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. ORCID:, 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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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,sdg 7 - affordable and clean energy ,/dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energy
Faculty \ School: Faculty of Science > School of Engineering
University of East Anglia Research Groups/Centres > Theme - ClimateUEA
UEA Research Groups: Faculty of Science > Research Groups > Energy Materials Laboratory
Faculty of Science > Research Groups > Emerging Technologies for Electric Vehicles (EV)
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Depositing User: Pure Connector
Date Deposited: 30 Sep 2016 16:00
Last Modified: 20 Apr 2023 00:15
DOI: 10.1016/j.apsusc.2013.11.094

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