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N-doped Porous Carbon Nanotubes Derived from Polypyrrole for Supercapacitors with High Performance
Journal of Analytical and Applied Pyrolysis ( IF 6 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.jaap.2020.104925
Shuang Zong , Yue Zhang , Morena S. Xaba , Xinying Liu , Aibing Chen

Abstract N-doped porous carbon nanotubes (NCNs-A) were successfully prepared by a scalable and straightforward mixed salts (NaCl/ZnCl2) activation method with carbon precursor of polypyrrole (PPy). The independent salt NaCl or ZnCl2, the dosage of mixed salts, and the carbonization temperature all have a strong effect on the final products. ZnCl2 is the key activator for activation, and with an increase of the mixed salts, the surface area of NCNs-A is increased. However, excess salt can lead to a decrease in the surface area. Additionally, a suitable carbonization temperature also increases the surface area. The results indicate that optimal synthesis conditions are a mixed salts mass ratio of 2 and a carbonization temperature at 800℃. During the carbonization process, the mixed salts as combined porogen and template ensure the obtained NCNs-A possesses tubular morphology derived from PPy, abundant porous architecture, a high specific surface area of 1278 m2 g−1 and a high nitrogen doping of 9.26 at%. When used as electrode material for the supercapacitor, the NCNs-A achieved an outstanding electrochemical performance.

中文翻译:

用于高性能超级电容器的聚吡咯衍生的 N 掺杂多孔碳纳米管

摘要 以聚吡咯 (PPy) 的碳前驱体为原料,采用可扩展且直接的混合盐 (NaCl/ZnCl2) 活化方法成功制备了 N 掺杂的多孔碳纳米管 (NCNs-A)。独立盐 NaCl 或 ZnCl2、混合盐的用量和碳化温度对最终产品都有很大的影响。ZnCl2 是活化的关键活化剂,随着混合盐的增加,NCNs-A 的表面积增加。然而,过量的盐会导致表面积减少。此外,合适的碳化温度也会增加表面积。结果表明,最佳合成条件为混合盐质量比为2,碳化温度为800℃。在碳化过程中,混合盐作为成孔剂和模板的组合确保获得的 NCNs-A 具有源自 PPy 的管状形态、丰富的多孔结构、1278 m2 g-1 的高比表面积和 9.26 at% 的高氮掺杂。当用作超级电容器的电极材料时,NCNs-A 实现了出色的电化学性能。
更新日期:2020-11-01
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