The study of electrochromic materials has far-reaching significance for the regulation of light and heat as well as the reduction of energy consumption. In this study, rGO-Co-NiO composite films were prepared by combining graphene oxide, which has excellent conductivity and stability, with Co-NiO films. The particle size, band gap, conductivity and response time of the electrochromic films were improved by precisely adjusting the component modulation amount of graphene oxide. The results show that with the incorporation of GO it is easy to form oxygen vacancies, which is conducive to ionic conduction and diffusion, in which the film with a GO doping concentration of 4 % has excellent performances in terms of response time and coloring efficiency, and the response time is reduced from 10.2 to 5.8 seconds, and it still possesses 57.25 % of the light modulation amplitude after 600 cycles, of which the attenuation rate is only 2 % for the period from 100 to 600 cycles, The coloring efficiency after 100 cycles is 48.21 cm/C. In summary, the investigated rGO-Co-NiO composite films have a broad potential for future application in electrochromic devices.

中文翻译：

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rGO-Co-NiO复合薄膜的制备及性能：低衰减、高着色效率


电致变色材料的研究对于光热调控以及降低能耗具有深远的意义。本研究将具有优异导电性和稳定性的氧化石墨烯与Co-NiO薄膜相结合，制备了rGO-Co-NiO复合薄膜。通过精确调节氧化石墨烯的组分调制量，改善了电致变色薄膜的粒径、带隙、电导率和响应时间。结果表明，GO的掺入很容易形成氧空位，有利于离子传导和扩散，其中GO掺杂浓度为4%的薄膜在响应时间和着色效率方面具有优异的性能，响应时间由10.2秒缩短至5.8秒，600次循环后仍拥有57.25%的调光幅度，其中100-600次循环衰减率仅为2%，100次后的着色效率循环次数为48.21cm/C。总之，所研究的rGO-Co-NiO复合薄膜在电致变色器件中具有广阔的应用前景。