当前位置: X-MOL 学术J. Power Sources › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Electrospun ZnFe2O4/carbon nanofibers as high-rate supercapacitor electrodes
Journal of Power Sources ( IF 9.2 ) Pub Date : 2020-06-07 , DOI: 10.1016/j.jpowsour.2020.228416
Shuhua Yang , Jingui Ai , Zhenzhen Han , Le Zhang , Degang Zhao , Jieqiang Wang , Chao Yang , Bingqiang Cao

ZnFe2O4/carbon (ZFO/C) nanofibers are prepared by electrospinning method with subsequent stabilization treatment, high temperature carbonization, and extra induced annealing for high performance supercapacitor electrodes. Previous attempts to incorporate ZFO into electrospun fibers always resulted in ZFO nanofibers without carbon or multiphase components in carbon nanofibers. In this work, the extra induced annealing is introduced, successfully producing ZFO/C nanofibers without any other phases. The continuous carbon nanofibers with a diameter of ~180 nm could make the ion diffusion distance shorter, enhance the conductivity of ZFO, and improve the structural stability of the ZFO/C nanofibers, whereas the small ZFO nanoparticles (~30 nm) can be fully utilized during electrochemical reactions. Therefore, the optimized ZFO/C–B-250-600-280 exhibits a remarkable specific capacitance of 237 F g−1 at the current density of 1 A g−1. Even at the current density of 10 A g−1, 88.2% of capacity is retained.



中文翻译:

静电纺丝ZnFe 2 O 4 /碳纳米纤维作为高倍率超级电容器电极

ZnFe 2 O 4碳/碳(ZFO / C)纳米纤维是通过静电纺丝方法制备的,并随后进行了稳定化处理,高温碳化和高性能超级电容器电极的额外诱导退火。先前将ZFO掺入电纺纤维中的尝试总是导致ZFO纳米纤维在碳纳米纤维中不含碳或多相成分。在这项工作中,引入了额外的诱导退火,成功地生产了ZFO / C纳米纤维,而没有任何其他相。直径约180 nm的连续碳纳米纤维可以缩短离子扩散距离,提高ZFO的电导率,并改善ZFO / C纳米纤维的结构稳定性,而小的ZFO纳米颗粒(约30 nm)可以完全在电化学反应中使用。因此,-1 1 A G的电流密度-1。即使在电流密度为10 A g -1时,仍可保持88.2%的容量。

更新日期:2020-06-07
down
wechat
bug