Facile Fabrication and High Supercapacitive Performance of Three-Dimensional Mn/MnOx Periodic Arrays Architecture
| Autor: | Mengya Cui, Rongshi Xiao, Ting Huang, Xin Zhang, Jiejie Xu, Qiang Wu, Qingwei Zhang, Xiaoyang Qin |
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| Rok vydání: | 2019 |
| Předmět: |
Supercapacitor
Fabrication Materials science Renewable Energy Sustainability and the Environment business.industry General Chemical Engineering Contact resistance General Chemistry Electrolyte Current collector Electrochemistry Electrode Environmental Chemistry Optoelectronics business Power density |
| Zdroj: | ACS Sustainable Chemistry & Engineering. 7:14669-14676 |
| ISSN: | 2168-0485 |
| Popis: | In this paper, 3D-Mn/MnOx periodic arrays architecture is fabricated through a facile and efficient method. A femtosecond laser is used to generate a 3D conductive network on a metallic manganese surface which also serves as the current collector (3D-Mn), followed by chemical oxidation to form Mn2O3 and MnO2 on the surface of the 3D-Mn. Detailed electrochemical characterization reveals that the 3D-Mn/MnOx electrode exhibits good rate performance and cycle life, and the assembled 3D-Mn/MnOx supercapacitor can deliver the highest energy density of 5.6 μWh/cm2 at a power density of 21.8 μW/cm2. The enhanced performance is attributed to the unique periodic 3D-Mn/MnOx architecture which largely increases the effective electrode surface area, shortens the electron/ion transportation distance, facilitates electrolyte permeation, and reduces the contact resistance between 3D-Mn and MnOx. Importantly, MnOx is formed directly on the 3D-Mn surface, which helps to maintain the structural integrity and mechanical adhe... |
| Databáze: | OpenAIRE |
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