超级电容器
材料科学
过电位
佩多:嘘
塔菲尔方程
化学工程
储能
电催化剂
纳米纤维
碳纳米纤维
交换电流密度
静电纺丝
法拉第效率
纳米技术
电极
电容
聚合物
阳极
复合材料
碳纳米管
电化学
化学
图层(电子)
功率(物理)
物理
量子力学
工程类
物理化学
作者
Sampath Karingula,Shekher Kummari,K. Yugender Goud,Thirupathi Bhookya,K. Vengatajalabathy Gobi
出处
期刊:Small
[Wiley]
日期:2024-06-07
标识
DOI:10.1002/smll.202400812
摘要
Abstract Manufacturing high‐performance and cost‐affordable non‐metallic, electroactive 1D carbon material for energy storage and hydrogen evolution reaction (HER) is of foremost importance to respond positively to the impending energy crisis. Porous N‐doped carbon nanofiber (PNCNF) is successfully synthesized by electrospinning, using selenium nanoparticles as a sacrificial template (where Se is reutilized for ZIF‐67 selenization as a bi‐process, and the surface of PNCNF is modified with poly(3,4‐ethylenedioxythiophene) (PNCNT/PEDOT) by electropolymerization. The prepared materials are found ideal for energy storage (supercapacitor) and electrocatalysis (HER). The bi‐functional material has shown excellent energy storage capability with the specific capacitance (C S ) of 230 F g −1 (PNCNF) and 395 F g −1 (PNCNF/PEDOT), and the symmetric supercapacitor device, PNCNF/PEDOT//PEDOT/PNCNF, exhibits 32.4 Wh kg −1 energy density at 14400 W kg −1 power density with 96.6% Coulombic efficiency and 106% C S at the end of 5000 charge–discharge cycles. The rate capability of the symmetric supercapacitor cell of PNCNF/PEDOT is 51% for the current density increase from 1 to 8 A g −1 , while that of PNCNF is a meager 29% only. Electrocatalytic HER at the PNCNF electrode is achieved with an overpotential of 281 mV@10 mA cm −2 relative to the Pt/C electrode and a low Tafel slop value of 96 mV dec −1 .
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