Facile synthesis and electrochemical properties of layered Li[Ni_1/3Mn_1/3Co_1/3]O₂ as cathode materials for lithium-ion batteries

Abstract

A layered oxide Li[Ni_1/3Mn_1/3Co_1/3]O₂ was synthesized by an oxalate co-precipitation method. The morphology, structural and composition of the as-papered samples synthesized at different calcination temperatures were investigated. The results indicate that calcination temperature of the sample at 850°C can improve the integrity of structural significantly. The effect of calcination temperature varying from 750°C to 950°C on the electrochemical performance of Li[Ni_1/3Mn_1/3Co_1/3]O₂, cathode material of lithium-ion batteries, has been investigated. The results show that Li[Ni_1/3Mn_1/3Co_1/3]O₂ calcined at 850°C possesses a higher capacity retention and better rate capability than other samples. The reversible capacity is up to 178.6 mA·h·g⁻¹, and the discharge capacity still remains 176.3 mA·h·g⁻¹ after 30 cycles. Moreover, our strategy provides a simple and highly versatile route in fabricating cathode materials for lithium-ion batteries.

Keywords

Li[Mn_1/3Ni_1/3Co_1/3]O₂ / cathode material / oxalate co-precipitation / lithium-ion battery

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51571065 and 51271061) and the Natural Science Foundation of Guangxi (Grant Nos. 2013GXNSFGA019007 and 2014GXNSFAA118340).

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