Macroscopic synthesis of ultrafine N-doped carbon nanofibers for superior capacitive energy storage

• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2019,（21）
• 页码范围: 1617-1624
• 页数: 8页
• 语种: 英文

摘要

Carbon nanofibers (CNFs) with excellent electric conductivity and high surface area have attracted immense research interests in supercapacitors.However,the macroscopic production of CNFs still remains a great challenge.Herein,ultrafine N-doped CNFs (N-CNFs) with a diameter of ～20 nm are synthesized through a simple and scalable sol-gel method based on the self-assembly of phenolic resin and cetyltrimethylammonium bromide.When employed in aqueous supercapacitors,the obtained activated N-CNFs manifest a high gravimetric/areal capacitance (380 F g-1/1.7 F cm-2) as well as outstanding rate capability and cycling stability.Besides,the activated N-CNFs also demonstrate excellent capacitive performance (330 F g-1) in flexible quasi-solid-state supercapacitors.The remarkable electrochemical performance as well as the easy and scalable synthesis makes the N-CNFs a highly promising electrode material for supercapacitors.