Investigation of olivine LiFePO4 cathode substitutted by magnesium at Li-site and Fe-site for secondary lithium ion batteries effects of the doping sites on the structures and the electrochemical performances

Chuan Wu; Ying Bai; Yuan Yuan Wei; Feng Wu; Yu Zhong

doi:10.1109/RSETE.2011.5965740

Investigation of olivine LiFePO₄ cathode substitutted by magnesium at Li-site and Fe-site for secondary lithium ion batteries effects of the doping sites on the structures and the electrochemical performances

Chuan Wu^*, Ying Bai, Yuan Yuan Wei, Feng Wu, Yu Zhong

^*Corresponding author for this work

School of Material Science and Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

Mg-substituted olivine LiFePO₄ at Li-site and Fe-site, namely, Li_0.98FeMg_0.02PO₄/C, LiFe_0.98Mg _0.02PO₄/C and Li_0.99Fe_0.99Mg _0.02PO₄/C, were synthesize via a two-step method with pre-heating. X-ray diffraction (XRD) patterns indicate all of the samples have pure olivine structures. Scanning electron microscopy (SEM) imply that the Li-site doping will lead to an anomalistic apparent morphology with a particle size in the range of 1-2μm; while the Fe-site doping will promote a spherelike morphology with a smaller particle size. At the current density of 0.2mA/cm², the initial specific discharge capacity of Li _0.98FeMg_0.02PO₄/C, LiFe_0.98Mg _0.02PO₄/C and Li_0.99Fe_0.99Mg _0.02PO₄/C are 106mAh/g, 123mAh/g and 112mAh/g, respectively. The cyclic voltammetry (CV) curves and the electrochemical impedance spectroscopy (EIS) profiles indicate that LiFe_0.98Mg _0.02PO₄/C has the best reversibility and the smallest charge transfer resistance, which are in favor of the good electrochemical performances.

Original language	English
Title of host publication	2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings
Pages	6072-6075
Number of pages	4
DOIs	https://doi.org/10.1109/RSETE.2011.5965740
Publication status	Published - 2011
Event	2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Nanjing, China Duration: 24 Jun 2011 → 26 Jun 2011

Publication series

Name	2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings

Conference

Conference	2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011
Country/Territory	China
City	Nanjing
Period	24/06/11 → 26/06/11

Keywords

Cathode
Doping
Electrochemical performance
Lithium ion battery
Metal-site
Olivine LiFePO

UN SDGs

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

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10.1109/RSETE.2011.5965740

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Wu, C., Bai, Y., Wei, Y. Y., Wu, F., & Zhong, Y. (2011). Investigation of olivine LiFePO₄ cathode substitutted by magnesium at Li-site and Fe-site for secondary lithium ion batteries effects of the doping sites on the structures and the electrochemical performances. In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings (pp. 6072-6075). Article 5965740 (2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings). https://doi.org/10.1109/RSETE.2011.5965740

Wu, Chuan ; Bai, Ying ; Wei, Yuan Yuan et al. / Investigation of olivine LiFePO₄ cathode substitutted by magnesium at Li-site and Fe-site for secondary lithium ion batteries effects of the doping sites on the structures and the electrochemical performances. 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings. 2011. pp. 6072-6075 (2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings).

@inproceedings{9af3e7599b304e969455067e0753159e,

title = "Investigation of olivine LiFePO4 cathode substitutted by magnesium at Li-site and Fe-site for secondary lithium ion batteries effects of the doping sites on the structures and the electrochemical performances",

abstract = "Mg-substituted olivine LiFePO4 at Li-site and Fe-site, namely, Li0.98FeMg0.02PO4/C, LiFe0.98Mg 0.02PO4/C and Li0.99Fe0.99Mg 0.02PO4/C, were synthesize via a two-step method with pre-heating. X-ray diffraction (XRD) patterns indicate all of the samples have pure olivine structures. Scanning electron microscopy (SEM) imply that the Li-site doping will lead to an anomalistic apparent morphology with a particle size in the range of 1-2μm; while the Fe-site doping will promote a spherelike morphology with a smaller particle size. At the current density of 0.2mA/cm2, the initial specific discharge capacity of Li 0.98FeMg0.02PO4/C, LiFe0.98Mg 0.02PO4/C and Li0.99Fe0.99Mg 0.02PO4/C are 106mAh/g, 123mAh/g and 112mAh/g, respectively. The cyclic voltammetry (CV) curves and the electrochemical impedance spectroscopy (EIS) profiles indicate that LiFe0.98Mg 0.02PO4/C has the best reversibility and the smallest charge transfer resistance, which are in favor of the good electrochemical performances.",

keywords = "Cathode, Doping, Electrochemical performance, Lithium ion battery, Metal-site, Olivine LiFePO",

author = "Chuan Wu and Ying Bai and Wei, {Yuan Yuan} and Feng Wu and Yu Zhong",

year = "2011",

doi = "10.1109/RSETE.2011.5965740",

language = "English",

isbn = "9781424491711",

series = "2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings",

pages = "6072--6075",

booktitle = "2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings",

note = "2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 ; Conference date: 24-06-2011 Through 26-06-2011",

