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HomeKey Engineering MaterialsKey Engineering Materials Vol. 727A Comparison of Different Ways of Mixing the...

A Comparison of Different Ways of Mixing the Lithium Salt on the Electrochemical Properties for Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂ Materials

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Abstract:

Li-rich layered cathode materials Li [Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂ with spherical morphology were synthesized via a co-precipitation method by different ways of mixing the lithium salt_.The cathode materials were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM). The results show that Li [Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂with a well-ordered layered structure consists of small primary particles ranging from 180 to 370 nm. By comparation, the primary particles of T2 (mixing with Li₂CO₃ after preheating carbonate precursor) is smaller. Electrochemical measurements have also been employed, including charge-discharge, cyclic voltammetry (CV) and electrochemical impedance spectra (EIS). It is demonstrated that T2 exhibits significant improvements on the electrochemical performance, especially the rate capability. The discharge capacity is 211 mAh g⁻¹ at 1C for T2 electrode, and still maintains an discharge capacity of 158.8mAh g⁻¹ at 4C. It is believed that the remarkably enhanced rate capability might be ascribed to mixing with Li₂CO₃ after preheating by changing the way of mixing with Li₂CO₃.

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Functional Materials Research II

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Periodical:

Key Engineering Materials (Volume 727)

Pages:

744-750

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.727.744

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Online since:

January 2017

Authors:

Min Luo, Ran Zhang, Meng Wang, Yun Bo Chen, Mo Chu

Keywords:

Carbonate Co-Precipitation, Li-Rich Cathode Materials, Lithium Ion Battery

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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