Liu HaoRui, Yang JiKai, Liu ChunLei, Xiang TianZi, Zheng LiuMengHan, Liu GuanXu, Fang JinYing, Mu YiNing, Chen WeiJun
School of Physics, Changchun University of Science and Technology, Changchun 130022, China.
Chongqing Research Institute, Changchun University of Science and Technology, Chongqing 400000, China.
Langmuir. 2024 Oct 15;40(41):21780-21794. doi: 10.1021/acs.langmuir.4c02946. Epub 2024 Oct 3.
Under optical and electrical control, a multifunctional electro-optical dual-control color-changing and energy storage device not only realizes fast color conversion but also achieves good energy storage performance. In this work, Mo-doped WO (Mo-WO) films were prepared by a one-step hydrothermal method, among which the 2 at. % Mo-doped WO film has the best electrochromic and energy storage performance. Meanwhile, TiO/NiO composite films were prepared by the hydrothermal method and electrodeposition method. The TiO/NiO/N719 photoanode was prepared by the dip-dyeing method on the TiO/NiO composite film. The results show that the TiO/NiO-10s/N719 composite film has excellent photoelectric conversion and energy storage properties. Finally, choosing Mo-WO as the cathode and the TiO/NiO/N719 film as the anode, a multifunctional electro-optical dual-control Mo-WO@TiO/NiO/N719 color-changing and energy storage device was constructed. Under electrical control, it shows a fast color switching rate (the coloring/bleaching time is 4.1/2.9 s), excellent coloration efficiency (62.1 cm/C), obviously improved area capacitance (90.4 mF/cm), and excellent cycle stability. Under optical control, it shows a shortened optical response time (the coloring/bleaching is 70.3/158.9 s), excellent coloration efficiency (58.2 cm/C), better area capacitance (51.1 mF/cm), and excellent photoelectric conversion efficiency.
在光电控制下，一种多功能电光双控变色储能器件不仅实现了快速的颜色转换，还具备良好的储能性能。在这项工作中，通过一步水热法制备了Mo掺杂的WO（Mo-WO）薄膜，其中2 at.% Mo掺杂的WO薄膜具有最佳的电致变色和储能性能。同时，采用水热法和电沉积法制备了TiO/NiO复合薄膜。通过浸染法在TiO/NiO复合薄膜上制备了TiO/NiO/N719光阳极。结果表明，TiO/NiO-10s/N719复合薄膜具有优异的光电转换和储能性能。最后，选择Mo-WO作为阴极，TiO/NiO/N719薄膜作为阳极，构建了一种多功能电光双控Mo-WO@TiO/NiO/N719变色储能器件。在电控制下，它显示出快速的颜色切换速率（着色/漂白时间为4.1/2.9 s）、优异的着色效率（62.1 cm²/C）、明显提高的面积电容（90.4 mF/cm²）和优异的循环稳定性。在光控制下，它显示出缩短的光响应时间（着色/漂白为70.3/158.9 s）、优异的着色效率（58.2 cm²/C）、较好的面积电容（51.1 mF/cm²）和优异的光电转换效率。
