Improved cycling and rate performance of Sm-doped LiNi0.5Mn 1.5O4 cathode materials for 5 v lithium ion batteries

Mo, Mingyue, Hui, K. S., Hong, Xiaoting, Guo, Junsheng, Ye, Chengcong, Li, Aiju, Hu, Nanqian, Huang, Zhenze, Jiang, Jianhui, Liang, Jingzhi and Chen, Hongyu (2014) Improved cycling and rate performance of Sm-doped LiNi0.5Mn 1.5O4 cathode materials for 5 v lithium ion batteries. Applied Surface Science, 290. pp. 412-418. ISSN 0169-4332

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Abstract

Spinel powders of Sm-doped LiNi0.5SmxMn 1.5-xO4 with different Sm contents (x = 0, 0.01, 0.03, and 0.05) have been synthesized by a gelatin-assisted solid-state method. The structural and electrochemical properties of the electrode materials are characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), cyclic voltammetry (CV), charge/discharge testing and electrochemical impedance spectroscopy (EIS). The partial substitution of Sm3+ for Mn3+ in LiNi0.5Mn1.5O 4 leads to a decrease in the lattice parameter and unit cell volumes, resulting in an improvement of structural stability, enhance the electronic conductivity and diminish the polarization and the charge transfer resistance. As a result, the cyclic ability at 25 C performances and rate performances of LiNi0.5Mn1.5O4 electrode materials are significantly improved with the increasing Sm addition, compared to the pristine LiNi0.5Mn1.5O4, though high doping gives rise to a small reduction of the initial discharge capacity.

Item Type: Article
Uncontrolled Keywords: lini0.5mn1.5o4,sm-doped,electrode materials,spinel,cyclic voltammetry
Faculty \ School: Faculty of Science > School of Mathematics
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Depositing User: Pure Connector
Date Deposited: 30 Sep 2016 16:00
Last Modified: 22 Apr 2020 01:47
URI: https://ueaeprints.uea.ac.uk/id/eprint/60646
DOI: 10.1016/j.apsusc.2013.11.094

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