State Key Laboratory for Modification of Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201600, China
Graphene is an allotrope of carbon consisting of a single layer of carbon atoms by sp2 bond. With excellent mechanical, electrical, thermal and magnetic properties, graphene is being extensively studied in both academic and industrial fields. Graphene fiber is an assembly of graphene nanosheets in onedimensional confined space, which will possess excellent properties originated from graphene. Since the advent of graphene fiber in 2011, a variety of preparation methods have been developed, especially wet spinning. Graphene fibers have already shown great potential in energy conversion and storage, sensing and other fields. The preparation methods and applications of graphene fiber are summarized in this review. Afterwards, the existing difficulties of graphene fiber and the prospects of future development will be discussed in detail.