Journal
CERAMICS INTERNATIONAL
Volume 41, Issue 10, Pages 12782-12787Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.06.113
Keywords
Lithium-ion batteries; Cathode materials; LiNi(0.5)Cn(0.45)Fe(0.05)O(2); Solid-state reaction; Electrochemical performance
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Funding
- National Natural Science Foundation of China [21061015]
- National Natural Science Foundation of China for Youth Scholars [21104063]
- College Students' Innovation and Entrepreneurship Training Program of Xinjiang Uygur Autonomous Region
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LiNi0.5Co0.45Fe0.05O2 (LNCFO), a new layered compound, was synthesized by the solid-state method for application as a cathode material in lithium-ion batteries. The microstructure and morphology of the sample were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The electrochemical properties of the material were assessed by charge discharge tests, cyclic voltammetry, and electrochemical impedance spectroscopy. Our data confirmed that LNCFO exhibits a hexagonal alpha-NaFeO2 structure with the R (3) over barm space group and consists of layered grains. According to the charge discharge tests, the sample prepared at 700 degrees C showed the best initial discharge capacity of 160.4 mA h g(-1) 0.2 C and excellent cycling ability. In addition, the samples synthesized at 700 degrees C also showed lower electrochemical impedance than samples synthesized at other temperatures. Our study indicates that the solid-state method is effective for synthesizing LNCFO cathode materials for lithium-ion batteries with outstanding performance. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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