Laminated Object Manufacturing of 3D-Printed Laser-Induced Graphene Foams.

Laser-induced graphene (LIG), a graphene structure synthesized by a one-step process through laser treatment of commercial polyimide (PI) film in an ambient atmosphere, has been shown to be a versatile material in applications ranging from energy storage to water treatment. However, the process as developed produces only a 2D product on the PI substrate. Here, a 3D LIG foam printing process is developed on the basis of laminated object manufacturing, a widely used additive-manufacturing technique.

Lithium Batteries with Nearly Maximum Metal Storage.

The drive for significant advancement in battery capacity and energy density inspired a revisit to the use of Li metal anodes. We report the use of a seamless graphene-carbon nanotube (GCNT) electrode to reversibly store Li metal with complete dendrite formation suppression. The GCNT-Li capacity of 3351 mAh g approaches that of bare Li metal (3861 mAh g), indicating the low contributing mass of GCNT, while yielding a practical areal capacity up to 4 mAh cm and cycle stability.