Hauptseite > Publikationsdatenbank > Analysis of the effects of different carbon coating strategies onstructure and electrochemical behavior of LiCoPO4 material as a high-voltage cathode electrode for lithium ion batteries > print

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024 7 _ |a 10.1016/j.electacta.2018.05.067
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024 7 _ |a 0013-4686
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024 7 _ |a 1873-3859
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100 1 _ |a Wu, Xiaochao
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245 _ _ |a Analysis of the effects of different carbon coating strategies onstructure and electrochemical behavior of LiCoPO4 material as a high-voltage cathode electrode for lithium ion batteries
260 _ _ |a New York, NY [u.a.]
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520 _ _ |a The olivine polymorph LiCoPO4 was synthesized by solvothermal and a subsequent annealing process. Carbon free, ex-situ carbon coated and in-situ carbon coated materials were prepared. With the addition of citric acid in the solvothermal reaction, a carbon layer was coated via an in-situ approach. To systematically compare the different carbon coating routes, the structure and morphology of the LiCoPO4 materials were investigated by XRD, Raman, and SEM. HAADF-STEM combined with EDX was applied to analyze the homogeneity of the carbon layer and corresponding antisite defects. Electrochemical properties were analyzed by half-cells measuring cyclic-voltammograms, charge/discharge cycling behavior stability and rate-capability. It was found that the in-situ carbon coated LiCoPO4/C exhibited a superior electrochemical performance due to the relatively uniform and complete surface-layer formation. As a result, an appropriate carbon layer improves the electronic and ionic transport properties, ensures fast electron-transfer kinetics at the electrode particle surfaces and suppresses unwanted side reactions with the electrolyte
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700 1 _ |a Rohman, F.
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700 1 _ |a Meledina, Maria
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700 1 _ |a Tempel, Hermann
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700 1 _ |a Schierholz, Roland
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700 1 _ |a Kungl, Hans
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700 1 _ |a Mayer, Joachim
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700 1 _ |a Eichel, Rüdiger-A.
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773 _ _ |a 10.1016/j.electacta.2018.05.067
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