Macroporous defective tungsten oxide nanostructure electrodes deliver ultrahigh capacitance and remarkable long cyclic durability in LiCl electrolyte
| Autor: | Min Yang, Lin Li, Bohui Wei, Chenzhong Yao, Li Ma, Jun Li |
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| Rok vydání: | 2018 |
| Předmět: |
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Supercapacitor Nanostructure Materials science Process Chemistry and Technology Nanotechnology 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Capacitance 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Electrode Materials Chemistry Ceramics and Composites 0210 nano-technology Science technology and society |
| Zdroj: | Ceramics International. 44:22718-22724 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.09.054 |
| Popis: | Tungsten oxide (WO3) has been considered as an fascinating candidate for supercapacitors (SCs) material because of its desirable physico-chemical properties and electrochemical behaviors. Nevertheless, it is still a significant challenge to enhance its electrochemical properties and stability. Herein, we report an electroreduction strategy to fabricate the macroporous defective tungsten oxide nanostructure (ER-WO3) as a negative electrode material with outstanding electrochemical behavior and remarkable cycling durability in 5 M LiCl aqueous electrolyte, which attributes to the introduction of oxygen deficiencies. The ER-WO3 electrode exhibits a large areal capacitance of 244.7 mF cm−2 and an ultrahigh gravimetric specific capacitance of 266.6 F g−1 at scan rate of 50 mV s−1. More importantly, the ER-WO3 product also delivers an ultralong cyclic stability with 97.4% capacitance retention after 5000 cycles. Such these optimized properties of the ER-WO3 nanostructure electrode will promote its applications in the field of science and technology. |
| Databáze: | OpenAIRE |
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