}

Wu, C , Bai, Y, Wei, YY, Wu, F & Zhong, Y 2011, Investigation of olivine LiFePO₄ cathode substitutted by magnesium at Li-site and Fe-site for secondary lithium ion batteries effects of the doping sites on the structures and the electrochemical performances. in 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings., 5965740, 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings, pp. 6072-6075, 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011, Nanjing, China, 24/06/11. https://doi.org/10.1109/RSETE.2011.5965740

Investigation of olivine LiFePO₄ cathode substitutted by magnesium at Li-site and Fe-site for secondary lithium ion batteries effects of the doping sites on the structures and the electrochemical performances. / Wu, Chuan ; Bai, Ying; Wei, Yuan Yuan et al.
2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings. 2011. p. 6072-6075 5965740 (2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Investigation of olivine LiFePO4 cathode substitutted by magnesium at Li-site and Fe-site for secondary lithium ion batteries effects of the doping sites on the structures and the electrochemical performances

AU - Wu, Chuan

AU - Bai, Ying

AU - Wei, Yuan Yuan

AU - Wu, Feng

AU - Zhong, Yu

PY - 2011

Y1 - 2011

N2 - Mg-substituted olivine LiFePO4 at Li-site and Fe-site, namely, Li0.98FeMg0.02PO4/C, LiFe0.98Mg 0.02PO4/C and Li0.99Fe0.99Mg 0.02PO4/C, were synthesize via a two-step method with pre-heating. X-ray diffraction (XRD) patterns indicate all of the samples have pure olivine structures. Scanning electron microscopy (SEM) imply that the Li-site doping will lead to an anomalistic apparent morphology with a particle size in the range of 1-2μm; while the Fe-site doping will promote a spherelike morphology with a smaller particle size. At the current density of 0.2mA/cm2, the initial specific discharge capacity of Li 0.98FeMg0.02PO4/C, LiFe0.98Mg 0.02PO4/C and Li0.99Fe0.99Mg 0.02PO4/C are 106mAh/g, 123mAh/g and 112mAh/g, respectively. The cyclic voltammetry (CV) curves and the electrochemical impedance spectroscopy (EIS) profiles indicate that LiFe0.98Mg 0.02PO4/C has the best reversibility and the smallest charge transfer resistance, which are in favor of the good electrochemical performances.

AB - Mg-substituted olivine LiFePO4 at Li-site and Fe-site, namely, Li0.98FeMg0.02PO4/C, LiFe0.98Mg 0.02PO4/C and Li0.99Fe0.99Mg 0.02PO4/C, were synthesize via a two-step method with pre-heating. X-ray diffraction (XRD) patterns indicate all of the samples have pure olivine structures. Scanning electron microscopy (SEM) imply that the Li-site doping will lead to an anomalistic apparent morphology with a particle size in the range of 1-2μm; while the Fe-site doping will promote a spherelike morphology with a smaller particle size. At the current density of 0.2mA/cm2, the initial specific discharge capacity of Li 0.98FeMg0.02PO4/C, LiFe0.98Mg 0.02PO4/C and Li0.99Fe0.99Mg 0.02PO4/C are 106mAh/g, 123mAh/g and 112mAh/g, respectively. The cyclic voltammetry (CV) curves and the electrochemical impedance spectroscopy (EIS) profiles indicate that LiFe0.98Mg 0.02PO4/C has the best reversibility and the smallest charge transfer resistance, which are in favor of the good electrochemical performances.

KW - Cathode

KW - Doping

KW - Electrochemical performance

KW - Lithium ion battery

KW - Metal-site

KW - Olivine LiFePO

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U2 - 10.1109/RSETE.2011.5965740

DO - 10.1109/RSETE.2011.5965740

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AN - SCOPUS:80052257774

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T3 - 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings

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BT - 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings

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Wu C , Bai Y, Wei YY, Wu F, Zhong Y. Investigation of olivine LiFePO₄ cathode substitutted by magnesium at Li-site and Fe-site for secondary lithium ion batteries effects of the doping sites on the structures and the electrochemical performances. In 2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings. 2011. p. 6072-6075. 5965740. (2011 International Conference on Remote Sensing, Environment and Transportation Engineering, RSETE 2011 - Proceedings). doi: 10.1109/RSETE.2011.5965740