In this work, the hydrothermal method was used to prepare Ca-doped V2O5 ion storage films on ITO conductive glass substrates, then V2O5 sol was electrodeposited on CaV2O5/ITO to construct V2O5/CaV2O5/ITO laminated film.The effects of Ca doping levels (5mol%, 10mol%, 15mol%) and heat treatment time (2–6 h) on the structure and electrochromic properties of V2O5 ion storage film were investigated. The ion storage capacity of 10CaV2O5 with 10 mol% Ca2+ was increased by 26.5% compared to pure V2O5/ITO(hy)(71.69 mC·cm-2). CaV2O5/ITO ion storage film possessed a porous structure, in which Ca2+ acted as CaV2O5/ITO has good electrochromic properties because of the porous structure, in which Ca2+ acted as a "pillar support" between V2O5 layers, preventing structural collapse during Li+ insertion/deintercalation. When the heat treatment time was 4 h, the resulting 10CaV2O5/ITO-4 exhibited a three-dimensional network structure of interwoven nanowires. With a significant Li+ ion diffusion coefficient, the response speed becomes shorter, with the bleaching/coloring response times being 2.1s/3.3s. The ion storage capacity Q was increased by 27.4% compared to 10CaV2O5 without heat treatment. After 1000 cycles, the Q value only decreased by 6.4%. Compared to 10CaV2O5/ITO-4, the Q value of V2O5/CaV2O5/ITO laminated ion storage film increased by 32.2%, up to 152.75 mC·cm-2. The diffusion coefficient was the largest, accelerating the diffusion of Li+ ions in the film, with bleaching/coloring response times of 1.2/1.5 s. After 1000 cycles, the ion storage capacity Q only decreased by 5.9%. The optical modulation range (∆T) of the V2O5/CaV2O5/ITO laminated ion storage film is the largest at 66.2%, which is higher than that of CaV2O5/ITO at 42.6%. The excellent performance of V2O5/CaV2O5/ITO ion storage films is attributed to the synergistic effect of laminated structure and Ca2+ doping.

中文翻译：

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采用电沉积水热结合法的高性能 V2O5/CaV2O5/ITO 层压离子存储薄膜


本工作采用水热法在 ITO 导电玻璃基板上制备了 Ca掺杂的 V2O5 离子存储膜，然后将 V2O5 溶胶电沉积在 CaV2O5/ITO 上，构建了 V2O5/CaV2O5/ITO 层压膜。研究了 Ca 掺杂水平 （5mol%、10mol%、15mol%） 和热处理时间 （2–6 h） 对 V2O5 离子存储膜结构和电致变色性能的影响。与纯 V2O5/ITO（hy）（71.69 mC·cm-2） 相比，添加 10 mol% Ca2+ 的 10CaV2O5 的离子存储容量提高了 26.5%。CaV2O5/ITO 离子存储膜具有多孔结构，其中 Ca2+ 充当 CaV2O5/ITO 具有良好的电致变色性能，因为多孔结构，其中 Ca2+ 充当 V2O5 层之间的“支柱支撑”，防止 Li+ 插入/脱嵌过程中的结构塌陷。当热处理时间为 4 h 时，所得的 10CaV2O5/ITO-4 表现出交织纳米线的三维网络结构。具有显著的 Li+ 离子扩散系数时，响应速度变短，漂白/着色响应时间为 2.1 秒/3.3 秒。与未热处理的 10CaV2O5 相比，离子存储容量 Q 提高了 27.4%。1000 次循环后，Q 值仅下降了 6.4%。与 10CaV2O5/ITO-4 相比，V2O5/CaV2O5/ITO 层压离子储存膜的 Q 值提高了 32.2%，达到 152.75 mC·cm-2。扩散系数最大，加速了 Li+ 离子在薄膜中的扩散，漂白/着色响应时间为 1.2/1.5 s。循环 1000 次后，离子存储容量 Q 仅下降了 5.9%。V2O5/CaV2O5/ITO 层压离子存储膜的光调制范围 （∆T） 最大，为 66.2%，高于 CaV2O5/ITO 的 42.6%。 V2O5/CaV2O5/ITO 离子存储膜的优异性能归功于层压结构和 Ca2+ 掺杂的协同效应。