Boosting the electrochromic properties by large V_(2)O_(5)nanobelts interlayer spacing tuned via PEDOT  

作　　者：Haohao Sun Wenxuan Wang Yuli Xiong Zelang Jian Wen Chen 

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]Sanya Science and Education Innovation Park of Wuhan University of Technology,Sanya 572000,China

出　　处：《Chinese Chemical Letters》2024年第9期408-413,共6页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.51972258);Hubei Natural Science Foundation(No.2020CFB774);Open Fund by Sanya Science and Education Innovation Park of Wuhan University of Technology(No.2021KF0021);the Fundamental Research Funds for the Central Universities(No.WUT:20221VA002)。

摘　　要：Vanadium pentoxide(V_(2)O_(5))with a layered structure is of great interest in the field of electrochromic(EC)due to its abundance of color variations.However,there are still a series of problems such as slow ion diffusion,poor electronic conductivity and cyclic stability in the reaction process.Herein,we successfully prepared a stable and fast multi-color electrochromic material V_(2)O_(5)-PEDOT by a simple“one-pot”method.The layer space of V_(2)O_(5)could be tuned by 3,4-ethylenedioxythiophene(named V_(2)O_(5)-PEDOT)during the dissolution and recrystallization of vanadium oxide.The expanded layer spacing facilitates rapid ion insertion and extraction.PEDOT serves as an internal conductive pillar to improve the overall conductivity of the material.The obtained intercrossing structure of the nanobelts shortens the ion diffusion distance and ensures electrolyte penetration.The V_(2)O_(5)-PEDOT exhibits the fast response time(1.1 s for coloration and 3.5 s for bleaching at 422 nm),high optical contrast(ΔT=45%at 422 nm andΔT=35.2%at 1000 nm),great coloration efficiency(CE=97.1 cm2/C),and high cyclic stability(86%preserved after 3000 cycles).The electrochromic devices(ECD)were successfully assembled by using V_(2)O_(5)-PEDOT films as ion storage layers and electrochromic layers,demonstrating remarkable performance.

关 键 词：Vanadium oxide PEDOT NANOBELTS Interlayer spacing Electrochromic 

分 类 号：TB34[一般工业技术—材料科学与工程]