Synthesis of NiCo-layered double hydroxide/multilayer graphene composite via the ozone oxidation combined microwave-assisted synthesis strategy
| Autor: | Huifang Kuang, Wenzhi Wu, Minmin Shuai, Qidan Ling, Hong Chen, Wengong Zhang, Huangqing Zhang |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Supercapacitor
Materials science Graphene Mechanical Engineering Composite number General Chemistry Capacitance Electronic Optical and Magnetic Materials law.invention chemistry.chemical_compound Chemical engineering chemistry law Materials Chemistry Hydroxide Electrical and Electronic Engineering Porosity Current density Power density |
| Zdroj: | Diamond and Related Materials. 120:108636 |
| ISSN: | 0925-9635 |
| Popis: | There is an ever-growing demand for developing environment-friendly and cost-effective approach to synthesize high-performance supercapacitor electrode materials. This work proposes a facile, rapid and environmentally-friendly strategy to prepare NiCo-layered double hydroxide/multilayer graphene composite (termed as NiCo-LDH/MLG) using methods of ozone oxidation and microwave-assisted synthesis. The NiCo-LDH/MLG possesses a distinctive 3D petal-like porous architecture, which endows a high specific capacitance of 1212.75 F·g−1 at the current density of 1 A·g−1 in a three-electrode system. Moreover, the NiCo-LDH/MLG exhibit excellent rate capability with 80.5% of the capacitance retained at 6 A·g−1 even after 3000 cycles. In addition, the symmetrical supercapacitor based on NiCo-LDH/MLG delivered a high energy density of 23.14 Wh·kg−1 at a power density of 1049 W·kg−1. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect