期刊
JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY
卷 1, 期 2, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3103483
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资金
- NASA-URC [NNX08AB12A, NNX08BA48A]
- NASA [103337, NNX08AB12A] Funding Source: Federal RePORTER
The practical limitations of fully lithium ion insertion and extraction into LiMn2O4 cathode structure without any structural instability make it unsuitable in commercial Li-ion rechargeable batteries. In this work, we showed that those partially substituted by Ni, i.e., LiMn2-xNixO4 (0 <= x <= 0.5), prepared by sol-gel technique, could be used as a potential candidate for high energy density and high voltage Li-ion battery applications with superior rate capabilities. The improved structural stability of the cathode was probed by x-ray diffraction and micro-Raman spectroscopy. The density-functional theoretical calculations were employed to identify the minimum energy needed for Li+ diffusion pathway and activation energy in the spinel framework with different Ni ion concentrations. Our results showed significant enhancement in the properties with 25 at. % of Ni solid-solution doping in LiMn2O4 host and the experimental results are in line with the theoretical computations. (C) 2009 American Institute of Phyics. [DOI: 10.1063/1.3103483]
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