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Synthesis and Characterization of Gradient Cathode Material for Lithium-Ion Batteries

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Abstract:

Gradient cathode material of LiNi0.7Co0.15Mn0.15O2 was synthesized by mixing hydroxide co-precipitated precursors with 8% excess LiOH•H2O. Structure and electrochemical properties of the material was characterized by X-ray diffraction (XRD), scanning electronic microscope (SEM), galvanostatic charge-discharge test and electrochemical impedance spectroscopy (EIS). The results indicate that the typical crystal of the material is α-NaFeO2. The particles are formed by 200nm~500nm crystals. The gradient material sintered at 800°C shows the best electrochemical performance, the initial discharge capacity of the material is 164.45mAh•g-1 at 0.2C, its discharge capacity retention of 86% at 2C and with lower electrochemical impedance.

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Info:

Periodical:

Advanced Materials Research (Volumes 391-392)

Pages:

1435-1439

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.391-392.1435

Citation:

Cite this paper

Online since:

December 2011

Authors:

Tao Dong, Li Peng Zhang, Xian Jin Yu, Zeng Dian Zhao, Yun Hui Dong

Keywords:

Gradient Material, LiNi0.7Co0.15Mn0.15O2, Lithium-Ion Battery, Multiple Co-Precipitation

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