Template synthesis of structure-controlled 3D hollow nickel-cobalt phosphides microcubes for high-performance supercapacitors
| Autor: | Ting Zhao, Guancheng Xu, Aihua Zhao, Li Zhang, Shuai Zhang, Xiuli Zhang |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Supercapacitor
Materials science chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Durability Capacitance Energy storage 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Biomaterials Nickel Colloid and Surface Chemistry chemistry Chemical engineering Transition metal 0210 nano-technology Cobalt Power density |
| Zdroj: | Journal of Colloid and Interface Science. 561:23-31 |
| ISSN: | 0021-9797 |
| Popis: | Given that combined merits of both compositions and novel structures play important roles in energy storage of electrode materials, we herein use [CH3NH3][NixCo1-x(HCOO)3] as self-sacrificed precursors to synthesize structure-controlled hollow nickel cobalt phosphides microcubes. The as-obtained hollow NiCoP-2 displays the highest specific capacity of 629 C g−1 at 1 A g−1 and superior cycling stability with 81.3% capacitance retention at 6 A g−1 after 8000 cycles. Moreover, the asymmetric supercapacitor composed of NiCoP-2 and commercial active carbon (YP-80F) presents the remarkable battery storage performance in terms of outstanding specific capacitance (121.5 F g−1 at 1 A g−1), excellent cycling durability (90.1% capacitance retention after 10,000 cycles) and high energy density of 43.2 Wh kg−1 at a power density of 801.6 W kg−1. The attractive performance can be ascribed to superiority of the transition metal phosphides, hollow structures, as well as synergism between Ni and Co. |
| Databáze: | OpenAIRE |
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