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Title: A bi-functional device for self-powered electrochromic window and self-rechargeable transparent battery applications
Authors: Wang, Jinmin
Zhang, Lei
Yu, Le
Jiao, Zhihui
Xie, Huaqing
Lou, Xiong Wen (David)
Sun, Xiao Wei
Keywords: Physical chemistry
Materials science
Issue Date: 2014
Source: Wang, J., Zhang, L., Yu, L., Jiao, Z., Xie, H., Lou, X. W. (D.), et al. (2014). A bi-functional device for self-powered electrochromic window and self-rechargeable transparent battery applications. Nature Communications, 5, 4921-.
Series/Report no.: Nature Communications
Abstract: Electrochromic smart windows are regarded as a good choice for green buildings. However, conventional devices need external biases to operate, which causes additional energy consumption. Here we report a self-powered electrochromic window, which can be used as a self-rechargeable battery. We use ​aluminium to reduce ​Prussian blue (​PB, blue in colour) to Prussian white (PW, colourless) in ​potassium chloride electrolyte, realizing a device capable of self-bleaching. Interestingly, the device can be self-recovered (gaining blue appearance again) by simply disconnecting the ​aluminium and ​PB electrodes, which is due to the spontaneous oxidation of PW to ​PB by the dissolved ​oxygen in aqueous solution. The self-operated bleaching and colouration suggest another important function of the device: a self-rechargeable transparent battery. Thus the PB/aluminium device we report here is bifunctional, that is, it is a self-powered electrochromic window as well as a self-rechargeable transparent battery.
DOI: 10.1038/ncomms5921
Schools: School of Chemical and Biomedical Engineering 
School of Electrical and Electronic Engineering 
Rights: © 2014 Macmillan Publishers.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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