Electrochromic capacitive windows (ECW) combining energy storage and electrochromism have attracted considerable interest because of their unique energy-saving and energy-recovery features. Therefore, it is highly desirable to explore an electrode material with excellent electrochromic and energy storage properties simultaneously. Herein, we synthesize an electroactive polyamide containing pentaaniline segments (EPA) in the main chain via oxidative coupling polymerization, which showcases electrochemical optical modulation and high capacitance synchronously. Attributed to non-acidic electrolyte and rational matching with V₂O₅ ion-storage material, the as-fabricated ECW exhibits good dual-band optical modulation performance with high optical contrast of 56.57% at 650 nm (Visible region) and 53.29% at 1250 nm (NIR region), fast optical switching response (<5 s), as well as effective regulation of indoor temperature. The resultant ECW also possesses practical energy storage properties, along with a wide voltage window of 2 V, a large capacitance of 47.26 mF/cm², and outstanding electrochemical cycling durability. In its coloring state, the energy stored in ECW could be utilized to drive small-scale electronic equipment, indicating its energy recovery and reuse feature. In conclusion, the ECW in this work functions as a color-switching smart window and a rechargeable supercapacitor, which exhibits great promise for development in green buildings.

结合储能和电致变色的电致变色电容窗（ECW）因其独特的节能和能量回收特性而引起了人们的广泛关注。因此，非常需要探索一种同时具有优异电致变色和储能性能的电极材料。在此，我们通过氧化偶联聚合合成了主链中含有五苯胺链段（EPA）的电活性聚酰胺，该聚酰胺同时表现出电化学光调制和高电容。_{非酸性电解液，与V 2} O ₅合理搭配离子存储材料，所制造的 ECW 表现出良好的双波段光学调制性能，在 650 nm（可见光区域）和 1250 nm（近红外区域）下光学对比度分别为 56.57% 和 53.29%，快速光学开关响应（<5 s)，以及有效调节室内温度。由此产生的ECW还具有实用的储能特性，以及2 V的宽电压窗口和47.26 mF/cm ^{2的大电容}，以及出色的电化学循环耐久性。在着色状态下，ECW存储的能量可用于驱动小型电子设备，体现出其能量回收和再利用的特性。总之，这项工作中的ECW起到了颜色切换智能窗户和可充电超级电容器的作用，在绿色建筑中展现出了巨大的发展前景。