Ti3C2(OH)(2) coated Li(Ni0.6Co0.2Mn0.2)O-2 cathode material with enhanced electrochemical properties for lithium ion battery

Ti3C2(OH)(2) coated nickel-rich LiNi0.6Co0.2Mn0.2O2 cathode material is prepared with wet coating process. The effects of the Ti3C2(OH)(2) concentration on the structure and electrochemical performance of LiNi(0.6)Co(0.2)Mn(0.2)O(2)cathode materials are investigated. The microanalyses show that Ti3C2(OH)(2) is successfully coated on the surface of LiNi0.6Co0.2Mn0.2O2 cathode material. All cathode materials display the excellent hexagonal ordering and the low ratio of I(006+102)/I-(101). Furthermore, the Ti3C2(OH)(2) coated cathode materials presents excellent cycling capability and rate capability. Among them, the 3.0 wt.% Ti3C2(OH)(2) coated LiNi0.6Co0.2Mn0.2O2 displays the highest discharge capacity of 124.5 mAh/g with the capacity retention of 86.4% after 200 cycles at 0.5 C, and the best rate performance at high current density. So Ti3C2(OH)(2) coating is good promising material for LiNi0.6Co0.2Mn0.2O2 to improve the long-life and rate capability. (C) 2018 Elsevier Ltd. All rights reserved.