With the development of the flexible electronics

flexible supercapacitors show great potentials for many applications

such as flexible display

energy storage system and wearable electronics. As the energy storage device

the flexible supercapacitors receive serious attentions from the academics and industry. At present

the flexible supercapacitors with one dimensional wire-shaped structure and two dimensional planar structures are the most promising development direction because of their intriguing features.This paper gives an introduction to the development status of various types of flexible supercapacitors

and it also summarizes the research progress of the selection of current collector in flexible supercapacitors. In addition

the main research interests of the functional systems integrated and smart design of the flexible supercapacitors are also reviewed in this paper.