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采用真空蒸发经热处理制备了Ｖ２Ｏ５薄膜，使用二电极恒流法从１Ｍ／ＬＬｉＣｌＯ４的ＰＣ电解质溶液向Ｖ２Ｏ５薄膜注入锂离子，形成ＬｉｘＶ２Ｏ５（０≤ｘ≤０．５４），测量了Ｖ２Ｏ５薄膜近垂直反射和透射光谱，计算了光吸收系数。Ｘ射线衍射分析表明薄膜为微晶结构。吸收系数与光子能量关系曲线中存在两个不同的变化区域，光子能量较高部分，（αｈν）１２与ｈν有线性关系；较低部分，吸收光谱存在一个尾巴。这两个区域的分界能量取决于电子和锂离子的注入量。研究结果表明Ｖ２Ｏ５薄膜阳极电致变色起源于吸收边缘的移动，而阴极电致变色则来源于小极化子的吸收
V2O5 thin films were prepared by vacuum evaporation and heat treatment. Lithium ions were implanted into the V2O5 thin films from 1M / LLiClO4 PC electrolyte solution using a two-electrode constant current method to form LixV2O5 (0≤x≤0.54). V2O5 films were measured for near vertical reflections And transmission spectra, the light absorption coefficient was calculated. X-ray diffraction analysis shows that the film is a microcrystalline structure. There are two different changing regions in the relationship between absorption coefficient and photon energy. The higher part of photon energy, (αhν) 12 has a linear relationship with hν, and the lower part has a tail in absorption spectrum. The demarcation energy of these two regions depends on the injection of electrons and lithium ions. The results show that the anodic electrochromism of V2O5 films originates from the absorption edge and the cathodic electrochromism results from the absorption of the small polaron