Preparation and characterization of electrospun LiFePO4/carbon complex improving rate performance at high C-rate

Preparation and characterization of electrospun LiFePO4/carbon complex improving rate performance... LiFePO4/carbon complexes were prepared by electrospinning to improve rate performance at high C-rate and their electrochemical properties were investigated to be used as a cathode active material for lithium ion battery. The LiFePO4/carbon complexes were prepared by the electrospinning method. The prepared samples were characterized by SEM, EDS, XRD, TGA, electrometer, and electrochemical analysis. The LiFePO4/carbon complexes prepared have a continuous structure with carbon-coated LiFePO4 and the LiFePO4 in LiFePO4/carbon complex has improved thermal stability from carbon coating. The conductivity of LiFePO4/carbon complex heat-treated at 800 °C is measured as 2.23 × 10−2 S cm−1, which is about 106–107 times more than that of raw LiFePO4. The capacity ratio of coin cell manufactured from raw LiFePO4 is 40%, whereas the capacity ratio of coin cell manufactured from LiFePO4/carbon complex heat-treated at 800 °C is 61% (10 C/0.1 C). The improved rate performance of LiFePO4/carbon complex heat-treated at 800 °C is due to the carbon coating and good electrical connection. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Preparation and characterization of electrospun LiFePO4/carbon complex improving rate performance at high C-rate

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Publisher
Springer Netherlands
Copyright
Copyright © 2010 by Springer Science+Business Media B.V.
Subject
Chemistry; Inorganic Chemistry ; Physical Chemistry ; Catalysis
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-010-0167-9
Publisher site
See Article on Publisher Site

Abstract

LiFePO4/carbon complexes were prepared by electrospinning to improve rate performance at high C-rate and their electrochemical properties were investigated to be used as a cathode active material for lithium ion battery. The LiFePO4/carbon complexes were prepared by the electrospinning method. The prepared samples were characterized by SEM, EDS, XRD, TGA, electrometer, and electrochemical analysis. The LiFePO4/carbon complexes prepared have a continuous structure with carbon-coated LiFePO4 and the LiFePO4 in LiFePO4/carbon complex has improved thermal stability from carbon coating. The conductivity of LiFePO4/carbon complex heat-treated at 800 °C is measured as 2.23 × 10−2 S cm−1, which is about 106–107 times more than that of raw LiFePO4. The capacity ratio of coin cell manufactured from raw LiFePO4 is 40%, whereas the capacity ratio of coin cell manufactured from LiFePO4/carbon complex heat-treated at 800 °C is 61% (10 C/0.1 C). The improved rate performance of LiFePO4/carbon complex heat-treated at 800 °C is due to the carbon coating and good electrical connection.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Sep 18, 2010

References

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