Cheng Tao, Wu You-Wei, Chen Ya-Li, Zhang Yi-Zhou, Lai Wen-Yong, Huang Wei
Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China.
Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU), 127 West Youyi Road, Xi'an, 710072, Shaanxi, China.
Small. 2019 Aug;15(34):e1901830. doi: 10.1002/smll.201901830. Epub 2019 Jul 11.
Flexible planar micro-supercapacitors (MSCs) with unique loose and porous nanofiber-like electrode structures are fabricated by combining electrochemical deposition with inkjet printing. Benefiting from the resulting porous nanofiber-like structures, the areal capacitance of the inkjet-printed flexible planar MSCs is obviously enhanced to 46.6 mF cm , which is among the highest values ever reported for MSCs. The complicated fabrication process is successfully averted as compared with previously reported best-performing planar MSCs. Besides excellent electrochemical performance, the resultant MSCs also show superior mechanical flexibility. The as-fabricated MSCs can be highly bent to 180° 1000 times with the capacitance retention still up to 86.8%. Intriguingly, because of the remarkable patterning capability of inkjet printing, various modular MSCs in serial and in parallel can be directly and facilely inkjet-printed without using external metal interconnects and tedious procedures. As a consequence, the electrochemical performance can be largely enhanced to better meet the demands of practical applications. Additionally, flexible serial MSCs with exquisite and aesthetic patterns are also inkjet-printed, showing great potential in fashionable wearable electronics. The results suggest a feasible strategy for the facile and cost-effective fabrication of high-performance flexible MSCs via inkjet printing.
通过将电化学沉积与喷墨印刷相结合，制备出具有独特疏松多孔纳米纤维状电极结构的柔性平面微型超级电容器（MSCs）。得益于由此产生的多孔纳米纤维状结构，喷墨印刷的柔性平面MSCs的面积电容显著提高到46.6 mF/cm²，这是MSCs报道的最高值之一。与先前报道的性能最佳的平面MSCs相比，成功避免了复杂的制造工艺。除了优异的电化学性能外，所得的MSCs还表现出卓越的机械柔韧性。所制备的MSCs可以高度弯曲至180°达1000次，电容保持率仍高达86.8%。有趣的是，由于喷墨印刷具有显著的图案化能力，各种串联和并联的模块化MSCs可以直接且轻松地进行喷墨印刷，无需使用外部金属互连和繁琐的程序。因此，电化学性能可以大大提高，以更好地满足实际应用的需求。此外，还喷墨印刷了具有精致美观图案的柔性串联MSCs，在时尚可穿戴电子产品中显示出巨大潜力。结果表明了一种通过喷墨印刷简便且经济高效地制造高性能柔性MSCs的可行策略。
