Li1.233Mo0.467Fe0.3O2 as an advanced cathode material for high-performance lithium ion battery

Li-rich layered transition metal oxides show high reversible capacity in rechargeable lithium-ion batteries, as represented by the Li1.2Ni0.13Co0.13Mn0.54O2. However, it suffers from severe problems in practical applications such as voltage fading, poor cycle life and poor rate performance. Here, we reported a Li-rich layered oxide Li1.233Mo0.467Fe0.3O2 showing high reversible specific capacity of 262.9 mA h/g at the initial cycle and then up to 305.4 mA h/g after several cycles. The material shows decent capacity retention that after 25 cycles it still sustained a value of 257.8 mAh/g at the charge/discharge voltage range of 1.0-4.3 V. It is noticed that the capacity increase at 2.5 V platform is attributed to structural rearrangement at lower potential. The present work suggests choosing appropriate constituent stabilizing structures in Li-rich layered oxides should be an efficient strategy for designing advanced cathode materials. (C) 2019 Elsevier B.V. All rights reserved.