Upcycling PVDF into Carbon Electrodes for Zinc‐Ion Supercapacitors to Avoid Its Entry into the Ecosystem

Abstract Per‐and polyfluoroalkyl substances (PFAS) pose a global threat due to their environmental persistence and bioaccumulation. Polyvinylidene fluoride (PVDF), as a high‐performance fluoropolymer, is indispensable in many fields and cannot be completely phased out in the short term. This has led to a dilemma between the necessity of PVDF and its environmental risks throughout its life cycle, which has become a core bottleneck in the regulation of fluorochemicals. In light of this, this study converts recycled PVDF into microparticles for application in the field of supercapacitor energy storage. The prepared electrode with PVDF micro‐particles not only achieves an ultra‐high mass loading of 100 mg cm −2 , an ultra‐high specific capacitance of 31.4 mAh cm −2 , and ultra‐long cycling of more than 15 000 cycles, but also realizes an ultra‐high energy density of 29.7 mWh cm −2 . Meanwhile, the end‐of‐life electrodes could be recycled as fluorinated salt. This route not only provides a promising direction to deal with hazardous PVDF waste disposal but also significantly improves the load capacity and energy storage efficiency of supercapacitors. This research opens up a new strategy for the up‐recycling of PVDF materials and has far‐reaching significance in promoting the development of eco‐friendly material science and energy storage technology.