Preparation of LiNi0.80Co0.15Al0.05O2 cathode material via Li-rich method

doi:10.3969/j.issn.2095-4239.2014.06.009

Abstract

Abstract: Spherical Ni_0.80Co_0.15Al_0.05(OH)_2.05precursors were synthesized via precipitation method. The Ni_0.80Co_0.15Al_0.05(OH)_2.05precursors were mixed with excess lithium sources. LiNi_0.80Co_0.15Al_0.05O₂ cathode materials were obtained after sintering the mixtures at O₂ and air atmosphere, respectively. The structure and morphology of the materials were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The electrochemical performance of the cathode materials were analyzed by constant current charge-discharge test methods. When the molar ratio of Li : (Ni+Co+Al) is 1.15, the structure, morphology and electrochemical performance of the LiNi_0.80Co_0.15 Al_0.05O₂ cathode sample obtained at air atmosphere are very similar with those of the sample made at O₂ atmosphere. It was proved that LiNi_0.80Co_0.15Al_0.05O₂ cathode materials with excellent performance can also be synthesized even at air atmosphere with the help of excess Li. At rate of 0.1 C and 1 C, the cathode materials showed initial capacity of 200 mA·h/g and 168 mA·h/g, respectively, and retention of more than 80% after 800 cycles.

Key words: cathode materials, LiNi0.80Co0.15Al0.05O2, coprecipitation method, Li-rich method

CLC Number:

TM911

CHEN Zhangzong, YUAN Xujun, WEN Meisheng, CHEN Mingfeng, HUANG Lianyou, ZHANG Shilong, YING Jierong. Preparation of LiNi_0.80Co_0.15Al_0.05O₂cathode material via Li-rich method[J]. Energy Storage Science and Technology, 2014, 3(6): 620-623.

References

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Preparation of LiNi_0.80Co_0.15Al_0.05O₂cathode material via Li-rich method

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