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Stannum doping of layered LiNi3/8Co2/8Mn3/8O2 cathode materials with high rate capability for Li-ion batteries
- Source :
-
Journal of Power Sources . Jul2006, Vol. 158 Issue 1, p524-528. 5p. - Publication Year :
- 2006
-
Abstract
- Abstract: Sn doped lithium nickel cobalt manganese composite oxide of LiNi3/8Co2/8Mn3/8−x Sn x O2 (0≤ x ≤0.10) was synthesized by stannum substitute of manganese to enhance its rate capability at first time. Its structure and electrochemical properties were characterized by X-ray diffraction (XRD), SEM, cyclic voltammetry (CV), galvanostatic intermittent titration technique (GITT) and charge/discharge tests. LiNi3/8Co2/8Mn3/8−x Sn x O2 had stable layered structure with α-NaFeO2 type as x up to 0.05, meanwhile, its chemical diffusion coefficient D Li of Li-ion was enhanced by almost one order of magnitude, leading to notable improvement of the rate capability of LiNi3/8Co2/8Mn3/8O2. The compound of x =0.10 showed the best rate capability among Sn doped samples, but its discharge capacity reduced markedly due to secondary phase Li2SnO3 and increase of cation-disorder. The compound with x =0.05 showed high rate capability with initial discharge capacity in excess of 156mAhg−1. It is a promising alternative cathode material for EV application of Li-ion batteries. [Copyright &y& Elsevier]
- Subjects :
- *LITHIUM
*ELECTROCHEMICAL analysis
*CATIONS
*METHACRYLONITRILE
Subjects
Details
- Language :
- English
- ISSN :
- 03787753
- Volume :
- 158
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Journal of Power Sources
- Publication Type :
- Academic Journal
- Accession number :
- 21188693
- Full Text :
- https://doi.org/10.1016/j.jpowsour.2005.08.026