Synthesis and Electrochemical Characteristics of Li[Li_(0.167)Mn_(0.583)Ni_(0.25)]O_2 Cathode Material

Authors

Ling-yan YU, Beijing Key Lab.of New Energy Materials and Technologies,School of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;Sinosteel Luoyang Institute of Refractories Research,Luoyang 471039,Hennan,China;
Wei-hua QIU, Beijing Key Lab.of New Energy Materials and Technologies,School of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;
Fang LIAN, Beijing Key Lab.of New Energy Materials and Technologies,School of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;
Jia-yuan HUANG, Beijing Key Lab.of New Energy Materials and Technologies,School of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;
Xao-li KANG, Beijing Key Lab.of New Energy Materials and Technologies,School of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;
Wei LIU, Beijing Key Lab.of New Energy Materials and Technologies,School of Material Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China;

Abstract

The cathode material of Li[Li0.167Mn0.583Ni0.25]O2 was synthesized by low-heat solid state reaction.The results of XRD and FESEM indicated that the powders of the material were well crystallized with the uniform diameters ranging from 60 nm to 100 nm and could be indexed as α-NaFeO2 structure(R3-m space).Galvanostatic charge-discharge tests showed that the electrode delivered the capacity of about 120 mAh/g with good cyclability when cycled in 2.5~4.4V at 0.5C.When the cut-off potential was set up to 4.6V,the cathode delivered much larger capacities with the maximum of 234 mAh/g.It was observed that the discharge capacity gradually increased with the increment of the cycle number.The transformation between Mn(Ⅳ) and Mn(Ⅲ) could be responsible for the increasing capacity.However,the causes for this transformation in different potenticals varied.

Keywords

lithium batteries, cathode materials, solid solution, layered structure, low-heat solid state reaction

DOI Link

https://doi.org/10.61558/2993-074X.1878

Publication Date

2008-05-28

Online Available Date

2008-05-28

Revised Date

2008-05-28

Received Date

2008-05-28

Recommended Citation

Ling-yan YU, Wei-hua QIU, Fang LIAN, Jia-yuan HUANG, Xao-li KANG, Wei LIU. Synthesis and Electrochemical Characteristics of Li[Li_(0.167)Mn_(0.583)Ni_(0.25)]O_2 Cathode Material[J]. Journal of Electrochemistry, 2008 , 14(2): 135-139.
DOI: 10.61558/2993-074X.1878
Available at: https://jelectrochem.xmu.edu.cn/journal/vol14/iss2/5