Abstract
The electrolyte layer plays an important role in ion transport in electrochromic devices, and the optimized preparation of efficient electrolytes can positively affect the conduction process on the electrode surface and at the electrode-electrolyte interface.In this study, we start from a green perspective while improving the performance. Combined with typical eutectic solvents: choline chloride and urea materials. A suitable ratio favorable for the reaction of Co3O4 film is explored and combined with sodium hydroxide, a traditional electrolyte, to enhance the electrochromic performance.The electrochromic and electrochemical properties of Co3O4 films prepared via the sol-gel method in the novel electrolyte were then evaluated. The results show that the performance has been greatly improved, the transmittance rate is 2.5 times higher than the original, the coloration efficiency is 5.8 times higher than the original, and it is more stable and has higher charging and discharging efficiency. This presents a promising avenue for the advancement of oxide films as bifunctional materials for electrochromism and energy storage. The newly developed electrolyte may prove beneficial in enhancing the performance and stability of electrochromic devices through the use of alkaline electrolytes.
Published Version
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