Shape-controlled synthesis of CoMoO4@Co1.5Ni1.5S4 hybrids with rambutan-like structure for high-performance all-solid-state supercapacitors
| Autor: | Xian-Zhu Fu, Ching-Ping Wong, Chao Wang, Rong Sun, Zhishu Guan, Yanbin Shen, Shuhui Yu |
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| Rok vydání: | 2018 |
| Předmět: |
Supercapacitor
Materials science General Chemical Engineering Nanoparticle 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 chemistry Chemical engineering Environmental Chemistry Nanorod 0210 nano-technology Current density Cobalt Power density |
| Zdroj: | Chemical Engineering Journal. 346:193-202 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2018.03.160 |
| Popis: | Hybrid-structured nanoparticles have demonstrated superior chemical, physical or electrochemical properties over a single component owing to the synergistic effects from each component. Here we report on rambutan-like cobalt molybdate@nickel cobalt sulfides (CoMoO4@Co1.5Ni1.5S4) hybrids for electrochemical energy storage which are synthesized on Ni foam by a facile hydrothermal method. CoMoO4 microspheres are directly grown on the Ni foam as the core and Co1.5Ni1.5S4 nanorods grown in sequence in shape of branches. This exceptional structure is beneficial for rapid electron transport and fast diffusion of ions owing to the existence of vast channels. Consequently, this hybrid electrode material exhibits an overall improved capacitive performance, including a high specific capacitance of 1405 F g−1 at the current density of 1 A g−1 and an excellent cyclic stability (92% retained after 1000 cycles at 10 A g−1). In addition, an all-solid-state asymmetric supercapacitor is fabricated which exhibits a high specific capacitance of 221.3 F g−1 collected at 1.5 A g−1, and a high energy density of 127.86 W h kg−1 is gained at a power density of 2003.88 W kg−1. After rapid charging (3 s), two such all-solid-state devices in series light a red light-emitting diode over 10 min. Thus, our work provides a remarkable candidate for energy storage and conversion devices. |
| Databáze: | OpenAIRE |
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