Improved cycling and rate performance of Sm-doped LiNi0.5Mn1.5O4 cathode materials for 5 V lithium ion batteries
- Title
- Improved cycling and rate performance of Sm-doped LiNi0.5Mn1.5O4 cathode materials for 5 V lithium ion batteries
- Author
- Kwan-San Hui
- Keywords
- LiNi0.5Mn1.5O4; Sm-doped; Electrode materials; Spinel; Cyclic voltammetry; ELECTROCHEMICAL PROPERTIES; SPINEL LINI0.5MN1.5O4; RATE CAPABILITY; LOCAL-STRUCTURE; LI; LIMN2O4; NI; TEMPERATURE; ELECTRODE; OXYGEN
- Issue Date
- 2014-01
- Publisher
- ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
- Citation
- APPLIED SURFACE SCIENCE; JAN 30 2014, 290, p.412-p418, 7p.
- Abstract
- Spinel powders of Sm-doped LiNi0.5SmxMn1.5-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 LiNi0.5Mn1.5O4 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 degrees 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. (C) 2013 Elsevier B.V. All rights reserved.
- URI
- https://www.sciencedirect.com/science/article/pii/S0169433213021727http://hdl.handle.net/20.500.11754/46923
- ISSN
- 0169-4332; 1873-5584
- DOI
- 10.1016/j.apsusc.2013.11.094
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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