摘要
Under"green architecture"principles,electrochromic smart windows are employed to adjust optical transmittance and indoor temperature,yet their high costs limit the wide application.Here,an electrochromic window is driven by a redox flow battery(RFB),where TOC and deposition layers are no longer needed.The transmittance of the electrochromic window is modulated by the state of oxidation(SOC)of aqueous posolyte Fe(phen)_(3)Cl_(2),which is coupled with BTMAP-Vi negolyte in RFB.Under optimized conditions,average CE,VE,and EE reach 93.25%,92.61%,and 86.35%for RFB with a capacity fading rate of 1.57%per cycle.88.66%optical modulation and 9.36 cm^(2)/C coloration efficiency are achieved in the electrochromic process,and 72.34%optical modulation is maintained after 12000 s.Essentially,the indoor temperature declines 3℃for posolyte with 100%SOC when compared with the control experiment using circulating water for a model house.This means minimum electricity of 0.0185 kWh is saved when using an air conditioner to cool a 100 m^(3)house,which corresponds to declined CO_(2)emission(COE)of 0.0185 kg.This work provides a novel and cost-efficient strategy for modulating indoor comfort via electrochromic windows driven by RFB.
基金
supports from the National Natural Science Foundation of China(No.22122108)
the Luohe Xinwang Chemical Co.,Ltd.,China.The“Top-rated Discipline”construction scheme of Shaanxi higher education in China supported part of this work。
