期刊
ADVANCED FUNCTIONAL MATERIALS
卷 26, 期 30, 页码 5460-5470出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201600879
关键词
-
类别
资金
- US Air Force Office of Scientific Research under MURI [FA9550-12-1-0037]
- National High-Tech Research and Development Program of China (863 Program) [2012AA03A207]
- China Scholarship Council (CSC)
A hierarchical structure consisting of Ni-Co hydroxide nanopetals (NCHPs) grown on a thin free-standing graphene petal foam (GPF) has been designed and fabricated by a two-step process for pseudocapacitive electrode applications. The mechanical behavior of GPFs has been, for the first time to our knowledge, quantitatively measured from in situ scanning electron microscope characterization of the petal foams during in-plane compression and bending processes. The Young's modulus of a typical GPF is 3.42 GPa, indicating its outstanding mechanical robustness as a nanotemplate. The GPF/NCHP electrodes exhibit volumetric capacitances as high as 765 F cm(-3), equivalent to an areal capacitance of 15.3 F cm(-2) and high rate capability. To assess practical functionality, two-terminal asymmetric solid-state supercapacitors with 3D GPF/NCHPs as positive electrodes are fabricated and shown to exhibit outstanding energy and power densities, with maximum average energy density of approximate to 10 mWh cm(-3) and maximum power density of approximate to 3 W cm(-3), high rate capability (a capacitance retention of approximate to 60% at 100 mA cm(-2)), and excellent long-term cyclic stability (full capacitance retention over 15 000 cycles).
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