Nitrogen doped carbon derived from polyimide/multiwall carbon nanotube composites for high performance flexible all-solid-state supercapacitors
| Autor: | Nam Dong Kim, Dae Kyom Kim, Nam-Ho You, Minsik Hwang, Seung Keun Park, Yuanzhe Piao, Kwang-dong Seong |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Energy Engineering and Power Technology chemistry.chemical_element 02 engineering and technology Carbon nanotube engineering.material 010402 general chemistry 01 natural sciences Capacitance law.invention Coating law Electrical and Electronic Engineering Physical and Theoretical Chemistry Composite material In situ polymerization Supercapacitor Renewable Energy Sustainability and the Environment Carbonization 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry engineering 0210 nano-technology Carbon Polyimide |
| Zdroj: | Journal of Power Sources. 380:55-63 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2018.01.069 |
| Popis: | Flexible all-solid-state supercapacitors are desirable as potential energy storage systems for wearable technologies. Herein, we synthesize aminophenyl multiwall carbon nanotube (AP-MWCNT) grafted polyimide precursor by in situ polymerization method as a nitrogen-doped carbon precursor. Flexible supercapacitor electrodes are fabricated via a coating of carbon precursor on carbon cloth surface and carbonization at high temperature directly. The as-obtained electrodes, which can be directly used without any binders or additives, can deliver a high specific capacitance of 333.4 F g−1 at 1 A g−1 (based on active material mass) and excellent cycle stability with 103% capacitance retention after 10,000 cycles in a three-electrode system. The flexible all-solid-state supercapacitor device exhibits a high volumetric capacitance of 3.88 F cm−3 at a current density of 0.02 mA cm−3. And also the device can deliver a maximum volumetric energy density of 0.50 mWh cm−3 and presents good cycling stability with 85.3% capacitance retention after 10,000 cycles. This device cell can not only show extraordinary mechanical flexibilities allowing folding, twisting, and rolling but also demonstrate remarkable stable electrochemical performances under their forms. This work provides a novel approach to obtain carbon textile-based flexible supercapacitors with high electrochemical performance and mechanical flexibility. |
| Databáze: | OpenAIRE |
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