Cerium vanadate and reduced graphene oxide composites for lithium-ion batteries
| Autor: | Van Hiep Nguyen, Kyunghoon Jang, Jaewon Jang, En Mei Jin, Hayong Song, Moon-Ho Ham, Francis Malar Auxilia, Wan Lin Wang, Gab-Yong Lee, Hal-Bon Gu |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Lithium vanadium phosphate battery Inorganic chemistry Oxide chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences Lithium-ion battery law.invention chemistry.chemical_compound law Materials Chemistry Composite material Power density Graphene Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology 0104 chemical sciences Anode Titanium oxide chemistry Mechanics of Materials Lithium 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 724:1075-1082 |
| ISSN: | 0925-8388 |
| Popis: | There has been a significant interest in the development of novel anode materials that can solve the problems of lithium plating and dendrite formation during the discharge-charge process, thus ensuring safety in Li-ion batteries. We synthesized tetragonal CeVO4 as an alternative to graphite, the active material in commercial Li-ion batteries, via a hydrothermal reaction; CeVO4 has lower lithium insertion potentials of 1.0 and 1.5 V versus Li+/Li compared to those of lithium titanium oxide. In order to overcome the drawbacks of the metal oxide, such as low electrical conductivity and volume change upon cycling, CeVO4/RGO composites were synthesized by mixing CeVO4 uniformly with reduced graphene oxide (RGO) via a solid-state reaction. The CeVO4/RGO composites exhibited improved cycling performance and rate capability, with relatively low charging potential of 1.35 V and high power density of 235 W g−1 at 10 wt% RGO, as compared to the pure CeVO4. Our results suggest that the CeVO4/RGO composites have great potential for use as an anode in lithium ion batteries with high power density and excellent safety. |
| Databáze: | OpenAIRE |
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