Synthesis and characterization of LiFePO4/(C + Fe2P) composite cathodes

Hui Liu; Jingying Xie; Ke Wang

doi:10.1016/j.ssi.2008.01.065

Synthesis and characterization of LiFePO₄/(C + Fe₂P) composite cathodes

Hui Liu, Jingying Xie, Ke Wang

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

40 Scopus citations

Abstract

LiFePO₄/(C + Fe₂P) composite cathode with composite conductive webs structure was synthesized by modified carbothermal reduction method from the amorphous gel precursor at a heat-treatment temperature of 700 °C. The composite material exhibits an improved discharge capacity. Discharge capacities at 1 C rate were improved from 121.4 mAh g^{- 1} of LiFePO₄/C to 140.8 mAh g^{- 1} of LiFePO₄/(C + Fe₂P) composite materials synthesized by two different routes using the same gel precursor, which could be, at least in part, attributed to the improved conductivity through the in situ formed Fe₂P phase by the method. Electrochemical impedance measurements show that coexistence of the carbon and Fe₂P phase with LiFePO₄ could decrease the charge transfer resistance and increase surface electronic conductivity of the LiFePO₄/(C + Fe₂P) composite cathode.

Original language	English
Pages (from-to)	1768-1771
Number of pages	4
Journal	Solid State Ionics
Volume	179
Issue number	27-32
DOIs	https://doi.org/10.1016/j.ssi.2008.01.065
State	Published - 30 Sep 2008
Externally published	Yes

Keywords

Conductive webs
FeP
Li-ion batteries
LiFePO

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10.1016/j.ssi.2008.01.065

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abstract = "LiFePO4/(C + Fe2P) composite cathode with composite conductive webs structure was synthesized by modified carbothermal reduction method from the amorphous gel precursor at a heat-treatment temperature of 700 °C. The composite material exhibits an improved discharge capacity. Discharge capacities at 1 C rate were improved from 121.4 mAh g- 1 of LiFePO4/C to 140.8 mAh g- 1 of LiFePO4/(C + Fe2P) composite materials synthesized by two different routes using the same gel precursor, which could be, at least in part, attributed to the improved conductivity through the in situ formed Fe2P phase by the method. Electrochemical impedance measurements show that coexistence of the carbon and Fe2P phase with LiFePO4 could decrease the charge transfer resistance and increase surface electronic conductivity of the LiFePO4/(C + Fe2P) composite cathode.",

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T1 - Synthesis and characterization of LiFePO4/(C + Fe2P) composite cathodes

AU - Liu, Hui

AU - Xie, Jingying

AU - Wang, Ke

PY - 2008/9/30

Y1 - 2008/9/30

N2 - LiFePO4/(C + Fe2P) composite cathode with composite conductive webs structure was synthesized by modified carbothermal reduction method from the amorphous gel precursor at a heat-treatment temperature of 700 °C. The composite material exhibits an improved discharge capacity. Discharge capacities at 1 C rate were improved from 121.4 mAh g- 1 of LiFePO4/C to 140.8 mAh g- 1 of LiFePO4/(C + Fe2P) composite materials synthesized by two different routes using the same gel precursor, which could be, at least in part, attributed to the improved conductivity through the in situ formed Fe2P phase by the method. Electrochemical impedance measurements show that coexistence of the carbon and Fe2P phase with LiFePO4 could decrease the charge transfer resistance and increase surface electronic conductivity of the LiFePO4/(C + Fe2P) composite cathode.

AB - LiFePO4/(C + Fe2P) composite cathode with composite conductive webs structure was synthesized by modified carbothermal reduction method from the amorphous gel precursor at a heat-treatment temperature of 700 °C. The composite material exhibits an improved discharge capacity. Discharge capacities at 1 C rate were improved from 121.4 mAh g- 1 of LiFePO4/C to 140.8 mAh g- 1 of LiFePO4/(C + Fe2P) composite materials synthesized by two different routes using the same gel precursor, which could be, at least in part, attributed to the improved conductivity through the in situ formed Fe2P phase by the method. Electrochemical impedance measurements show that coexistence of the carbon and Fe2P phase with LiFePO4 could decrease the charge transfer resistance and increase surface electronic conductivity of the LiFePO4/(C + Fe2P) composite cathode.

KW - Conductive webs

KW - FeP

KW - Li-ion batteries

KW - LiFePO

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M3 - 文章

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SP - 1768

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JO - Solid State Ionics

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ER -

Synthesis and characterization of LiFePO₄/(C + Fe₂P) composite cathodes

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