Improved rate capability of carbon coated Li3.9Sn 0.1Ti5O12 porous 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 _0.1Ti₅O₁₂ porous electrodes for Li-ion batteries

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

Mechanical & Nuclear Engineering

The Hong Kong University of Science and Technology

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

98 Scopus citations

Abstract

A new sol-gel process is developed to modify the Li₄Ti ₅O₁₂ anode material for improved rate capability. The new process brings about the following effects, namely (i) doping of Sn²⁺ to form Li_3.9Sn_0.1Ti₅O₁₂, (ii) carbon coating and (iii) creation of a porous structure. The doping of Sn ²⁺ 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	British 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
State	Published - 15 Dec 2011

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Anode
Doping
Li-ion batteries
Lithium titanate

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Cite this

@article{2040c6673bd8410d81e64dd8e30754e7,

title = "Improved rate capability of carbon coated Li3.9Sn 0.1Ti5O12 porous electrodes for Li-ion batteries",

abstract = "A new sol-gel process is developed to modify the Li4Ti 5O12 anode 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 Sn 2+ 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.",

keywords = "Anode, Doping, Li-ion batteries, Lithium titanate",

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

note = "Funding Information: This project was supported by the Research Grants Council (Project code: 614010, 613811) and the Innovation and Technology Fund (Project code: GHP/028/08SZ) of Hong Kong SAR. The authors also appreciate the technical assistance from the Materials Characterization and Preparation Facilities (MCPF) of HKUST. BZ, ZDH and SWO are supported partly by the Postgraduate Scholarship through the Nanoscience and Technology Program of the School of Engineering, HKUST.",

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AU - Zhang, Biao

AU - Huang, Zhen Dong

AU - Oh, Sei Woon

AU - Kim, Jang Kyo

N1 - Funding Information: This project was supported by the Research Grants Council (Project code: 614010, 613811) and the Innovation and Technology Fund (Project code: GHP/028/08SZ) of Hong Kong SAR. The authors also appreciate the technical assistance from the Materials Characterization and Preparation Facilities (MCPF) of HKUST. BZ, ZDH and SWO are supported partly by the Postgraduate Scholarship through the Nanoscience and Technology Program of the School of Engineering, HKUST.

PY - 2011/12/15

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N2 - A new sol-gel process is developed to modify the Li4Ti 5O12 anode 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 Sn 2+ 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 Li4Ti 5O12 anode 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 Sn 2+ 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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