4th Annual International Workshop on Materials Science and Engineering | |
Cobalt-free Li-Rich 0.1Li2MnO3?0.9LiNi0.56Mn0.44O2 with High Performances as Cathode Material for Lithium-ion Batteries | |
Dou, Shumei^1 ; Wei, Fenyan^1 ; Li, Huiqin^1 ; Li, Ping^1 | |
Engineering Research Center of Advanced Ferroelectric Functional Materials, Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineer, Baoji University of Arts and Sciences, Baoji, Shaanxi | |
721013, China^1 | |
关键词: Cath-ode materials; Electrochemical measurements; Electrochemical performance; High-temperature calcination; Initial discharge capacities; Layered Structures; Rate capabilities; Synergistic effect; | |
Others : https://iopscience.iop.org/article/10.1088/1757-899X/381/1/012180/pdf DOI : 10.1088/1757-899X/381/1/012180 |
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来源: IOP | |
【 摘 要 】
The cobalt-free Li-rich layered oxide 0.1Li2MnO3•0.9LiNi0.56Mn0.44O2 is successfully synthesized by a coprecipition method followed by high-temperature calcinations. The compostions and structures of the material have been investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and the results revealed that the sample possesses typical α-NaFeO2 layered structure with a weak reflection of LiMnO6, and of microspheres with porous surface. Electrochemical measurements showed that the cobalt-free Li-rich sample delivers good cycling stability and rate capability with initial discharge capacity of 263, 173, 137 and 57 mAh g-1 at different current density of 50, 160, 320 and 640 mA g-1, respectively. The electrochemical performances of the cobalt-free Li-rich 0.1Li2MnO3•0.9LiNi0.56Mn0.44O2 could be related to not only the synergistic effect of specific morphology and appropriate size but also the porous surface.
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