Electrochemical Characteristics of Ru Added Li4Ti5O12as an Anode Material

There is an increasing interest in the development of rechargeable batteries suitable for use in both hybrid electric vehicles and energy storage systems that require higher charge & discharge rates, bigger battery sizes and increased safety of the batteries. Spinel-type lithium titanium oxide (Li4Ti5O12) as a potential anode for lithium ion batteries has many advantages. It is a zero-strain materials and it experiences no structural change during the charge/discharge precess. Thus, it has long cycle life due to its structural integrity. It also offers a stable operation voltage of approximately 1.55 V versus Li + /Li, above the reduction potential of most organic electrolyte. In this study, Ru added Li4Ti5O12 composites were synthesized by solid state process. The characteristics of active material were investigated with TGA-DTA, XRD, SEM and charge/discharge test. The capacity was reduced when Ru was added, however, the polarization decreased. The capacity rate of Li4Ti5O12 with Ru (3%, 4%) addition was reduced during the charge/discharge precess with 10 C-rate as a high current density.