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LiNi^sub 0.7^Co^sub 0.15^Mn^sub 0.15^O2 microspheres as high-performance cathode materials for lithium-ion batteries

Advanced uniform LiNi^sub 0.7^Co^sub 0.15^Mn^sub 0.15^O2 microspheres were successfully synthesized and examined as cathode materials for lithium-ion batteries. The structure, morphology, and electrochemical performance of LiNi^sub 0.7^Co^sub 0.15^Mn^sub 0.15^O2 calcined at different temperatures ra...

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Bibliographic Details
Published in:Rare metals 2014-10, Vol.33 (5), p.608
Main Authors: Lu, Zhou-guang, Tan, Xin-xin, Tang, You-gen, Zhou, Ke-chao
Format: Article
Language:English
Online Access:Get full text
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Summary:Advanced uniform LiNi^sub 0.7^Co^sub 0.15^Mn^sub 0.15^O2 microspheres were successfully synthesized and examined as cathode materials for lithium-ion batteries. The structure, morphology, and electrochemical performance of LiNi^sub 0.7^Co^sub 0.15^Mn^sub 0.15^O2 calcined at different temperatures ranging from 650 to 900 °C were systematically investigated. The XRD results show that the material has a well-ordered layered structure with small amount of cation mixing. A distinct spherical morphology of the obtained powders prepared at different temperatures can be seen from the SEM images. The as-synthesized LiNi^sub 0.7^Co^sub 0.15^Mn^sub 0.15^O2 powders have a very high-tap density of about 2.37 g·cm^sup -3^. Among all the samples, the sample calcined at 750 °C exhibits the best electrochemical performance with an initial discharge capacity of 185.2 mAh·g^sup -1^ (3.0-4.3 V, 0.2C rate) and capacity retention >94.77 % after 50 cycles. Moreover, this material shows high-specific capacity and good cycling stability. The LiNi^sub 0.7^Co^sub 0.15^Mn^sub 0.15^O2 microspheres with high-specific capacity and high-tap density are promising to use as cathode materials for next-generation high-energy-density lithium-ion batteries.[PUBLICATION ABSTRACT]
ISSN:1001-0521
1867-7185
DOI:10.1007/s12598-013-0097-y