ABSTRACT Given the non-biodegradable nature of plastic, its recycling and upcycling are critical to ensure effective waste management and resource conservation, with a cradle-to-cradle approach. Herewith, we report a low-effort and nature-friendly upcycling route for plastic waste to manufacture large quantities of graphene nanosheets (GNs) via a two-stage pyrolysis process. To analyze the utility of GNs synthesized by this process, their supercapacitive behavior was studied over different current collectors such as copper tape (CuT), indium tin oxide glass (ITO), graphite sheet (GS), and aluminum sheet (AlS) in PVA-H3PO4 gel electrolyte. Our findings confirm that the AlS current collector displayed superiority and demonstrated the highest specific capacitance of 38.78 F/g with the plastic waste GNs. Thus, the present study shows a cost-effective and sustainable option for propelling a circular economy through waste plastic upcycling with energy storage applications.

中文翻译：

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用于超级电容器应用的废塑料衍生石墨烯纳米片

摘要鉴于塑料的不可生物降解性质，其回收和升级回收对于确保有效的废物管理和资源保护至关重要，采用从摇篮到摇篮的方法。在此，我们报告了一种通过两阶段热解工艺制造大量石墨烯纳米片（GN）的塑料废物的低成本和自然友好的升级回收途径。为了分析通过该工艺合成的 GN 的效用，研究了它们在不同集电器上的超级电容行为，例如 PVA 中的铜带 (CuT)、氧化铟锡玻璃 (ITO)、石墨片 (GS) 和铝片 (AlS) -H3PO4 凝胶电解质。我们的研究结果证实，AlS 集电器显示出优越性，并且与塑料废物 GN 相比，其最高比电容为 38.78 F/g。因此，