One-pot synthesis of unique skin-tissue-bone structured porous carbons for enhanced supercapacitor performance
| Autor: | Dong Yan, De-Cai Guo, Xiao-Ling Dong, An-Hui Lu, Wen-Cui Li |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Nitrogen Polymers Surface Properties One-pot synthesis Heteroatom chemistry.chemical_element Ionic Liquids 02 engineering and technology 010402 general chemistry Electric Capacitance 01 natural sciences Capacitance Pseudocapacitance Biomaterials chemistry.chemical_compound Colloid and Surface Chemistry Electrodes Supercapacitor Molecular Structure Carbonization Electric Conductivity Phosphorus Electrochemical Techniques 021001 nanoscience & nanotechnology Carbon 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Benzoxazines chemistry Chemical engineering Ionic liquid 0210 nano-technology Porosity |
| Zdroj: | Journal of colloid and interface science. 557 |
| ISSN: | 1095-7103 |
| Popis: | Introduction of hierarchical porous structure and heteroatom in porous carbons are always effective approaches to improve the capacitive performance for supercapacitor. However, it is still a challenge to achieve the desired structure characteristics by a convenient one-step synthesis. Herein, C16mimPF6, an ionic liquid, was introduced in the self-assembly process of poly-benzoxazine to obtain a unique skin-tissue-bone structured hierarchical porous carbon with homogeneous N, P co-doping after carbonization. As the key component, C16mimPF6 works not only as a structure-directing agent to form a hierarchical structure through microphase separation mechanism, thereby promoting the transfer of ion and electron, but also as a heteroatom precursor to contribute an additional pseudocapacitance by doping phosphorus atoms on carbon matrix. The obtained porous carbon displays a high gravimetric capacitance (Cg) of 209 F g−1 (especially in the carbons prepared without corrosive activation step), a good volumetric capacitance (Cv) of 132 F cm−3 and an excellent area-normalized capacitance (Ca) of 35 μF cm−2. Overall, this work opens a new way to design the polymer-derived carbons with easy heteroatoms doping and hierarchical porous structure. |
| Databáze: | OpenAIRE |
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