Enhanced electrochemical performances of LiNi0.5Mn1.5O4 by surface modification with Cu nanoparticles
5V spinel LiNi0.5Mn1.5O4 cathode is prepared by traditional solid-state method and nano-Cu particles were derived from a chemical reduction process. The effect of Cu-coating on the electrochemical performances of LiNi0.5Mn1.5O4 cells, in a wide operation temperature range (-10°C, 25°C, 60°C...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Technical Faculty, Bor
2017-01-01
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| Series: | Journal of Mining and Metallurgy. Section B: Metallurgy |
| Subjects: | |
| Online Access: | http://www.doiserbia.nb.rs/img/doi/1450-5339/2017/1450-53391600021Z.pdf |
| Summary: | 5V spinel LiNi0.5Mn1.5O4 cathode is prepared by traditional solid-state
method and nano-Cu particles were derived from a chemical reduction process.
The effect of Cu-coating on the electrochemical performances of
LiNi0.5Mn1.5O4 cells, in a wide operation temperature range (-10°C, 25°C, 60°C),
is investigated systematically by the charge/discharge testing, cyclic
voltammograms and impedance spectroscopy, respectively. The results
demonstrate that the modified material exhibits remarkably enhanced
electrochemical reversibility and stability. Cu-coated material has much
lower surface and charge transfer resistances and shows a higher lithium
diffusion rate. The Cu coating layer as a highly efficient lithium ion
conductor, acted as a highly efficient protector to restrain the contact
loss. |
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| ISSN: | 1450-5339 2217-7175 |