Abstract
The nanoparticle Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 powder was synthesized via co-precipitation method in non-aqueous system. The structure, morphology and electrochemical behaviors of the synthesized material were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and galvanostatic charge-discharge tests. XRD pattern revealed that the nanosize Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 powders had layered hexagonal structure with low cation mixing. SEM image exhibited the nanoparticles were synthesized via non-aqueous coprecipitaiton method. And galvanostatic charge-discharge tests comfirmed the Li[Li 0.2 Mn 0.54 Ni 0.13 Co 0.13 ]O 2 electrode had good electrochemical properties, especially the high rate discharge capability such as 10 C , which make it meet the requirement for high power application such as EV or HEV.
Highlights
Lithium ion batteris (LIB) have become an important power source for portable electronic devices, such as cellular phones and laptop computers [1]
The poor high rate capability of LIB withdraws its further use in high power applications [2,3]
The weak peaks between 20° and 25° are consistent with the LiMn6 cation arrangement that occurs in the transition metal layers of Li2MnO3 regions or nano-domains, which can be indexed to the monoclinic unit cell C2/m [9]
Summary
Lithium ion batteris (LIB) have become an important power source for portable electronic devices, such as cellular phones and laptop computers [1]. The widely adoption choice of solid state or water medium coprecipitation method can give uniform, homogeneous and phase-pure oxide products, but the large particles with the size of micrometer withdraw its use in nanoparticle production [7,8]. In order to prepare nanosized particles for lithium metal oxide, we tried the used coprecipitation method with nonaqueous medium, and the pure Li[Li0.2Mn0.54Ni0.13Co0.13]O2 with nanosize particles has been synthesized. In this paper, this novel nonaqueous coprecipitation method is reported and the structure, morphology and electrochemical properties of the obtained nanoparticles were studied in detail
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