Preparation and performance of zinc@polypyrrole fabric electrode
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摘要: 为满足可穿戴智能纺织品微电子功能元件的供能需求,柔性储能器件成为研究的重点。电极是储能器件重要组成部分,决定了器件能量存储的大小。本文以导电镀银锦纶织物为基体,采用磁控溅射技术将金属锌(Zn)负载在织物表面,再通过化学聚合和电化学聚合两种方式构筑导电高分子聚吡咯(PPy)。分别对Zn@PPy/织物电极的表观形貌、电学性能和电化学性能进行评价,并探究化学聚合和电化学聚合PPy及磁控溅射时间对织物电极性能的影响。结果表明:采用磁控溅射镀技术可在织物表面实现Zn膜的均匀生长,表面方阻为1.51 Ω;制备的Zn@PPy/织物电极比电容高达1185 mF/cm2,是PPy/织物电极的4.21倍。该织物电极制备方法简单,在可穿戴纺织品微电子供能领域具有潜在的应用前景。Abstract: In order to supply energy for wearable smart textile microelectronic functional components, flexible energy storage devices have become the important research. The electrode is an important component of the energy storage device and determines capacitance of the device. In this paper, a conductive silver-plated nylon fabric was used as the substrate, and zinc was loaded on the fabric surface by magnetron sputtering technology, then the conductive polymer polypyrrole (PPy) was constructed by both chemical and electrochemical polymerization. The morphology, electrical and electrochemical properties of the Zn@PPy fabric electrode was evaluated, and the influence of parameters such as chemical polymerization, electrochemical polymerization and magnetron sputtering time on the performance of fabric electrodes were investigated. The results show that Zn film can be uniformly grown on the fabric surface by magnetron sputtering with a surface sheet resistance of 1.51 Ω. Zn@PPy fabric electrode has a specific capacitance of 1185 mF/cm2, which is 4.21 times higher than PPy/fabric electrode. This simple method of fabric electrode has potential applications in the field of microelectronic energy supply for wearable textiles.
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Key words:
- polypyrrole /
- magnetron sputtering /
- zinc /
- fabric electrode /
- electrochemical properties
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图 3 Zn/织物电极磁控溅射锌的微观表征:((a)~(c)) 1.5 h磁控溅射锌的SEM图像;((d)~(f)) 1.5 h磁控溅射锌的EDS能谱图;((g), (h)) 0.5 h磁控溅射锌元素分布;(i) 1.5 h磁控溅射锌图谱
Figure 3. Microscopic characterization of Zn/fabric electrodes magnetron sputtered zinc: ((a)-(c)) SEM images of 1.5 h magnetron sputtered zinc; ((d)-(f)) EDS energy spectra of 1.5 h magnetron sputtered zinc; ((g), (h)) 0.5 h magnetron sputtered zinc elemental distribution; (i) 1.5 h magnetron sputtered zinc EDS spectrum
图 5 Zn/织物电极的电化学性能曲线:(a) 镀银聚酰胺CV曲线;磁控溅射0.5 h (b)、1 h (c) 和1.5 h (d) 的CV曲线;20 mV/s扫速的不同沉积时间CV对比 (e) 和EIS图谱对比 (f)
Figure 5. Electrochemical performance curve of Zn/fabric electrodes: (a) CV curves of silver-plated polyamide; CV curves of magnetron sputtering 0.5 h (b), 1 h (c) and 1.5 h (d); Comparisons of CV curves (e) and EIS spectra (f) with different magnetron sputtering time of 20 mV/s sweep speed
图 7 C-PPy/织物电极和E-PPy/织物电极的电化学性能曲线:(a) C-PPy/织物电极不同扫速CV;(b) C-PPy/织物电极和E-PPy/织物电极CV对比
Figure 7. Electrochemical performance curves of C-PPy/fabric electrodes and E-PPy/fabric electrodes: (a) Different CV sweep speed of C-PPy/fabric electrodes; (b) Comparison of C-PPy/fabric electrodes and E-PPy/fabric electrodes CV
图 10 Zn@PPy/织物电极的电化学性能:(a) Zn@PPy/织物电极不同扫速CV;(b) 不同织物电极CV对比;(c) Zn@PPy/织物电极EIS;(d) 不同织物电极比电容;(e) Zn@PPy/织物电极恒电流充放电(GCD)
Figure 10. Electrochemical performance curve of Zn@PPy/fabric electrodes: (a) Different scan rate of Zn@PPy/fabric electrodes; (b) Comparison of CV of different fabric electrodes; (c) Zn@PPy/fabric electrodes EIS; (d) Different fabric electrode ratio capacitance; (e) Zn@PPy/fabric electrode galvanostatic charge/discharge (GCD)
Z'—Real impedance; Z''—Imaginary impedance
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