A novel p/n-dopable electrochromic electrode material based on P(TPACz)/WO3 coralloid porous nanocomposite

Abstract

Novel monomer TPACz containing carbazole and triphenylamine active groups was synthesized. P(TPACz)/WO3 coralloid porous electrochromic electrode material were prepared by electropolymerization. The P(TPACz)/WO3 coralloid porous composite electrode material exhibited independent electrochromic properties in the positive potential range (0−1.7 V) (yellow at neutral state and blue at oxidation state) and negative potential range (−1.8−0 V) with the color of the film changing from yellow to dark blue. At the same time, the electrochemical properties of P(TPACz)/WO3 composite material ware tested. It is noteworthy that the P(TPACz)/WO3 coralloid porous electrochromic composite electrode materials exhibit both n-type and p-type doped electrochemical properties. Especially, P(TPACz)/WO3 exhibit excellent capacitive properties in the n-doped state. According to its GCD curve of P(TPACz)/WO3 nanocomposite electrode material, the area ratio capacitance is 1.94 mF cm−2 in the positive potential window of 0−0.8 V. And the area ratio capacitance is 33.3 mF cm−2 in the negative potential window of −1.8−0 V. Therefore, the design and effects of the nanocomposite material can broaden application range of electrochromic electrode materials and provide new strategies for energy saving material design.