An in situ synthesis method for carbon-coated LiFePO4 powders has been investigated in detail using inexpensive FePO4 as an iron source and polypropylene as a reductive agent and carbon source. Thermogravimetric and differential thermal analysis of the precursor mixture indicated that the pyrolysis of polypropylene and the combination reaction of LiFePO4 could be processed synchronously at a synthesis temperature between 500 and 800 degrees C. X-ray diffraction analyses and scanning electron microscopy observations showed that LiFePO4/C composites with fine particle sizes and homogeneous carbon coating could be directly synthesized by the in situ method. The electrochemical performances of the carbon-coated LiFePO4 powder synthesized at 700 degrees C were evaluated using an electrochemical model cell by galvanostatic charge/discharge and cyclic voltammetry measurements. The in situ synthesized LiFePO4/C composite had a high electrochemical capacity of 164 mA h g(-1) at the 0.1C rate, and possessed a favorable capacity cycling maintenance at the 0.3 and 0.5C rates. The good electrochemical properties of the LiFePO4/C composite are suggested to originate from the good crystallinity, the fine particle sizes, and the efficient electronic conductive coating layer of the material. (c) 2005 The Electrochemical Society.
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
Arnold, G
Garche, J
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
Garche, J
Hemmer, R
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
Hemmer, R
Ströbele, S
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
Ströbele, S
Vogler, C
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
Vogler, C
Wohlfahrt-Mehrens, A
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
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Commissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, FranceCommissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, France
Franger, S
Le Cras, F
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Commissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, FranceCommissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, France
Le Cras, F
Bourbon, C
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Commissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, FranceCommissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, France
Bourbon, C
Rouault, H
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Commissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, FranceCommissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, France
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
Arnold, G
Garche, J
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
Garche, J
Hemmer, R
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
Hemmer, R
Ströbele, S
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
Ströbele, S
Vogler, C
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
Vogler, C
Wohlfahrt-Mehrens, A
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Ctr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, GermanyCtr Solar Energy & Hydrogen Res, Baden Wurttemberg Div 3, D-89081 Ulm, Germany
机构:
Commissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, FranceCommissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, France
Franger, S
Le Cras, F
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h-index: 0
机构:
Commissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, FranceCommissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, France
Le Cras, F
Bourbon, C
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h-index: 0
机构:
Commissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, FranceCommissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, France
Bourbon, C
Rouault, H
论文数: 0引用数: 0
h-index: 0
机构:
Commissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, FranceCommissariat Energie Atom, Direct Technol Res, Lab Small Power Sources, F-38054 Grenoble, France