Synthesis and electrochemical properties of LiNi1/3Co1/3Mn1/3O2 via an original wet-chemical route for high voltage Li-ion batteries

摘要

The LNCM oxide precursor (lithiated transition metal oxide precursor) with alpha-NaFeO2 structure and imperfect crystallinity is successfully synthesized via an original wet-chemical process. The layered LiNi1/3Co1/3Mn1/3O2 cathode material for Li-ion batteries (LIBs) with good crystallinity, satisfied cation ordering and homogeneous morphology is prepared from the LNCM oxide precursor following by heat treatment. The initial capacities of the obtained material are 143.0, 154.9 and 164.6 mAh.g(-1) at 1 C rate (150 mA.g(-1)) in different voltage ranges of 3.0-4.3, 3.0-4.4 and 3.0-4.5 V, respectively. After 100 cycles it retains 91.2, 91.0 and 90.8% of the initial capacities. It shows that the original wet-chemical process followed by heat treatment is an ideal route to prepare the LiNi1/3Co1/3Mn1/3O2 material with outstanding electrochemical properties for high voltage LIBs. (C) 2017 Elsevier B.V. All rights reserved.