期刊
ACS APPLIED ENERGY MATERIALS
卷 5, 期 1, 页码 88-97出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.1c02508
关键词
zinc-ion intercalation; multicolor electrochromism; vanadium pentoxide; electrochromic energy storage devices; flexible electrochromic devices
资金
- National Natural Science Foundation of China [61974148]
- Ningbo Science and Technology Innovation 2025 Major Special Project [2020Z002]
This research presents a multifunctional electrochromic energy storage device based on zinc-ion intercalation, showing highly reversible multicolor electrochromism with benefits including high transmittance modulation, excellent coloration efficiency, and superior specific capacitance.
Bifunctional electrochromic devices integrating electro-chromism and energy storage have attracted extensive attention in recent years. Here, zinc-ion-intercalation-based multicolor electrochromic energy storage devices (EESDs) based on a free-standing Zn2+-based polymeric electrolyte membrane (ZPEM) and a nanocrystal-in-glass V2O5 thin film were constructed. Evolution of the interlayer spacing, V-O-related bonds, and chemical compositions of the V2O5 thin films with zinc ion intercalation and deintercalation is elaborated in a liquid Zn(CF3SO3)(2)-propylene carbonate (PC) electrolyte. Impressively, highly reversible multi-electrochromism among greenish-blue, yellowish-green, greenish-yellow, faint-yellow, yellowish-orange, and reddish-orange colors is observed in both flexible V2O5 thin films and flexible ZPEM/V2O5/indium tin oxide (ITO) EESDs, which enjoy the benefits from the free channel originating from the large interlayer spacing, the buffering effect of the amorphous phase in the host nanocrystal-in-glass V2O5 matrix, the robust electrostatic interactions between the host V2O5 and guest Zn2+, and Faradaic redox reactions at the Zn2+/V2O5 active interface. The flexible multicolor EESD based on zinc ion intercalation and deintercalation exhibits remarkable electrochromic and energy storage performance with a high transmittance modulation of 57.88%, an excellent coloration efficiency of 36.91 cm(2) C-1, a superior specific capacitance of 51 mu F cm(-2), an enhanced rate capacity, and a pseudocapacitive feature, making it a promising candidate for cost-efficient, environmentally friendly, and bifunctional electrochromic devices.
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