Improved rate capability of carbon coated Li3.9Sn0.1Ti5O12porous electrodes for Li-ion batteries

Biao Zhang; Zhen Dong Huang; Sei Woon Oh; Jang Kyo Kim

doi:10.1016/j.jpowsour.2011.08.114

Improved rate capability of carbon coated Li_3.9Sn_0.1Ti₅O₁₂porous electrodes for Li-ion batteries

Biao Zhang, Zhen Dong Huang, Sei Woon Oh, Jang Kyo Kim

Research output: Journal article publication › Journal article › Academic research › peer-review

97 Citations (Scopus)

Abstract

A new sol-gel process is developed to modify the Li4Ti5O12anode material for improved rate capability. The new process brings about the following effects, namely (i) doping of Sn2+to form Li3.9Sn0.1Ti5O12, (ii) carbon coating and (iii) creation of a porous structure. The doping of Sn2+results in the lattice distortion without changing the phase composition. A thin layer of amorphous carbon is coated on the doped particles that contain numerous nanopores. The rate capability of the anode material made from the modified powder is significantly improved when discharged at high current rates due to the reduced charge transfer resistance.

Original language	English
Pages (from-to)	10692-10697
Number of pages	6
Journal	Journal of Power Sources
Volume	196
Issue number	24
DOIs	https://doi.org/10.1016/j.jpowsour.2011.08.114
Publication status	Published - 15 Dec 2011
Externally published	Yes

Keywords

Anode
Doping
Li-ion batteries
Lithium titanate

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Energy Engineering and Power Technology
Physical and Theoretical Chemistry
Electrical and Electronic Engineering

UN SDGs

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

More information

10.1016/j.jpowsour.2011.08.114

Cite this

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title = "Improved rate capability of carbon coated Li3.9Sn0.1Ti5O12porous electrodes for Li-ion batteries",

abstract = "A new sol-gel process is developed to modify the Li4Ti5O12anode material for improved rate capability. The new process brings about the following effects, namely (i) doping of Sn2+to form Li3.9Sn0.1Ti5O12, (ii) carbon coating and (iii) creation of a porous structure. The doping of Sn2+results in the lattice distortion without changing the phase composition. A thin layer of amorphous carbon is coated on the doped particles that contain numerous nanopores. The rate capability of the anode material made from the modified powder is significantly improved when discharged at high current rates due to the reduced charge transfer resistance.",

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author = "Biao Zhang and Huang, {Zhen Dong} and Oh, {Sei Woon} and Kim, {Jang Kyo}",

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AU - Zhang, Biao

AU - Huang, Zhen Dong

AU - Oh, Sei Woon

AU - Kim, Jang Kyo

PY - 2011/12/15

Y1 - 2011/12/15

N2 - A new sol-gel process is developed to modify the Li4Ti5O12anode material for improved rate capability. The new process brings about the following effects, namely (i) doping of Sn2+to form Li3.9Sn0.1Ti5O12, (ii) carbon coating and (iii) creation of a porous structure. The doping of Sn2+results in the lattice distortion without changing the phase composition. A thin layer of amorphous carbon is coated on the doped particles that contain numerous nanopores. The rate capability of the anode material made from the modified powder is significantly improved when discharged at high current rates due to the reduced charge transfer resistance.

AB - A new sol-gel process is developed to modify the Li4Ti5O12anode material for improved rate capability. The new process brings about the following effects, namely (i) doping of Sn2+to form Li3.9Sn0.1Ti5O12, (ii) carbon coating and (iii) creation of a porous structure. The doping of Sn2+results in the lattice distortion without changing the phase composition. A thin layer of amorphous carbon is coated on the doped particles that contain numerous nanopores. The rate capability of the anode material made from the modified powder is significantly improved when discharged at high current rates due to the reduced charge transfer resistance.

KW - Anode

KW - Doping

KW - Li-ion batteries

KW - Lithium titanate

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EP - 10697

JO - Journal of Power Sources

JF - Journal of Power Sources

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