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1. A textile product comprising an electrochromic device, the electrochromic device comprising an electrochromic yarn, an ion storage yarn and a power supply, the electrochromic yarn comprising a first flexible conductive yarn and an electrochromic layer coated on a surface layer of the first flexible conductive yarn, the ion storage yarn comprising a second flexible conductive yarn and an ion storage layer coated on a surface layer of the second flexible conductive yarn, the first flexible conductive yarn being electrically connected to a cathode of the power supply, the second flexible conductive yarn being electrically connected to an anode of the power supply, the electrochromic yarn and ion storage yarn being arranged in parallel with each other at a distance along a warp direction to form an electrochromic yarn-ion storage yarn pair, and wherein ions may be transferred between the electrochromic layer and the ion storage layer upon an application of a polarity-switchable voltage from the power supply to the electrochromic yarn and ion storage yarn through an external environment if said external environment is filled with a material capable of conducting ions, the electrochromic layer and the ion storage layer being selected from an inorganic metal oxide or an alloy oxide or a combination thereof, wherein the electrochromic yarn and the ion storage yarn are inlaid in two different sides of a fabric of the textile product to form a woven pattern.
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