With the advent of multifunctional devices with electrochromic (EC) behavior and electrochemical energy storage, complementary design of film structures using inorganic–organic materials has shown great potential for developing EC energy storage devices. Herein, hybrid films consisting of WO₃·H₂O nanoparticle (WHNP)-embedded chitosan thin films on amorphous WO₃ (a-WO₃) films were designed. By exploiting the hybrid effect of chitosan and WHNPs to generate unique chemical cross-linking between them, the designed films exhibited attractive EC behaviors compared to bare a-WO₃ films. These included fast switching speeds (4.0 s for coloration and 0.8 s for bleaching) due to enhanced electrical conductivity and Li-ion diffusivity, high coloration efficiency (62.4 cm²/C) as a result of increased electrochemical activity, and superb long-cycling retention (91.5%) after 1000 cycles due to improved electrochemical stability. In addition, hybrid films exhibited a noticeable energy storage performance with a high specific capacitance (154.0 F/g at a current density of 2 A/g) and a stable rate capability as a result of improved electrochemical activity and fast electrical conductivity, respectively. This resulted in brighter illumination intensity for the 1.5-V white-light-emitting diode due to improved energy density compared to a bare a-WO₃ film. Therefore, the results suggest a new design strategy for materials to realize the coincident application of multifunctional devices with EC energy storage performance.

随着具有电致变色（EC）行为和电化学能量存储功能的多功能设备的问世，使用无机有机材料的膜结构的互补设计显示出开发EC能量存储设备的巨大潜力。在此，设计了由在无定形WO ₃（a-WO ₃）膜上包埋有WO ₃ ·H ₂ O纳米粒子（WHNP）的壳聚糖薄膜组成的杂化膜。通过利用壳聚糖和WHNP的杂化作用在它们之间产生独特的化学交联，与裸露的a-WO ₃相比，设计的膜表现出有吸引力的EC行为。电影。其中包括由于提高的电导率和锂离子扩散率而实现的快速切换速度（用于着色的着色时间为4.0 s，用于漂白的着色时间为0.8 s），由于电化学活性的提高而导致的高着色效率（62.4 cm ² / C）和出色的长循环性由于改善的电化学稳定性，在1000次循环后保留率（91.5％）。另外，由于改进的电化学活性和快速的电导率，混合膜表现出显着的能量存储性能，具有高的比电容（在2A / g的电流密度下为154.0F / g）和稳定的倍率能力。与裸露的a-WO ₃相比，由于提高了能量密度，因此导致1.5V白光发光二极管的照明强度更亮电影。因此，结果提出了一种新的材料设计策略，以实现具有EC储能性能的多功能设备的同步应用。