Vanadium oxide(VO_(X))with tunable interlayer spacing and variable valence states of vanadium ions offers tremendous opportunities in aqueous electrochromic devices but is still challenging.Herein,a poly aniline(PANI)...Vanadium oxide(VO_(X))with tunable interlayer spacing and variable valence states of vanadium ions offers tremendous opportunities in aqueous electrochromic devices but is still challenging.Herein,a poly aniline(PANI)-VO_(X)composite material has been designed,increasing the conductivity and the structure stability.Owning to these virtues,the PANI-VO_(X)composite material achieves a high capacitance of 332 mAh·g^(-1)at 0.1 A·g^(-1)and a superior cycling performance(72%ΔT retention after 500 cycles).Importantly,in-situ Raman spectroscopy has been utilized to reveal the rapid formation of Zn_(3)(OH)_(2)V_(2)O_(7)·nH_(2)O and the reversible change of PANI-VO_(X),which can further assist the development of aqueous electrochromic devices.This work highlights the understanding of the Zn^(2+)electrochromic mechanism and sheds some light on organic-inorganic composite electrochromic materials.展开更多
基金financially supported by the National Natural Science Foundation of China(No.62471271)Shandong Provincial Natural Science Foundation(No.ZR2021YQ42)the Taishan Young Scholar Program of Shandong Province
文摘Vanadium oxide(VO_(X))with tunable interlayer spacing and variable valence states of vanadium ions offers tremendous opportunities in aqueous electrochromic devices but is still challenging.Herein,a poly aniline(PANI)-VO_(X)composite material has been designed,increasing the conductivity and the structure stability.Owning to these virtues,the PANI-VO_(X)composite material achieves a high capacitance of 332 mAh·g^(-1)at 0.1 A·g^(-1)and a superior cycling performance(72%ΔT retention after 500 cycles).Importantly,in-situ Raman spectroscopy has been utilized to reveal the rapid formation of Zn_(3)(OH)_(2)V_(2)O_(7)·nH_(2)O and the reversible change of PANI-VO_(X),which can further assist the development of aqueous electrochromic devices.This work highlights the understanding of the Zn^(2+)electrochromic mechanism and sheds some light on organic-inorganic composite electrochromic materials.
