A copper-based metal-organic framework/tungsten trioxide with improved coloration efficiency for electrochromic application

Copper-based metal-organic framework/tungsten trioxide (HKUST-1/WO3) was synthesized as an electrochromic material via spin coating and hydrothermal. The electrochromic studies of HKUST-1/WO3 composite revealed a high coloration efficiency (296.4 cm(2)/C) compared to WO3 (85.3 cm(2)/C) and HKUST-1 (36.7 cm(2)/C). HKUST-1/WO3 also demonstrated improved switching kinetics (t(c) = 8.3 s, t(b) = 2.2 s) and great optical contrast (76.6%) at 633 nm. The excellent stability of HKUST-1/WO3 was obtained over 1000 cycles with electrochromic charge retention of 85.9%. The outstanding EC performance of the HKUST-1/WO3 composite was achieved due to the synergistic effect between the HKUST-1 and WO3, which contributed to an efficient Li+ ion insertion/ deinsertion for the coloration/bleaching process of the composite.

Automated summary

The copper-based metal-organic framework/tungsten trioxide (HKUST-1/WO3) composite exhibited high coloration efficiency, excellent switching kinetics, great optical contrast, and outstanding stability, attributed to the synergistic effect between HKUST-1 and WO3.