Lithium titanate battery suffers from high capacity fade for elevated temperature operation. In order to gain new insights into the underlying degradation mechanism of this problem, Li4Ti5O12/LiCoO2 battery with 8Ah capacity was assembled and its storage and cycling performance at 60°C were investigated. Electrochemical impedance spectroscopy (EIS) of cells during cycling were measured with two-electrode and three-electrode 8Ah pouch cells. XRD, SEM and half-cell characterization of the cycled cells were analyzed. Accelerating Rate Calorimeter was used to monitor the battery surface temperature during cycling at 60° and 3C rate. The results showed that the capacity fade of this cell was mainly caused by degradation of LiCoO2 cathode.


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    Titel :

    Capacity fading mechanism of large scale Li4Ti5O12/LiCoO2 battery


    Beteiligte:
    Ke Wu, (Autor:in) / Ya Gao, (Autor:in) / Xiaoman Sun, (Autor:in) / Sha Liu, (Autor:in) / Ningning Wu, (Autor:in) / Hailei Zhao, (Autor:in) / Yingchun Zhang, (Autor:in)


    Erscheinungsdatum :

    2014-08-01


    Format / Umfang :

    1119693 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch