Electrochromic performance of Ni oxide thin films intercalated with Li+ ions

INERA Workshop: Transition Metal Oxide Thin Films-functional Layers in "Smart windows" and Water Splitting Devices

Wen, Rui-Tao^1 ; Niklasson, Gunnar A.^1 ; Granqvist, Claes G.^1

Department of Engineering Sciences, Ångström Laboratory, Uppsala University, P. O. Box 534, Uppsala

SE-75121, Sweden^1

关键词: As-deposited thin films;    Electrochemical cycle;    Electrochromic performance;    ITO/glass substrates;    Ni oxide;    Porous Ni;    Propylene carbonate;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/559/1/012006/pdf
DOI  :  10.1088/1742-6596/559/1/012006

来源: IOP

【 摘 要 】

Porous Ni oxide thin films were deposited on unheated ITO/glass substrates by sputtering in argon-oxygen. The as-deposited thin films have a cubic NiO structure and still exhibit such a structure after 10,000 electrochemical cycles in 1 M LiClO4in propylene carbonate in the range between 2.0 and 4.1 V vs Li/Li+. Electrochromic performance showed a rapid drop of charge density over the first hundreds of cycles and subsequently a very slow decrease. The charge density was 87% of the initial one after 1,000 cycles and 82% after 10,000 cycles, indicating an extremely slow decay after 1,000 cycles. Optical modulation was also slightly decreased after 10,000 cycles, which is due to the drop of charge density.