Effects of Fe doping on the electrochemical performance of LiCoPO4/C composites for high power-density cathode materials

Dong Wook Han; Yong Mook Kang; Ri Zhu Yin; Min Sang Song; Hyuk Sang Kwon

doi:10.1016/j.elecom.2008.10.052

Effects of Fe doping on the electrochemical performance of LiCoPO₄/C composites for high power-density cathode materials

Dong Wook Han, Yong Mook Kang, Ri Zhu Yin, Min Sang Song, Hyuk Sang Kwon

Dept. of Future Energy Convergence

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

123 Scopus citations

Abstract

LiCo_1-xFe_xPO₄/C composites with various amounts of Fe (x = 0, 0.05 and 0.1) were synthesized by vibrant type ball-milling coupled with microwave heating to investigate the role of doped Fe²⁺ in LiCo_1-xFe_xPO₄/C composites. The initial charge-discharge curves and cyclic voltammetry profiles of LiCo_1-xFe_xPO₄/C composites apparently featured an improved kinetic property compared to LiCoPO₄. It was observed that the initial discharge capacity (120 mA hg^-1) of LiCo_0.95Fe_0.05PO₄ is higher than that (108 mA hg^-1) of LiCoPO₄ and the difference between the oxidation-reduction peaks is getting smaller with the increase of Fe doping. The electrochemical improvement in LiCo_1-xFe_xPO₄/C composites could be attributed to the enhanced Li⁺ diffusivity induced by the enlargement of 1D channel in polyanion structure of LiCoPO₄.

Original language	English
Pages (from-to)	137-140
Number of pages	4
Journal	Electrochemistry Communications
Volume	11
Issue number	1
DOIs	https://doi.org/10.1016/j.elecom.2008.10.052
State	Published - Jan 2009

Keywords

Fe doping
High power-density Li-ion battery
LiCoPO
Microwave heating
Olivine

UN SDGs

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

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10.1016/j.elecom.2008.10.052

Cite this

@article{ec6f1967bc9e4eea99505b1b6064fd7e,

title = "Effects of Fe doping on the electrochemical performance of LiCoPO4/C composites for high power-density cathode materials",

abstract = "LiCo1-xFexPO4/C composites with various amounts of Fe (x = 0, 0.05 and 0.1) were synthesized by vibrant type ball-milling coupled with microwave heating to investigate the role of doped Fe2+ in LiCo1-xFexPO4/C composites. The initial charge-discharge curves and cyclic voltammetry profiles of LiCo1-xFexPO4/C composites apparently featured an improved kinetic property compared to LiCoPO4. It was observed that the initial discharge capacity (120 mA hg-1) of LiCo0.95Fe0.05PO4 is higher than that (108 mA hg-1) of LiCoPO4 and the difference between the oxidation-reduction peaks is getting smaller with the increase of Fe doping. The electrochemical improvement in LiCo1-xFexPO4/C composites could be attributed to the enhanced Li+ diffusivity induced by the enlargement of 1D channel in polyanion structure of LiCoPO4.",

keywords = "Fe doping, High power-density Li-ion battery, LiCoPO, Microwave heating, Olivine",

author = "Han, \{Dong Wook\} and Kang, \{Yong Mook\} and Yin, \{Ri Zhu\} and Song, \{Min Sang\} and Kwon, \{Hyuk Sang\}",

year = "2009",

month = jan,

doi = "10.1016/j.elecom.2008.10.052",

language = "English",

volume = "11",

pages = "137--140",

journal = "Electrochemistry Communications",

issn = "1388-2481",

number = "1",

}

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T1 - Effects of Fe doping on the electrochemical performance of LiCoPO4/C composites for high power-density cathode materials

AU - Han, Dong Wook

AU - Kang, Yong Mook

AU - Yin, Ri Zhu

AU - Song, Min Sang

AU - Kwon, Hyuk Sang

PY - 2009/1

Y1 - 2009/1

N2 - LiCo1-xFexPO4/C composites with various amounts of Fe (x = 0, 0.05 and 0.1) were synthesized by vibrant type ball-milling coupled with microwave heating to investigate the role of doped Fe2+ in LiCo1-xFexPO4/C composites. The initial charge-discharge curves and cyclic voltammetry profiles of LiCo1-xFexPO4/C composites apparently featured an improved kinetic property compared to LiCoPO4. It was observed that the initial discharge capacity (120 mA hg-1) of LiCo0.95Fe0.05PO4 is higher than that (108 mA hg-1) of LiCoPO4 and the difference between the oxidation-reduction peaks is getting smaller with the increase of Fe doping. The electrochemical improvement in LiCo1-xFexPO4/C composites could be attributed to the enhanced Li+ diffusivity induced by the enlargement of 1D channel in polyanion structure of LiCoPO4.

AB - LiCo1-xFexPO4/C composites with various amounts of Fe (x = 0, 0.05 and 0.1) were synthesized by vibrant type ball-milling coupled with microwave heating to investigate the role of doped Fe2+ in LiCo1-xFexPO4/C composites. The initial charge-discharge curves and cyclic voltammetry profiles of LiCo1-xFexPO4/C composites apparently featured an improved kinetic property compared to LiCoPO4. It was observed that the initial discharge capacity (120 mA hg-1) of LiCo0.95Fe0.05PO4 is higher than that (108 mA hg-1) of LiCoPO4 and the difference between the oxidation-reduction peaks is getting smaller with the increase of Fe doping. The electrochemical improvement in LiCo1-xFexPO4/C composites could be attributed to the enhanced Li+ diffusivity induced by the enlargement of 1D channel in polyanion structure of LiCoPO4.

KW - Fe doping

KW - High power-density Li-ion battery

KW - LiCoPO

KW - Microwave heating

KW - Olivine

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JO - Electrochemistry Communications

JF - Electrochemistry Communications

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