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| 超级电容器隔膜的制备及性能研究 |
| Preparation and Properties of Supercapacitor Separator |
| 收稿日期：2022-02-09 修订日期：2022-02-24 |
| DOI： |
| 关键词: 天丝原纤化纤维 孔隙结构 超级电容器 阻抗 |
| Key Words:Tencel-fibrillated-fibers pore-structure supercapacitors impedance |
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| 摘要:本论文采用打浆得到不同原纤化程度的天丝纤维,通过湿法成型工艺制备出不同孔隙结构的天丝原纤化纤维隔膜。重点探讨了纤维尺寸对隔膜孔隙结构的影响,最后进行了不同孔隙结构隔膜对应超级电容器的电化学分析。结果表明,天丝纤维经过不同打浆转数处理后,纤维尺寸和隔膜孔隙结构发生了明显变化。随着原纤化程度的增加,粗纤维比例显著降低,纤维质均长度从2.29 mm降低到0.757 mm。隔膜孔隙率和平均孔径呈现不断下降趋势,对应超级电容器的阻抗呈现上升趋势。随着超级电容器阻抗的上升,超级电容器能量密度随功率增加而造成的衰减现象且更加显著。 |
| Abstract:In this paper, Tencel fibers with different degrees of fibrillation were obtained by beating process. The separators based on Tencel fibrillated fibers were prepared by wet-laid papermaking nonwoven process. Subsequently, the effect of fiber geometry size on the structure of nonwoven separators and supercapacitors performance were discussed. Finally, the results showed that the fiber size and the pore structure of the separator changed significantly after the Tencel fibers were treated with different beating revolutions. With the increase of the degree of fibrillation, the proportion of coarse fibers decreased significantly and the average fiber length decreased from 2.29 mm to 0.757 mm. Consequently, the porosity and average pore size of the separator showed a decreasing trend. For this reason, the impedance of the supercapacitor diplayed an upward trend. As the impedance inccreases, there existed a phenomenon that the attenuation of supercapacitor energy density with the increase of power is more significant. |
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