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Electrochromic Asymmetric Supercapacitor Windows Enable Direct Determination of Energy Status by the Naked Eye
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-09-19 00:00:00 , DOI: 10.1021/acsami.7b10334 Ying Zhong 1 , Zhisheng Chai 1 , Zhimin Liang 1 , Peng Sun 1 , Weiguang Xie 1 , Chuanxi Zhao 1 , Wenjie Mai 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-09-19 00:00:00 , DOI: 10.1021/acsami.7b10334 Ying Zhong 1 , Zhisheng Chai 1 , Zhimin Liang 1 , Peng Sun 1 , Weiguang Xie 1 , Chuanxi Zhao 1 , Wenjie Mai 1
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Because of the popularity of smart electronics, multifunctional energy storage devices, especially electrochromic supercapacitors (SCs), have attracted tremendous research interest. Herein, a solid-state electrochromic asymmetric SC (ASC) window is designed and fabricated by introducing WO3 and polyaniline as the negative and positive electrodes, respectively. The two complementary materials contribute to the outstanding electrochemical and electrochromic performances of the fabricated device. With an operating voltage window of 1.4 V and an areal capacitance of 28.3 mF cm–2, the electrochromic devices show a high energy density of 7.7 × 10–3 mW h cm–2. Meanwhile, they exhibit an obvious and reversible color transition between light green (uncharged state) and dark blue (charged state), with an optical transmittance change between 55 and 12% at a wavelength of 633 nm. Hence, the energy storage level of the ASC is directly related to its color and can be determined by the naked eye, which means it can be incorporated with other energy cells to visual display their energy status. Particularly, a self-powered and color-indicated system is achieved by combining the smart windows with commercial solar cell panels. We believe that the novel electrochromic ASC windows will have great potential application for both smart electronics and smart buildings.
中文翻译：
电致变色不对称超级电容器窗口可通过裸眼直接确定能量状态
由于智能电子设备的普及，多功能储能设备，尤其是电致变色超级电容器（SCs）引起了巨大的研究兴趣。在此，通过分别引入WO 3和聚苯胺作为负电极和正电极来设计和制造固态电致变色不对称SC（ASC）窗。两种互补材料有助于制造的设备具有出色的电化学和电致变色性能。在1.4 V的工作电压窗口和28.3 mF cm –2的面积电容的情况下，电致变色器件显示出7.7×10 –3 mW h cm –2的高能量密度。同时，它们在浅绿色（不带电状态）和深蓝色（带电状态）之间表现出明显且可逆的颜色过渡，在633 nm波长处的透光率在55％和12％之间变化。因此，ASC的能量存储水平与其颜色直接相关，并且可以通过肉眼确定，这意味着它可以与其他能量电池结合使用，以可视方式显示其能量状态。特别是，通过将智能窗户与商用太阳能电池板结合在一起，可以实现自供电和颜色指示的系统。我们相信，新颖的电致变色ASC窗将在智能电子产品和智能建筑中都有巨大的潜在应用。
更新日期：2017-09-19
中文翻译：
电致变色不对称超级电容器窗口可通过裸眼直接确定能量状态
由于智能电子设备的普及，多功能储能设备，尤其是电致变色超级电容器（SCs）引起了巨大的研究兴趣。在此，通过分别引入WO 3和聚苯胺作为负电极和正电极来设计和制造固态电致变色不对称SC（ASC）窗。两种互补材料有助于制造的设备具有出色的电化学和电致变色性能。在1.4 V的工作电压窗口和28.3 mF cm –2的面积电容的情况下，电致变色器件显示出7.7×10 –3 mW h cm –2的高能量密度。同时，它们在浅绿色（不带电状态）和深蓝色（带电状态）之间表现出明显且可逆的颜色过渡，在633 nm波长处的透光率在55％和12％之间变化。因此，ASC的能量存储水平与其颜色直接相关，并且可以通过肉眼确定，这意味着它可以与其他能量电池结合使用，以可视方式显示其能量状态。特别是，通过将智能窗户与商用太阳能电池板结合在一起，可以实现自供电和颜色指示的系统。我们相信，新颖的电致变色ASC窗将在智能电子产品和智能建筑中都有巨大的潜在应用。
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