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- W1602090216 abstract "Pure lithium iron phosphate (<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>) and carbon-coated<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>(C-<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>) cathode materials were synthesized for Li-ion batteries. Structural and electrochemical properties of these materials were compared. X-ray diffraction revealed orthorhombic olivine structure. Micro-Raman scattering analysis indicates amorphous carbon, and TEM micrographs show carbon coating on<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>particles. Ex situ Raman spectrum of C-<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>at various stages of charging and discharging showed reversibility upon electrochemical cycling. The cyclic voltammograms of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>and C-<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>showed only a pair of peaks corresponding to the anodic and cathodic reactions. The first discharge capacities were 63, 43, and 13 mAh/g for C/5, C/3, and C/2, respectively for<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>where as in case of C-<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>that were 163, 144, 118, and 70 mAh/g for C/5, C/3, C/2, and 1C, respectively. The capacity retention of pure<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>was 69% after 25 cycles where as that of C-<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mn>4</mml:mn></mml:msub></mml:math>was around 97% after 50 cycles. These results indicate that the capacity and the rate capability improved significantly upon carbon coating." @default.
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- W1602090216 date "2009-01-01" @default.
- W1602090216 modified "2023-10-14" @default.
- W1602090216 title "Structural and Electrochemical Characterization of Pure<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mtext>4</mml:mtext></mml:msub></mml:math>and Nanocomposite C-<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:msub><mml:mtext>LiFePO</mml:mtext><mml:mtext>4</mml:mtext></mml:msub></mml:math>Cathodes for Lithium Ion Rechargeable Batteries" @default.
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- W1602090216 doi "https://doi.org/10.1155/2009/176517" @default.
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