Graphene fiber (GF) integrates the remarkable properties of individual graphene sheets into useful, macroscopic ensemble, which possesses the characteristics such as mechanical flexibility for textiles while maintaining the advantages over conventional carbon fibers such as low cost, light weight, shapeability, and ease of functionalization for various applications. This paper summarizes the significant advances in GFs during recent years, including the tunable and controllable preparation of GFs with functionality and their remarkable applications to unconventional devices, such as flexible fiber-type actuators, robots, motors, photovoltaic cells and supercapacitors.

graphene  /  fiber  /  controllable preparation