自供电柔性电致变色智能窗

Self-Powered Flexible Electrochromic Smart Window.

作者信息

Wang Jin-Long, Sheng Si-Zhe, He Zhen, Wang Rui, Pan Zhao, Zhao Hao-Yu, Liu Jian-Wei, Yu Shu-Hong

机构信息

Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, Institute of Energy, Hefei Comprehensive National Science Center, CAS Center for Excellence in Nanoscience, Department of Chemistry, Institute of Biomimetic Materials and Chemistry, Anhui Engineering Laboratory of Biomimetic Materials, University of Science and Technology of China, Hefei 230026, China.

出版信息

Nano Lett. 2021 Dec 8;21(23):9976-9982. doi: 10.1021/acs.nanolett.1c03438. Epub 2021 Nov 23.

DOI:10.1021/acs.nanolett.1c03438

PMID:34813332

Abstract

Electrochromic devices have attracted considerable interest for smart windows. However, current development suffers from the requirement of the external power sources and rigid ITO substrate, which not only causes additional energy consumption but also limits their applications in flexible devices. Inspired by galvanic cell, we demonstrate a self-powered flexible electrochromic device by integrating Ag/WO nanowire film with the Al sheet. The Ag nanowire film first acted as the electrode to replace the ITO substrate, then coupled with the Al sheet to induce an open-circuit voltage of ∼0.83 V, which is high enough to drive the coloration of WO nanowires. Remarkably, the flexible self-powered electrochromic device only expends ∼6.8 mg/cm of the Al sheet after 450 electrochromic switching cycles and the size can be easily expanded with an area of 20 × 20 cm, offering significant potential applications for the next generation of flexible electrochromic smart window.

摘要

电致变色器件在智能窗领域引起了广泛关注。然而，目前的发展受到外部电源和刚性铟锡氧化物（ITO）衬底的限制，这不仅导致额外的能量消耗，还限制了它们在柔性器件中的应用。受原电池的启发，我们通过将银/氧化钨（Ag/WO）纳米线薄膜与铝板集成，展示了一种自供电的柔性电致变色器件。银纳米线薄膜首先充当电极以替代ITO衬底，然后与铝板耦合以诱导出约0.83 V的开路电压，该电压足以驱动WO纳米线的变色。值得注意的是，这种柔性自供电电致变色器件在450次电致变色切换循环后仅消耗约6.8 mg/cm的铝板，并且尺寸可以轻松扩展至20×20 cm的面积，为下一代柔性电致变色智能窗提供了巨大的潜在应用前景。