Biomimetic and Radially Symmetric Graphene Aerogel for Flexible Electronics. (7th August 2019)

• Record Type: Journal Article
• Authors: Gao, Libo; Fan, Rong; Zhou, Wenzhao; Hu, Xinkang; Cao, Ke; Wang, Weidong; Lu, Yang
• Is Part Of: Advanced Electronic Materials. Volume 5:Number 12(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2019-08-07
• Subjects: biomimetic structures -- flexible electronics -- graphene fibers -- graphene oxide -- supercapacitors; Materials -- Electric properties -- Periodicals; Materials science -- Periodicals; Magnetic materials -- Periodicals; Electronic apparatus and appliances -- Periodicals; 537
• DOI: 10.1002/aelm.201900353
• Languages: English
• ISSNs: 2199-160X

Abstract

Abstract: Developing a generalized route to effectively fabricate periodic mechanically flexible graphene aerogels across several size orders and whole structural integrity on a large scale for flexible electronics is still a challenge. Herein, inspired by bamboo's natural hierarchical structure, a general method is developed to effectively fabricate biomimetic cellular graphene fibers using hydrogen bubbles and ice simultaneously as templates, whose whole size ranges from micro to several centimeters. Owing to its superior mechanical flexibility demonstrated by the in situ scanning electron microscope test and intrinsically good electrical conductivity, its potential in flexible electronics such as sensors, supercapacitors, and Ni–Zn batteries is carefully investigated. It not only shows superior sensitivity in the monitoring of the pulse pressure in sensor devices but also directly serves as a promising binder, flexible scaffold, and conductive additive, as well as extra active material in the energy storage device without any extra additives. This strategy can also be extended to fabricate other configurations of graphene aerogels such as spring‐like type and bulk film, able to serve as the next generation of intelligent infrastructure for achieving multifunctional structural and functional tasks. Abstract : A hollow and biomimetic graphene aerogel is created with superior mechanical flexibility and employed to fabricate novel portable sensor and energy storage devices that display high sensitivity and energy densities, respectively. The dimension of graphene is readily tuned and thus able to serve as the next generation of intelligent infrastructure for achieving multifunctional structural and functional tasks.