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3D Bioplotter Research Papers
3D printing of architectured graphene-based aerogels by cross-linking GO inks with adjustable viscoelasticity for energy storage devices
Three-dimensional (3D) functional graphene-based architecture with superior electrical conductivity and good mechanical strength has promising applications in energy storage and electrics. Viscoelasticity-adjustable inks make it possible to achieve desired 3D architectures with interconnected and continuous interior networks by micro-extrusion printing. In this work, ultra-low-concentration graphene oxide (GO) inks of ~ 15 mg·ml−1 have been obtained and demonstrated in direct 3D printing with a facile cross-linking (direct ink writing). The rheological behavior of the GO strategy by cations, which is the lowest concentration to achieve direct ink writing inks, could be adjusted from 1×104 to 1×105 Pa·s−1 with different concentrations of cations due to strong…
3D printing of free-standing and flexible nitrogen doped graphene/ polyaniline electrode for electrochemical energy storage
Flexible graphene film can be quickly realized by three-dimensional printing (3D printing), which has the potential in functional electronic devices. With a trace of cobalt ions as crosslinker, the graphene oxide sol can be converted into 3D printed ink, overcoming the disadvantage of insufficient viscosity of pure graphene oxide ink. The various graphene architectures were successfully obtained by 3D printing, moreover, graphene/polyaniline composites were obtained by electropolymerization. The specific capacitance of graphene/polyaniline electrode achieved up to 238 F/g at the current density of 0.5 A/g, which was much higher than that of graphene electrode (35 F/g).