Li1.2Mn0.6Ni0.2O2 Cathode Material Prepared by the Ultrasonic Dispersionassisted Method

Author(s): Tingting Fang, Hailiang Chu, Junqiang Hua, Ying Zhu, Shujun Qiu*, Shengzhou Bu, Liangbin Zhang, Mingzhong Yuan, Yongjin Zou, Cuili Xiang, Huanzhi Zhang, Erhu Yan, Fen Xu, Lixian Sun*

Journal Name: Current Mechanics and Advanced Materials

Volume 1 , Issue 1 , 2021


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Abstract:

Background: Lithium-rich layered materials with high discharge capacity are regarded as one of the most promising cathodes for lithium-ion batteries (LIBs). However, they have been suffering from rapid voltage fading and poor rate performance, which impede their practical application.

Methods: Herein, Li1.2Mn0.6Ni0.2O2 with layered structure was successfully prepared by the ultrasonic dispersion-assisted chemical reduction. X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscope (TEM) and electrochemical measurements were used to characterize its microstructure and electrochemical properties.

Results: The secondary particles of an as-prepared micro/nanostructured sample consist of irregular and sheet-like rectangular blocks. Electrochemical results show that the initial charge and discharge capacity within 2.0~4.8 V is 337.5 mA h g-1 and 236.9 mA h g-1 at 0.2C (1C = 200 mA g-1). The subsequent discharge capacity is stabilized at about 210 mA h g-1 for more than 100 cycles. When the current density is increased to 2C, the cycling columbic efficiency is maintained at 99.3% after 100 cycles.

Conclusion: Thus, the Li1.2Mn0.6Ni0.2O2 cathode material prepared by ultrasonic dispersion-assisted chemical reduction has a promising application in LIBs with high energy density and long cycle life.

Keywords: Cathode, electrochemical properties, layered oxide, lithium-ion battery, rate performance, voltage decay.

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Article Details

VOLUME: 1
ISSUE: 1
Year: 2021
Published on: 31 March, 2020
Page: [58 - 65]
Pages: 8
DOI: 10.2174/2666184501666200331125614

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