Porous carbon nanosheets derived from expanded graphite for supercapacitors and sodium-ion batteries
| العنوان: | Porous carbon nanosheets derived from expanded graphite for supercapacitors and sodium-ion batteries |
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| المؤلفون: | Xiangwu Zhang, Jingli Shi, Yan Song, Mahmut Dirican, Qingchao Fan, Chang Ma |
| المصدر: | Journal of Materials Science. 55:16323-16333 |
| بيانات النشر: | Springer Science and Business Media LLC, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Supercapacitor, Materials science, Mechanical Engineering, chemistry.chemical_element, Capacitance, Anode, Chemical engineering, chemistry, Mechanics of Materials, Specific surface area, General Materials Science, Graphite, Porosity, Carbon, Nanosheet |
| الوصف: | Two-dimensional carbons have attracted extensive interest in the field of energy storage and conversion owing to their unique nanostructure, high aspect ratios, and abundant surface-active sites. In this work, carbon nanosheets with developed porosity and high specific surface area were fabricated from expanded graphite (EG) by a siliconization/chlorination strategy. The worm-like macroporous structure and nanosheet morphology of EG are inherited by the resultant carbon nanosheet. The siliconization/chlorination strategy creates abundant micropores in EG, endowing the as-obtained carbon nanosheet with a high specific surface area of 1229 m2 g−1 and a total pore volume of 0.75 cm3 g−1. With high specific surface area, nanosheet morphology, and macroporous structure, the EG-based carbon nanosheet presents excellent performance when used as electrode materials of supercapacitors and sodium-ion batteries. When used as an electrode of supercapacitors, it delivers a specific capacitance of 210 F g−1, retains 62% of the initial capacitance with increasing current density from 0.1 to 30 A g−1, and maintains 98.6% of the initial capacitance after 5000 cycles. When used as the anode of sodium-ion batteries, it presents a reversible capacity of 198 mAh g−1 at 0.1 A g−1 and maintains 65 mAh g−1 after 1000 cycles at 5 A g−1. The proposed strategy could be extended to other sp2 carbon materials for a highly porous structure. |
| تدمد: | 1573-4803 0022-2461 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::61e7c6fadd42d87dfd773a0284da4275 https://doi.org/10.1007/s10853-020-05154-9 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........61e7c6fadd42d87dfd773a0284da4275 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15734803 00222461 |
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