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Enhanced energy density of coaxial fiber asymmetric supercapacitor based on MoS2@Fe2O3/carbon nanotube paper and Ni(OH)2@NiCo2O4/carbon nanotube fiber electrodes.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2020-09-21 , DOI: 10.1002/chem.202004002
Hang He 1 , Xijia Yang 1 , Liying Wang 1 , Xueyu Zhang 1 , Xuesong Li 1 , Wei Lü 1
Affiliation  

Fiber supercapacitors are promising energy storage devices for potential application in wearable and miniaturized portable electronics, which currently suffer from difficulties in achieving high capacitance and energy density synchronously owing to the limited specific surface area of the electrode materials and material incompatibility between the two electrodes. Herein, a strategy is developed for the manufacture of coaxial asymmetric fiber supercapacitors by wrapping a core of PVA‐KOH gel electrolyte‐coated Ni(OH)2@NiCo2O4/CNT fibers with MoS2@Fe2O3/CNT paper. The as‐prepared coaxial fiber asymmetric supercapacitors exhibit a specific capacitance of 373 mF cm−2 (at a current density of 2 mA cm−2) and energy density of 0.13 mW h cm−2 (at a power density of 3.2 mW cm−2), and also show good rate capability, long cycle life, and excellent flexibility. This work provides the possibility for the practical application of fiber supercapacitors in wearable and portable energy storage equipment.

中文翻译:

基于MoS2 @ Fe2O3 /碳纳米管纸和Ni(OH)2 @ NiCo2O4 /碳纳米管纤维电极的同轴纤维非对称超级电容器的能量密度提高。

纤维超级电容器是有望在可穿戴和小型化便携式电子设备中潜在应用的储能设备,由于电极材料的比表面积有限和两个电极之间的材料不兼容,目前它们难以同步实现高电容和能量密度。本文提出了一种通过使用MoS 2 @Fe 2 O 3 / CNT纸包裹PVA-KOH凝胶电解质涂覆的Ni(OH)2 @NiCo 2 O 4 / CNT纤维的芯来制造同轴不对称纤维超级电容器的策略。。所准备的同轴光纤非对称超级电容器的比电容为373 mF cm -2(在2 mA cm -2的电流密度下)和0.13 mW h cm -2(在3.2 mW cm -2的功率密度下)的能量密度,并且还显示出良好的速率能力,长循环寿命和优异的柔韧性。这项工作为光纤超级电容器在可穿戴和便携式储能设备中的实际应用提供了可能性。
更新日期:2020-09-21
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