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Jiaxing Huang1

1, Northwestern Univ, Evanston, Illinois, United States

Crumpling is a stochastic folding processing that can turn a flat sheet into a paper ball-shaped particle. This unusual morphology is fractal dimensional, and can be strain stiffened under stress, which makes them remarkably aggregation-resistant. It is also a type of hollow structure, of which both the external and internal surface area are accessible. Here I will present a case study of crumpled graphene balls, which are made by capillary compression of graphene-based sheets in evaporating aerosol droplets. The resulting graphene particles exhibits universal solution processability without the need of surface functionalization, and can redisperse in solvent even after being compressed into a pellet. Such properties are advantages for graphene applications in ultracapacitors, batteries, electrocatalysis, solid state extraction and lubrication.

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