Sub-micrometric LiCr0.2Ni0.4Mn1.4O4 spinel as 5 V-cathode material exhibiting huge rate capability at 25 and 55 °C

Single phase LiCr0.2Ni0.4Mn1.4O4 spinel has been synthesized by a simple sucrose assisted combustion method that yields highly crystalline homogeneous sub-micrometric samples (650 nm). The LiCr0.2Ni0.4Mn1.4O4, with capacity retention of 92% at 60 C discharge rate, shows the highest rate capability among LiNi0.5Mn1.5O4-type cathodes. It delivers very high-power (34.8 kW kg−1 at 60 C). Studies developed at 55 °C demonstrate that LiCr0.2Ni0.4Mn1.4O4 retains huge rate capability and large cycleability at high temperature.