Materials scientists have constructed round, pom-pom-like graphene microparticles by spraying graphene oxide droplets into a hot solvent—a process akin to deep-frying (Chem. Mater. 2014, DOI: 10.1021/cm5034244). The technique could provide a simple, versatile means to make electrode materials for batteries and supercapacitors, possibly leading to devices with improved energy and power densities, the researchers say.
Scientists want to use graphene in electrodes because it has excellent conductivity, stability, and high surface area. However, standard graphene production methods yield thin films that aggregate or stack, reducing surface area and making the material difficult to process.
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