基于WO3·xH2O与可逆金属电沉积的无色/黑色转换电致变色器件

doi:10.15541/jim20250017

摘要/Abstract

摘要： 利用可逆金属电沉积器件(Reversible metal electrodeposition device, RMED)的电致变色(Electrochromic, EC)智能窗为动态调节光和热的传输提供了一个极具吸引力的替代方案。本工作通过在氟掺杂氧化锡(Fluorine-doped tin oxide, FTO)透明导电玻璃上电沉积WO₃·xH₂O薄膜,再利用Bi/Cu的可逆金属电沉积来构建电致变色器件(Electrochromic device, ECD)。电解质由CuCl₂、BiCl₃、KCl和HCl水溶液组成,为电化学过程和电沉积过程提供必要的成分。该器件可在无色和黑色状态之间快速转换,在570 nm波长处实现了77.0%的光调制幅度。在黑色状态下,电致变色器件在 400~1100 nm范围内呈现出接近零的透过率。此外,在经历 60000 s的着色/褪色循环后,该器件能够维持其初始光调制幅度的 96.6%,展现出良好的循环稳定性。所制备的RMED在开路电压下具有相对较高的稳定性,还拥有出色的隔热性能。这些研究结果为克服循环稳定性差的RMEDs的局限性以及提高ECD的光调制幅度提供了一种解决方案。

关键词: 可逆金属电沉积, 电致变色, WO₃·xH₂O

Abstract: Electrochromic (EC) smart windows utilizing reversible metal electrodeposition device (RMED) offer a compelling alternative for dynamically regulating the transmissions of optical and thermal energy. An EC device (ECD) is constructed by utilizing RME of Bi/Cu on WO₃·xH₂O film electrodeposited onto fluorine-doped tin oxide (FTO) transparent conductive glass. The electrolyte consists of CuCl₂, BiCl₃, KCl and HCl aqueous solution, supplying necessary components for both electrochemical and electrodeposition processes. The device shows the ability to rapidly transition between colorless and black states, which achieves a large optical modulation of 77.0% at 570 nm. In the black state, the ECD exhibits a near-zero transmittance in the wavelength range of 400-1100 nm. Furthermore, the device is able to maintain 96.6% of its initial optical modulation after coloration/bleaching cycling of 60,000 s, exhibiting a good cyclic stability. And this RMED has relatively high stability under open-circuit voltage and also possesses excellent heat insulation performance. The results offer a solution to overcome the limitations of RMEDs that have poor cyclic stability and improve the optical modulation of ECDs.

Key words: reversible metal electrodeposition, electrochromic, WO₃·xH₂O

宛心怡, 王文奇, 李加诚, 赵俊亮, 马董云, 王金敏. 基于WO₃·xH₂O与可逆金属电沉积的无色/黑色转换电致变色器件[J]. 无机材料学报, DOI: 10.15541/jim20250017.

WAN Xinyi, WANG Wenqi, LI Jiacheng, ZHAO Junliang, MA Dongyun, WANG Jinmin. Colorless/Black Switching Electrochromic Device Based on WO3·xH2O and Reversible Metal Electrodeposition[J]. Journal of Inorganic Materials, DOI: 10.15541/jim20250017.

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基于WO₃·xH₂O与可逆金属电沉积的无色/黑色转换电致变色器件

Colorless/Black Switching Electrochromic Device Based on WO3·xH2O and Reversible Metal Electrodeposition

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