Continuous crystalline graphene papers with gigapascal strength by intercalation modulated plasticization
Li Peng, Mincheng Yang, Yingjun Liu, Huasong Qin, Jingran Liu, Zhen Xu, Yilun Liu, Fanxu Meng, Jiahao Lin, Fang Wang, Chao Gao, Fang Wang, Chao Gao
Abstract
Abstract Graphene has an extremely high in-plane strength yet considerable out-of-plane softness. High crystalline order of graphene assemblies is desired to utilize their in-plane properties, however, challenged by the easy formation of chaotic wrinkles for the intrinsic softness. Here, we find an intercalation modulated plasticization phenomenon, present a continuous plasticization stretching method to regulate spontaneous wrinkles of graphene sheets into crystalline orders, and fabricate continuous graphene papers with a high Hermans’ order of 0.93. The crystalline graphene paper exhibits superior mechanical (tensile strength of 1.1 GPa, stiffness of 62.8 GPa) and conductive properties (electrical conductivity of 1.1 × 10 5 S m −1 , thermal conductivity of 109.11 W m −1 K −1 ). We extend the ultrastrong graphene papers to the realistic laminated composites and achieve high strength combining with attractive conductive and electromagnetic shielding performance. The intercalation modulated plasticity is revealed as a vital state of graphene assemblies, contributing to their industrial processing as metals and plastics.