A Co-free layered LiNi0.7Mn0.3O2 cathode material for high-energy and long-life lithium-ion batteries

•LiNi0.7Mn0.3O2, a Co-free layered cathode material, was synthesized via co-precipitation method.•The particle size effect was examined in which cathode performance increased as the particle size decreased.•LiNi0.7Mn0.3O2 material exhibited high reversible capacity and high cycle ability. A Co-free...

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Bibliographic Details
Published in:Journal of alloys and compounds 2014-11, Vol.613, p.96-101
Main Authors: Ko, Seunghyun, Lee, Soon Chang, Lee, Chul Wee, Im, Ji Sun
Format: Article
Language:English
Subjects:
Chemistry
Co-precipitation
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Layered cathode material
Li-ion batteries
Ni-rich
Particle size
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Summary:•LiNi0.7Mn0.3O2, a Co-free layered cathode material, was synthesized via co-precipitation method.•The particle size effect was examined in which cathode performance increased as the particle size decreased.•LiNi0.7Mn0.3O2 material exhibited high reversible capacity and high cycle ability. A Co-free layered cathode material, LiNi0.7Mn0.3O2, was synthesized using the co-precipitation method. The optimum conditions for the cathode were determined on the basis of particle size. The relationship between the cathode material’s particle size and its lithium-ion battery performance was studied on the basis of the capacity and cyclability. The LiNi0.7Mn0.3O2 material exhibited a high reversible capacity of 176mAhg−1 and a high cyclability, with 98% capacity retention after 40 cycles under the optimum conditions with a specific reaction time. A mechanism based on the structures and morphologies of the synthesized cathode materials is proposed.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2014.06.059