Xiao Fei, Yang Shengxiong, Zhang Zheye, Liu Hongfang, Xiao Junwu, Wan Lian, Luo Jun, Wang Shuai, Liu Yunqi
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.
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.
Sci Rep. 2015 Mar 23;5:9359. doi: 10.1038/srep09359.
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.
我们报道了一种可扩展且模块化的方法，用于制备新型三明治结构的石墨烯基纳米复合纸，并探索其作为柔性超级电容器中高性能电极的实际应用。首先通过高度可重复的印刷技术和鼓泡分层法制备了独立且柔性的石墨烯纸，通过该方法，石墨烯纸的面积和厚度可在很宽的范围内自由调节。所制备的石墨烯纸具有一系列独特性能，如高电导率（340 S cm(-1)）、轻质（1 mg cm(-2)）和优异的机械性能。为了提高其超级电容性能，我们通过在石墨烯纸上原位电聚合多孔聚苯胺纳米材料，然后在其表面包裹超薄石墨烯层，制备了独特的三明治结构石墨烯/聚苯胺/石墨烯纸。这种独特的设计策略不仅规避了石墨烯纸双层电容器导致的低储能容量问题，还提高了多孔聚苯胺的倍率性能和循环稳定性。所获得的全固态对称超级电容器展现出高能量密度、高功率密度、优异的循环稳定性和出色的机械柔韧性，证明了其在柔性能量相关器件和可穿戴电子产品中的广泛潜在应用。
