Au@TiO2/reduced graphene oxide nanocomposites for lithium-ion capacitors
| Autor: | Moon-Ho Ham, Francis Malar Auxilia, Kyunghoon Jang, Jaewon Jang, Hayong Song |
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| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Nanocomposite Materials science Graphene General Chemical Engineering Oxide chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance Industrial and Manufacturing Engineering Energy storage 0104 chemical sciences law.invention Capacitor chemistry.chemical_compound chemistry Chemical engineering law Environmental Chemistry Lithium 0210 nano-technology |
| Zdroj: | Chemical Engineering Journal. 362:136-143 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2019.01.008 |
| Popis: | To meet the overwhelming demands of next-generation energy storage devices, efforts to develop advanced electrode materials with excellent specific capacity/capacitance and cyclic durability are underway. In this study, we develop hierarchical ternary composites based on Au@TiO2 core-shell nanoparticles anchored onto reduced graphene oxide nanosheets through a one-pot hydrothermal method. These composites can be utilized as anodes for electrochemical lithium storage. The ternary composite anodes deliver a high specific capacity of 905 mAh g−1 at 100 mA g−1 after 100 cycles, accompanied by good rate capability. Hybrid lithium-ion capacitors with Au@TiO2/reduced graphene oxide anodes and activated carbon cathodes show a maximum energy density of 110 Wh kg−1 and power density of 11 kW kg−1, along with excellent capacitance retention of 83%, even after 1000 cycles. This suggests that our composites have potential as electrode materials for high-performance supercapacitors. |
| Databáze: | OpenAIRE |
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