Reduced graphene oxide-induced in-situ uniform growth of hydrated WO_(3) film for enhanced electrochromic performance  

作　　者：Rui Fang Yang Liu Chunyu Shi Huihui Jin Zibo Chen Haohao Sun Ben Lv Daping He Xusheng Zheng Yuli Xiong 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China [2]School of Science,Wuhan University of Technology,Wuhan 430070,China [3]National Synchrotron Radiation Laboratory,University of Science and Technology of China,Hefei 230029,China [4]Sanya Science and Education Innovation Park of Wuhan University of Technology,Sanya 572000,China [5]School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Nano Research》2025年第4期569-577,共9页纳米研究(英文版)

基　　金：supported by the National Natural Science Foundation of China(No.22409155);2024 National College Student Innovation and Entre(No.S202410497001)from Wuhan University of Technology.

摘　　要：WO_(3)-graphene electrochromic materials are widely used in electrochromic devices including smart windows and electronic displays,due to their ability to adjust optical transmittance in the visible and near-infrared ranges under low electrode potential.However,the uniformity of the film remains a challenge for the widely used physical mixing-coating method.In this study,we present a two-dimensional material-assisted synthesis of a porous hydrated WO_(3) film(WH-rGO)based on reduced graphene oxide(rGO)nanosheets and WO_(3)(rGO-WO_(3))seed layer via a hydrothermal method.The incorporation of rGO not only promotes the uniform growth of hydrated WO_(3) film,enhancing ion transport but also introduces oxygen vacancies,creating an efficient conduction pathway for charge transport.The resulting WH-rGO film exhibits impressive performance,achieving 71% optical modulation at 700 nm,with bleaching and coloring times of 4.2 and 1.0 s.The coloration efficiency is calculated at 156.11 cm^(2)·C^(-1),and the optical modulation is maintained at 93% of the initial optical modulation after 1000 cycles applied in the +1.0 and -1.1 V potential ranges.This work offers new insights into the role of oxygen vacancies in enhancing the electrochromic properties of hydrated WO_(3) films through the addition of rGO.It also provides a promising approach for the synthesis of electrochromic materials,facilitating their application in smart window technologies.

关 键 词：electrochromic film hydrated tungsten oxide reduced graphene oxide oxygen vacancy 

分 类 号：O469[理学—凝聚态物理]