Two-Dimensional Porous Structure of V-Doped NiO with Enhanced Electrochromic Properties

Xuhe Zhan; Feiyu Gao; Qianyu Zhuang; Yani Zhang; Jie Dang

doi:10.1021/acsomega.1c07370

Two-Dimensional Porous Structure of V-Doped NiO with Enhanced Electrochromic Properties

ACS Omega. 2022 Feb 28;7(10):8960-8967. doi: 10.1021/acsomega.1c07370. eCollection 2022 Mar 15.

Authors

Xuhe Zhan¹, Feiyu Gao², Qianyu Zhuang³, Yani Zhang¹, Jie Dang²

Affiliations

¹ National Innovation Center of High Speed Train (Qingdao), Qingdao 266108, P. R. China.
² College of Materials Science and Engineering, Chongqing University, Chongqing 400044, P. R. China.
³ National Innovation (Qingdao) High Speed Train Material Research Institute Co., Ltd., Qingdao 266109, P. R. China.

Abstract

In this work, a two-dimensional porous structure of a V-doped NiO film with excellent electrochromic properties on an ITO substrate was synthesized by a hydrothermal method. The influence of V⁵⁺ ions on the NiO film was explored by adjusting the amount of V doping, including refining the crystal grains, increasing the specific surface area of the film, and accelerating the diffusion rate of OH^- in the film. Compared with the undoped NiO film, a 3 atom % V-doped NiO film comes out with superior electrochromic properties with large optical transmittance modulation (81.9% at 600 nm), fast response times (1.2 and 0.9 s), and excellent cycle stability (90.6%). This work creates innovation direction in the field of intelligent energy-saving window materials with high electrochromic properties.