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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >ITO nanoparticles break optical transparency/high-areal capacitance trade-off for advanced aqueous supercapacitors
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ITO nanoparticles break optical transparency/high-areal capacitance trade-off for advanced aqueous supercapacitors

机译：ITO纳米粒子断开光学透明度/高面积电容折衷，用于高级含水超级电容器

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摘要

The ever-increasing demand for energy storage in portable electronic devices is driving research on supercapacitor technology. In this context, optical transparency and mechanical robustness of supercapacitors are the key properties for the development of next-generation multifunctional devices, such as head-up displays, high-aesthetic touch screens andmonolithic energy conversion/storage integrated systems. Here, we demonstrate that indium tin oxide nanoparticles (ITO NPs) are ideal materials for a facile solution-processed fabrication of transparent/semi-transparent electrodes with high areal capacitance (Careal) in aqueous solutions (1 M Na2SO4), overcoming the crucial trade-off between optical transparency and areal supercapacitor performance. In particular, our ITO NP electrodes exhibit Careal values of 0.40, 0.72 1.53, 3.41, and 6.45 mF cm(-2) at 0.2 mA cm(-2) for a transmittance (T) of 81.9%, 69.7%, 64.4%, 46.6% and 26.7% at 550 nm, respectively. The Careal values at current densities higher than 1.2mA cm(-2) are record-high (i.e., 0.81, 1.76 and 3.17 mF cm (-2) at 10 mA cm(-2) for a T of 64.4%, 46.6% and 26.7% at 550 nm). Indium tin oxide nanoparticle electrodes show 94% capacitance retention over 10 000 charge-discharge cycles. Flexible electrodes are also designed on a polyethylene terephthalate substrate, showing operational activity over 100 bending cycles under curvature radii of 1 and 0.5 cm. Finally, the coating of the ITO NP electrode with a photoactive polymer, i.e., rr-poly(3-hexylthiophene), permits the fabrication of a light-powered supercapacitor, as a clear-cut case of an innovative hybrid electric power delivery device, storing an energy density of 17.54 nW h cm(-2) under simulated sunlight illumination.
机译：不断增加对便携式电子设备中的能量存储需求正在推动超级电容器技术的研究。在这种情况下，超级电容器的光学透明度和机械稳健性是开发下一代多功能器件的关键特性，例如朝上显示器，高美学触摸屏和全球能量转换/存储集成系统。在这里，我们证明了氧化铟锡纳米颗粒（ITO NPS）是用于在水溶液（1M Na 2 SO 4）中具有高面积电容（Careal）的透明/半透明电极的透明/半透明电极的制造的理想材料（1M Na 2 SO 4），克服关键贸易在光学透明度和面部超级电容器性能之间的-off。特别是，我们的ITO NP电极表现出0.40,0.72 1.53,3.41和6.45mF cm（-2）的透射率（t）为81.9％，69.7％，64.4％，分别为550nm的46.6％和26.7％。在高于1.2mA cm（-2）的电流密度下的塞背型（即0.81,1.76和3.17mF cm（-2），在10 mA cm（-2）中，为t6.4％，46.6％ 550 nm的26.7％）。氧化铟锡纳米颗粒电极显示出超过10 000充放电循环的94％电容潴留。柔性电极也设计在聚对苯二甲酸乙二醇酯基底上，显示在1和0.5cm的曲率半径下的100次弯曲循环上的操作活性。最后，用光活性聚合物涂覆ITO NP电极，即RR-Poly（3-己基噻吩）允许制造光源超级电容器，作为创新的混合动力输送装置的透明壳体，在模拟阳光照射下存储17.54 nW H cm（-2）的能量密度。

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