...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of materials science >One-step synthesis of chitin-derived nitrogen-rich porous carbon fiber assisted with ammonium chloride chemical blowing for supercapacitors
【24h】

One-step synthesis of chitin-derived nitrogen-rich porous carbon fiber assisted with ammonium chloride chemical blowing for supercapacitors

机译：氯化铵化学吹气辅助几丁质衍生甲壳质衍生的富氮多孔碳纤维

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Rich nitrogen-doped porous carbon fiber (NC–NH~(4)Cl) was successfully prepared from chitin via environmentally friendly simple pyrolysis supplemented with ammonium chloride as a recyclable porogen and nitrogen source. Compared with NH~(4)HCO~(3)and (NH~(4))~(2)SO~(4), NH~(4)Cl proved to be the most effective porogen and nitrogen dopant for chitin. The as-made NC–NH~(4)Cl exhibited a 3D architecture formed by numerous intertwined microfibrils with a hierarchical micro/mesoporous structure. Moreover, NC–NH~(4)Cl possessed a high nitrogen content of 10.0 at.%, and about 70% of the nitrogen was in the form of pyridinic-N and pyrrolic-N. The NC–NH~(4)Cl electrode could deliver superior specific capacitance of 284 F g_(−1)at a current density of 0.5 A g_(−1), as well as favorable rate performance (ca. 66.3% retention as the current density rose from 0.5 to 20 A g_(−1)) and long cycle life (ca. 96.9% maintained after 5000 cycles) in a three-electrode configuration. The assembled NC–NH~(4)Cl-based symmetric capacitor presented a desirable energy density of 16.67 Wh kg_(−1)at 1 A g_(−1). The results suggest that NC–NH~(4)Cl is a promising candidate for supercapacitors.
机译：几丁质通过对环境友好的简单热解并辅以氯化铵作为可循环的致孔剂和氮源，成功地由几丁质制备了富氮掺杂的多孔碳纤维（NC-NH〜（4）Cl）。与NH〜（4）HCO〜（3）和（NH〜（4））〜（2）SO〜（4）相比，NH〜（4）Cl被证明是几丁质最有效的成孔剂和氮掺杂剂。制成的NC–NH〜（4）Cl表现出3D结构，该结构由许多具有层次微/介孔结构的交缠微纤维形成。此外，NC-NH〜（4）Cl的氮含量高，为10.0at。％，其中约70％的氮为吡啶-N和吡咯-N形式。 NC-NH〜（4）Cl电极在0.5A g _（-1）的电流密度下可提供284 F g _（-1）的优良比电容，并具有良好的倍率性能（约66.3％的保留率）在三电极配置中，电流密度从0.5增加到20 A g _（-1）），循环寿命长（5000次循环后保持96.9％）。组装好的基于NC–NH〜（4）Cl的对称电容器在1A g _（-1）处表现出理想的能量密度16.67 Wh kg _（-1）。结果表明，NC-NH〜（4）Cl是超级电容器的有希望的候选者。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号