title: Scalable synthesis of freestanding sandwich-structured graphene/polyaniline/graphene nanocomposite paper for flexible all-solid-state supercapacitor.
abstract: We reported a scalable and modular method to prepare a new type of sandwich-structured graphene-based nanohybrid paper and explore its practical application as high-performance electrode in flexible supercapacitor. The freestanding and flexible graphene paper was firstly fabricated by highly reproducible printing technique and bubbling delamination method, by which the area and thickness of the graphene paper can be freely adjusted in a wide range. The as-prepared graphene paper possesses a collection of unique properties of highly electrical conductivity (340 S cm(-1)), light weight (1 mg cm(-2)) and excellent mechanical properties. In order to improve its supercapacitive properties, we have prepared a unique sandwich-structured graphene/polyaniline/graphene paper by in situ electropolymerization of porous polyaniline nanomaterials on graphene paper, followed by wrapping an ultrathin graphene layer on its surface. This unique design strategy not only circumvents the low energy storage capacity resulting from the double-layer capacitor of graphene paper, but also enhances the rate performance and cycling stability of porous polyaniline. The as-obtained all-solid-state symmetric supercapacitor exhibits high energy density, high power density, excellent cycling stability and exceptional mechanical flexibility, demonstrative of its extensive potential applications for flexible energy-related devices and wearable electronics.
authors: Laboratory for Large-Format Battery Materials and System, Ministry of Education Advanced Optoelectronic/Energy Materials and Interface Chemistry Joint Laboratory School of Chemistry &Chemical Engineering Huazhong University of Science and Technology Wuhan 430074, P. R. China.
authors: Fei
authors: F
authors: Xiao
authors: Laboratory for Large-Format Battery Materials and System, Ministry of Education Advanced Optoelectronic/Energy Materials and Interface Chemistry Joint Laboratory School of Chemistry &Chemical Engineering Huazhong University of Science and Technology Wuhan 430074, P. R. China.
authors: Shengxiong
authors: S
authors: Yang
authors: Laboratory for Large-Format Battery Materials and System, Ministry of Education Advanced Optoelectronic/Energy Materials and Interface Chemistry Joint Laboratory School of Chemistry &Chemical Engineering Huazhong University of Science and Technology Wuhan 430074, P. R. China.
authors: Zheye
authors: Z
authors: Zhang
authors: Laboratory for Large-Format Battery Materials and System, Ministry of Education Advanced Optoelectronic/Energy Materials and Interface Chemistry Joint Laboratory School of Chemistry &Chemical Engineering Huazhong University of Science and Technology Wuhan 430074, P. R. China.
authors: Hongfang
authors: H
authors: Liu
authors: Laboratory for Large-Format Battery Materials and System, Ministry of Education Advanced Optoelectronic/Energy Materials and Interface Chemistry Joint Laboratory School of Chemistry &Chemical Engineering Huazhong University of Science and Technology Wuhan 430074, P. R. China.
authors: Junwu
authors: J
authors: Xiao
authors: Laboratory for Large-Format Battery Materials and System, Ministry of Education Advanced Optoelectronic/Energy Materials and Interface Chemistry Joint Laboratory School of Chemistry &Chemical Engineering Huazhong University of Science and Technology Wuhan 430074, P. R. China.
authors: Lian
authors: L
authors: Wan
authors: National Center for Electron Microscopy, School of Materials Science and Engineering, The State Key Laboratory of New Ceramics and Fine Processing, Key Laboratory of Advanced Materials (MOE), Tsinghua University, Beijing 100084, P. R. China.
authors: Jun
authors: J
authors: Luo
authors: Laboratory for Large-Format Battery Materials and System, Ministry of Education Advanced Optoelectronic/Energy Materials and Interface Chemistry Joint Laboratory School of Chemistry &Chemical Engineering Huazhong University of Science and Technology Wuhan 430074, P. R. China.
authors: Shuai
authors: S
authors: Wang
authors: Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences Beijing 100190, P. R. China.
authors: Yunqi
authors: Y
authors: Liu