Characteristic of novel composition Nax[Ni0.6Co0.2Mn0.2]O2 as Cathode Materials for So-dium Ion-Batteries
In this work, novel composition of Nax[Ni0.6Co0.2Mn0.2]O2 (x = 0.5 and 1.0) layered cathode materials were synthesized by using hydroxide co-precipitation and calcined at 850, 900 and 950 °C. We studied the effects of different sodium contents and calcination temperature on the structural and electrochemical properties of this novel cathode material. The change of calcination temperature and sodium content led to different P2-type, P2/P3-type, P2/O3-type, or O3-type structures. The results indicate better electrochemical perfor-mance of the P2-type cathode materials in terms of high discharge capacity and good cycling performance, when compared to P2/P3, P2/O3, and O3-type cathode materials. Na0.5[Ni0.6Co0.2Mn0.2]O2 electrode calcined at 900 °C exhibited a good capacity of 107.15 mAhg-1 and ca-pacity retention over 73 % after 20 cycle. Characterization of this material will help to develop cathode materials for the Na-ion battery cathode.
This paper has not been published before. Upon its acceptance for publication in the Journal, I, as the only senior author, agree to transfer (to the extent transferable, if I am a Government employee) to the Journal of New Materials for Electrochemical Systems, or its assignee, all the rights under the existing Copyright laws, except for the following, which the author(s) specifically retain(s):
- the right to make further copies of all or part of the published article for my use in classroom teaching;
- the right to re-use all or part of the material in a compilation of my own words, or in a textbook of which I am the author;
- the right to make copies of the published work for internal distribution within the institution which employs me.
I agree to inform my co-authors, if any, of the terms of this arrangement.