The electrochemical performance of the layered Li(Ni13/Co13/Mn13/)O2 material have been investigated as a promising cathode for a hybrid electric vehicle (HEV) application. A C/Li(Ni13/Co13/Mn13/)O2 cell, cycled between 2.9 and 4.1 V at 1.5 C rate, does not show any sign of capacity fade up to 100 cycles, whereas at the 5 C rate, a loss of only 18% of capacity is observed after 200 cycles. The Li(Ni13/Co13/Mn13/)O2 host cathode converts from the hexagonal to a monoclinic symmetry at high state of charge. The cell pulse power capability on charge and discharge were found to exceed the requirement for powering a hybrid HEV. The accelerated calendar life tests performed on C/Li(Ni13/Co13/Mn13/)O2 cells charged at 4.1 V and stored at 50 degrees C have shown a limited area specific impedance (ASI) increase unlike C/Li(Ni0.8Co0.2) based-cells. A differential scanning calorimetry (DSC) comparative study clearly showed that the thermal stability of Li(Ni13/Co13/Mn13/)O2 is much better than that of Li(Ni0.8Co0.2)O2 and Li(Ni0.8Co0.15Al0.05)O2 cathodes. Also, DSC data of Li(Ni13/Co13/Mn13/)O2 cathode charged at 4.1, 4.3, and 4.6 V are presented and their corresponding exothermic heat flow peaks are discussed.


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    Title :

    Li(Ni13/Co13/Mn13/)O2 as a suitable cathode for high power applications


    Contributors:
    Belharouak, I. (author) / Sun, Y.K. (author) / Liu, J. (author) / Amine, K. (author)

    Published in:

    Journal of Power Sources ; 123 , 2 ; 247-252


    Publication date :

    2003


    Size :

    6 Seiten, 15 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English






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