RT Journal Article
SR Electronic
T1 Extraordinary tensile strength and ductility of scalable nanoporous graphene
JF Science Advances
JO Sci Adv
FD American Association for the Advancement of Science
SP eaat6951
DO 10.1126/sciadv.aat6951
VO 5
IS 2
A1 Kashani, Hamzeh
A1 Ito, Yoshikazu
A1 Han, Jiuhui
A1 Liu, Pan
A1 Chen, Mingwei
YR 2019
UL http://advances.sciencemag.org/content/5/2/eaat6951.abstract
AB While the compressive strength-density scaling relationship of ultralight cellular graphene materials has been extensively investigated, high tensile strength and ductility have not been realized in the theoretically strongest carbon materials because of high flaw sensitivity under tension and weak van der Waals interplanar bonding between graphene sheets. In this study, we report that large-scale ultralight nanoporous graphene with three-dimensional bicontinuous nanoarchitecture shows orders of magnitude higher strength and elastic modulus than all reported ultralight carbon materials under both compression and tension. The high-strength nanoporous graphene also exhibits excellent tensile ductility and work hardening, which are comparable to well-designed metamaterials but until now had not been realized in ultralight cellular materials. The excellent mechanical properties of the nanoporous graphene benefit from seamless graphene sheets in the bicontinuous nanoporosity that effectively preserves the intrinsic strength of atomically thick graphene in the three-dimensional cellular nanoarchitecture.