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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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Published in: | Rare metals 2014-10, Vol.33 (5), p.608 |
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Main Authors: | , , , |
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] |
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ISSN: | 1001-0521 1867-7185 |
DOI: | 10.1007/s12598-013-0097-y |