@article{Zhao2023, 
author = {Lili Zhao and Zhuoan Cai and Xiaoyang Wang and Wenbo Liao and Simin Huang and Lingyun Ye and Jilie Fang and Chunxing Wu and Hao Qiu and Lei Miao},
title = {Constructed TiO2/WO3 heterojunction with strengthened nano-trees structure for highly stable electrochromic energy storage device},
year = {2023},
journal = {Journal of Advanced Ceramics},
volume = {12},
number = {3},
pages = {634-648},
keywords = {energy storage, cycle stability, electrochromic (EC), WO3 nano-trees, TiO2 nanorod arrays (TiO2 NRAs)},
url = {https://www.sciopen.com/article/10.26599/JAC.2023.9220711},
doi = {10.26599/JAC.2023.9220711},
abstract = {Tungsten trioxide (WO3) has been widely regarded as a prospective bifunctional material due to its electrochromic and pseudocapacitive properties, while still facing the dilemma of inadequate cycle stability and trapping-induced degradation. Here, inspired by the trees-strengthening approach, a unique titanium dioxide (TiO2) nanorod arrays strengthened WO3 nano-trees (TWNTs) heterojunction was rationally designed and constructed. In sharp contrast to the transmittance modulation (ΔT) attenuation of primary WO3 nano-trees during cycling, the TWNTs film showed not only excellent electrochromic performance but also fascinating cycle stability (77.35% retention of the initial ΔT after 10,000 cycles). Besides, the trapping-induced degradation could be easily rejuvenated by a potentiostatic de-trapping process. An electrochromic energy storage device (EESD) was further assembled based on the TWNTs film to deliver excellent ΔT (up to 79.5% at 633 nm), fast switching speed (tc/tb =1.9 s/14.8 s), extremely high coloration efficiency value (443.4 cm2·C−1), and long-term cycle stability (over 10,000 charge/discharge cycles). This innovative study provided in-depth insights into the electrochromism nature and a significant step in the realization of stable electrochromic-energy storage application, paving the way for multifunctional smart windows as well as next-generation optoelectronic devices.}
}