Non-aqueous synthesis of ultrasmall NiO nanoparticle-intercalated graphene composite as active electrode material for supercapacitors
| Autor: | Dirk Tuma, Charmaine Lamiel, Van Hoa Nguyen, Jae-Jin Shim |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Supercapacitor
Materials science Graphene Mechanical Engineering Nickel oxide Inorganic chemistry Graphene foam Non-blocking I/O Oxide Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Mechanics of Materials law General Materials Science 0210 nano-technology Graphene oxide paper |
| Zdroj: | Materials Research Bulletin. 83:275-283 |
| ISSN: | 0025-5408 |
| Popis: | With the vast exploration of the applications of graphene, researchers are assessing different methods for fabricating graphene-based electrode material with high capacitance but low material and energy costs. In this study, reduced graphene oxide/nickel oxide (RGO/NiO) nanocomposites were prepared using a non-aqueous solvent-based method followed by calcination. Nickel acetate tetrahydrate and tert-butanol were used as the precursor and solvent, respectively. Ultrasmall nickel oxide nanoparticles, ca. 8.0 nm in size, were deposited on the surface of the graphene sheets simultaneously with the partial reduction of graphene oxide. The resulting RGO/NiO electrode exhibited a high capacitance of 689 F g⿿1 at a current density of 0.8 A g⿿1. After 1500 cycles, the specific retention and the coulombic efficiency yielded to 86.34% and 96.39%, respectively, which supports the viability of this composite as an alternative activated material with high electrochemical performance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect