title: Flexible energy-storage devices: design consideration and recent progress.
abstract: Flexible energy-storage devices are attracting increasing attention as they show unique promising advantages, such as flexibility, shape diversity, light weight, and so on; these properties enable applications in portable, flexible, and even wearable electronic devices, including soft electronic products, roll-up displays, and wearable devices. Consequently, considerable effort has been made in recent years to fulfill the requirements of future flexible energy-storage devices, and much progress has been witnessed. This review describes the most recent advances in flexible energy-storage devices, including flexible lithium-ion batteries and flexible supercapacitors. The latest successful examples in flexible lithium-ion batteries and their technological innovations and challenges are reviewed first. This is followed by a detailed overview of the recent progress in flexible supercapacitors based on carbon materials and a number of composites and flexible micro-supercapacitors. Some of the latest achievements regarding interesting integrated energy-storage systems are also reviewed. Further research direction is also proposed to surpass existing technological bottle-necks and realize idealized flexible energy-storage devices.
authors.affiliation: State Key Laboratory for Superlattices and Microstructures, Institution of Semiconductors, Chinese Academy of Science, Beijing, 100083, PR China; Wuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information, Huazhong University of Science and Technology (HUST), Wuhan, 430074, PR China.
authors.forename: Xianfu
authors.initials: X
authors.lastname: Wang
authors.forename: Xihong
authors.initials: X
authors.lastname: Lu
authors.forename: Bin
authors.initials: B
authors.lastname: Liu
authors.forename: Di
authors.initials: D
authors.lastname: Chen
authors.forename: Yexiang
authors.initials: Y
authors.lastname: Tong
authors.forename: Guozhen
authors.initials: G
authors.lastname: Shen
keywords: energy storage; flexible materials; lithium-ion batteries; supercapacitors