期刊
ELECTROCHIMICA ACTA
卷 137, 期 -, 页码 26-33出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.05.137
关键词
Graphene oxide; Polypyrrole; Composite; Asymmetric supercapacitor
资金
- National Natural Science Foundation of China [U1205112, 21301060, 61306077]
- Chinese Ministry of Education [20123501110001]
- Huaqiao University [ZQN-PY106]
- Fujian Provincial Key Laboratory of Nanomaterials [NM10-5]
Graphene oxide/polypyrrole (GO/PPy) composite is synthesized by in situ oxidation polymerization of pyrrole (Py) in the presence of GO and used for supercapacitor electrode. The scanning electron microscope (SEM) observes that PPy nanoparticles are uniformly grown on the surfaces of GO sheets, leading to increase both the specific surface area and the electrical conductivity of material. GO/PPy composite exhibits better electrochemical performances than the pure individual components. When the mass ratio of GO to Py is 10:100, the GO/PPy composite electrode shows the highest capacitance of 332.6 F g(-1), and presents high rate capability. An asymmetric supercapacitor is fabricated by using the optimized GO/PPy composite as positive electrode and activated carbon (AC) as negative electrode. The asymmetric supercapacitor can be cycled reversibly in the voltage range of 0-1.6V, and exhibits the maximum energy density of 21.4 Wh kg(-1) at a power density of 453.9 W kg(-1). Furthermore, the GO/PPy//AC asymmetric supercapacitor displays good rate capability and excellent cyclic durability. (C) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据