Freestanding electrodes based on nitrogen-doped carbon nanofibers and zeolitic imidazolate framework-derived ZnO for flexible supercapacitors

被引:5
|
作者
Gao, Hao [1 ]
Joshi, Bhavana [1 ]
Samuel, Edmund [2 ]
Khadka, Ashwin [1 ]
Kim, Si Wung [1 ]
Aldalbahi, Ali [3 ]
El-Newehy, Mohamed [3 ]
Yoon, Sam S. [1 ]
机构
[1] Korea Univ, Sch Mech Engn, Seoul 02841, South Korea
[2] Korea Univ, Grad Sch Energy & Environm, KU KIST Green Sch, Energy Environm Policy & Technol, Seoul 02841, South Korea
[3] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia
基金
新加坡国家研究基金会;
关键词
Electrospinning; ZIF-7; Carbon nanofiber; Freestanding electrode; Flexible supercapacitor; HIGH-ENERGY; DENSITY; NANOPARTICLES; COMPOSITES; FIBERS; ANODE;
D O I
10.1016/j.apsusc.2023.159221
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
This study investigates the carbonization of electrospun fibers derived from zeolitic imidazolate framework (ZIF)-7/polyacrylonitrile solutions containing urea or polyvinylpyrrolidone (PVP). The carbonization yields highly flexible composites comprising nitrogen-doped carbon nanofibers and ZnO. Notably, using PVP as a nitrogen source generates a composite exhibiting excellent electrochemical performance. Specifically, it delivers a high capacitance of 382.5 mF cm-2 at a current density of 1 mA cm-2. Furthermore, this composite demonstrates capacitance retentions of approximately 101 % and 80 % after 10,000 cycles and a 90 degrees bending test, respectively. The charge-storage capability of the PVP-based ZnOP/C composite surpasses that obtained without PVP by 1.4 times. Additionally, a composite fiber mat of ZnOP/C obtained via one-step electrospinning exhibits exceptional electrical conductivity and an energy density of 49 mu Wh cm-2 at a power density of 2 mW cm-2. These findings highlight the potential of this material as an electrode for supercapacitors.
引用
收藏
页数:10
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