New Anodic Discoloration Materials Applying Energy-Storage Electrochromic Device.

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Complementary energy storage electrochromic devices (ESECDs) require efficient ion storage layers.
• Traditional materials limit the performance of bi-functional electrochromic batteries.

Purpose of the Study:

• To assess new anodic coloring materials as ion storage layers in ESECDs.
• To enhance the electrochromic storage performance and durability of ESECDs.

Main Methods:

• Fabrication of iridium oxide-doped nickel oxide (Ir:NiO) films using cathodic arc plasma (CAP).
• Investigation of molybdenum trioxide-doped tungsten oxide (Mo:WO3) films with varying Ar/O2 gas flow ratios.
• Construction and testing of 10 × 10 cm2 ESECDs.

Main Results:

• Achieved an optical transmittance modulation (ΔT) of 53.3% in Ir:NiO ESECDs.
• Demonstrated a fast coloration time of 3.58 s and bleaching time of 1.24 s.
• Maintained 45% transmittance modulation after 3000 cycles, indicating high cycling durability.

Conclusions:

• New anodic materials offer a viable alternative to traditional active materials for ESECDs.
• The developed Ir:NiO films significantly improve electrochromic storage performance.
• These findings pave the way for advanced bi-functional electrochromic batteries.