Researchers use 3D graphene paper to create metal-free thin-film supercapacitors with 200 V output
Researchers from Guangdong University of Technology and Georgia Institute of Technology recently developed a method to achieve thin-film supercapacitors (TFSCs) without using metal parts or traditional separators. Their tiny 3.8 cm³ device is even capable of outputting 200 volts – enough to light 100 LEDs for 30 seconds or a 3-watt bulb for 7 seconds. The method could help power next-generation microelectronic devices, especially those used in harsh or space-constrained environments.
(a) Schematic diagram of tandem metal-free TFSCs with four fabrication steps included. (b) Assembly diagram of a single TFSC. Image credit: International Journal of Extreme Manufacturing
At the heart of the technology is a simple but effective laser process. The researchers used a CO₂ laser to transform sheets of commercial polyimide (PI) paper into 3D graphene. This graphene paper plays multiple roles: it acts as the energy-storing electrode, the electrical connector, and the structural support, all at once.
Source: https://www.graphene-info.com/researchers-use-3d-graphene-paper-create-metal-free-thin-film-supercapacitors
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