Fabrication of High-Energy Li-Ion Cells with Li4Ti5O12 Microspheres as Anode and 0.5Li2MnO30.5LiNi0.4Co0.2Mn0.4O2 Microspheres as Cathode

In this work, we propose an effective way to prepare nanosized Li4Ti5O12 (LTO) microspheres and 0.5Li(2)MnO(3)0.5LiNi(0.4)Co(0.2)Mn(0.4)O(2) (NCM) microspheres by similar spray-drying methods. Both obtained materials are accumulated by primary nanoparticles and show a spherical morphology with particle distribution of 10-20m. The LTO microspheres deliver a tap density of 1.04gcm(-3), while the tap density of NCM microspheres is 2.07gcm(-3), which means an enhanced volumetric energy density. The as-prepared LTO microspheres have a reversible capacity of 170mAhg(-1) at 0.1C and a capacity retention of 97% after 250 cycles at 1C. The NCM microspheres have an initial discharge capacity of 270mAhg(-1) with a corresponding Coulombic efficiency of 88% at 0.03C. Both materials show a relatively good rate capability. The Li4Ti5O12/0.5Li(2)MnO(3)0.5LiNi(0.4)Co(0.2)Mn(0.4)O(2) cells deliver a high cathode specific capacity of 273mAhg(-1) and good initial Coulombic efficiency of 88% at 0.03C, and can be developed for powering hybrid and plug-in hybrid vehicles.