Researchers develop high-capacitance graphene films for improved supercapacitors
Researchers from China’s Dalian Jiaotong University and South China Academy of Advanced Optoelectronics have developed a graphene-based electrode for supercapacitors using a novel slit evaporation self-assembly process. The resulting freestanding sulfuric acid-treated reduced graphene oxide/commercial graphene (S-ATrGO/CG) films demonstrate excellent energy storage capabilities and durability, potentially benefitting graphene-enhanced supercapacitors.
The team introduced a capillary slit-assisted self-assembly method that leverages narrow glass slits to guide the controlled stacking of graphene flakes during solvent evaporation. This process promotes highly ordered, laminated structures, reducing the common issue of flake restacking that limits ion transport in conventional graphene films. Capillary forces, combined with π–π interactions and electrostatic attraction, ensure that sulfuric acid-treated graphene oxide (ATGO) and commercial graphene (CG) align into continuous, freestanding films with high structural integrity.
Source: https://www.graphene-info.com/researchers-develop-high-capacitance-graphene-films-improved-supercapacitors
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