

doi:10.1007/s10853-016-9920-9

Synthesis of lithium titanium oxide (Li₄Ti₅O₁₂) with ultrathin carbon layer using supercritical fluids for anode materials in lithium batteries

Seung Ah Hong, Sue Bin Lee, Oh Sim Joo, Jeong Won Kang, Byung Won Cho, Jong Sung Lim

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

14 Citations (Scopus)

Abstract

Lithium titanium oxide (LTO: Li₄Ti₅O₁₂) particles were produced via a continuous supercritical fluid process for use as anodes in lithium ion batteries. The synthesized LTO particles in supercritical water (scH₂O) or in supercritical methanol (scMeOH) generate nanoparticles of 10–30 nm sizes, and the modified LTO particles using oleylamine in scMeOH affects the inhibition of particle growth. The modified LTO particle was coated by the usage of supercritical carbon dioxide (scCO₂) and polyethylene glycol (PEG-400). The conformal coverage of the carbon layer on LTO particles with a thickness of 1.2 nm, and a uniform distribution of carbon on the entire surface of LTO particles are confirmed. The modified and carbon-coated LTO with a carbon content of 5.3 wt% exhibits a high discharge capacity of 175 mAh/g (which approaches the theoretical value of LTO) at 0.1 C and 83 mAh/g at 50 C. The carbon-coated LTO prepared using supercritical fluids delivered 160, 153, 123 mAh/g at 1 C and 60 °C, room temperature, and −25 °C, respectively.

Original language	English
Pages (from-to)	6220-6234
Number of pages	15
Journal	Journal of Materials Science
Volume	51
Issue number	13
DOIs	https://doi.org/10.1007/s10853-016-9920-9
Publication status	Published - 2016 Jul 1

Bibliographical note

Funding Information:
This study was financially supported by Korea Institute of Energy Technology Evaluation and Planning (20122020100280). Additionally, this research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2014R1A5A1009799).

Publisher Copyright:
© 2016, Springer Science+Business Media New York.

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/s10853-016-9920-9

Cite this

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title = "Synthesis of lithium titanium oxide (Li4Ti5O12) with ultrathin carbon layer using supercritical fluids for anode materials in lithium batteries",

abstract = "Lithium titanium oxide (LTO: Li4Ti5O12) particles were produced via a continuous supercritical fluid process for use as anodes in lithium ion batteries. The synthesized LTO particles in supercritical water (scH2O) or in supercritical methanol (scMeOH) generate nanoparticles of 10–30 nm sizes, and the modified LTO particles using oleylamine in scMeOH affects the inhibition of particle growth. The modified LTO particle was coated by the usage of supercritical carbon dioxide (scCO2) and polyethylene glycol (PEG-400). The conformal coverage of the carbon layer on LTO particles with a thickness of 1.2 nm, and a uniform distribution of carbon on the entire surface of LTO particles are confirmed. The modified and carbon-coated LTO with a carbon content of 5.3 wt% exhibits a high discharge capacity of 175 mAh/g (which approaches the theoretical value of LTO) at 0.1 C and 83 mAh/g at 50 C. The carbon-coated LTO prepared using supercritical fluids delivered 160, 153, 123 mAh/g at 1 C and 60 °C, room temperature, and −25 °C, respectively.",

author = "Hong, {Seung Ah} and Lee, {Sue Bin} and Joo, {Oh Sim} and Kang, {Jeong Won} and Cho, {Byung Won} and Lim, {Jong Sung}",

note = "Funding Information: This study was financially supported by Korea Institute of Energy Technology Evaluation and Planning (20122020100280). Additionally, this research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2014R1A5A1009799). Publisher Copyright: {\textcopyright} 2016, Springer Science+Business Media New York.",

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AU - Hong, Seung Ah

AU - Lee, Sue Bin

AU - Joo, Oh Sim

AU - Kang, Jeong Won

AU - Cho, Byung Won

AU - Lim, Jong Sung

N1 - Funding Information: This study was financially supported by Korea Institute of Energy Technology Evaluation and Planning (20122020100280). Additionally, this research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (No. 2014R1A5A1009799). Publisher Copyright: © 2016, Springer Science+Business Media New York.

PY - 2016/7/1

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N2 - Lithium titanium oxide (LTO: Li4Ti5O12) particles were produced via a continuous supercritical fluid process for use as anodes in lithium ion batteries. The synthesized LTO particles in supercritical water (scH2O) or in supercritical methanol (scMeOH) generate nanoparticles of 10–30 nm sizes, and the modified LTO particles using oleylamine in scMeOH affects the inhibition of particle growth. The modified LTO particle was coated by the usage of supercritical carbon dioxide (scCO2) and polyethylene glycol (PEG-400). The conformal coverage of the carbon layer on LTO particles with a thickness of 1.2 nm, and a uniform distribution of carbon on the entire surface of LTO particles are confirmed. The modified and carbon-coated LTO with a carbon content of 5.3 wt% exhibits a high discharge capacity of 175 mAh/g (which approaches the theoretical value of LTO) at 0.1 C and 83 mAh/g at 50 C. The carbon-coated LTO prepared using supercritical fluids delivered 160, 153, 123 mAh/g at 1 C and 60 °C, room temperature, and −25 °C, respectively.

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