In-situ evolution process understanding from a salan-ligated manganese cluster to supercapacitive application
| Autor: | Mohamedally Kurmoo, Ming-Hua Zeng, Kai Zhao, Xu Zhang, Xu Peng |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Valence (chemistry) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences Chemical reaction Atomic and Molecular Physics and Optics 0104 chemical sciences Characterization (materials science) Chemical engineering Cluster (physics) General Materials Science Electrical and Electronic Engineering 0210 nano-technology Porosity Inert gas Pyrolysis |
| Zdroj: | Nano Research. 15:346-351 |
| ISSN: | 1998-0000 1998-0124 |
| DOI: | 10.1007/s12274-021-3481-1 |
| Popis: | The goal of material chemistry is to study the relationship among hierarchical structure, chemical reaction and precision preparation for materials, yet tracking pyrolysis process on multi-dimensional scale is still at primary stage. Here we propose packing mode analysis to understand evolution process in high temperature reaction. As a proof of concept, we first design a salan-ligated Mn3 (Mn3(3-MeOsalophen)2(Cl)2) cluster and pyrolyze it under an inert atmosphere directly to a mixed valence MnOx embedded in a porous N-doped carbon skeleton (MnOx/C). Meanwhile, combining thermogravimetry-mass spectrometry (TG-MS) with other characterization techniques, its pyrolysis process is precisely tracked real-time and Mn2+/Mn3+ ratios in the resulting materials are deduced, ensuring excellent electrochemical advantages. As a result, the as-preferred MnOx/C-900 sample reaches 943 F/g at 1 A/g, maintaining good durability under 5,000 cycles with 90% retention. The highlight of packing mode analysis strategy in this work would provide a favorable approach to explore the potential relationship between structure and performance in the future. |
| Databáze: | OpenAIRE |
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