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Ultrasmall Fe 2 O 3 Nanoparticles Anchored on Three‐Dimensional Hierarchical Porous Graphene‐like Networks for High Rate Capability Supercapacitors
Author(s) -
Zhang Zhiping,
Zhang Haiyan,
Chen Yiming,
Li Zhenghui,
Li Yunyong,
Luo Tao,
Wu Qibai,
Xu Yawen,
Zhi Chunyi
Publication year - 2016
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201600393
Subject(s) - supercapacitor , materials science , capacitance , composite number , graphene , electrode , nanoparticle , chemical engineering , electrochemistry , hydrothermal circulation , nanotechnology , porosity , horizontal scan rate , substrate (aquarium) , composite material , cyclic voltammetry , chemistry , oceanography , geology , engineering
An ultrasmall Fe 2 O 3 nanoparticle/three‐dimensional hierarchical porous graphene‐like (Fe 2 O 3 /3D HPG) composite has been synthesized by a facile hydrothermal method, which is investigated as a high performance electrode material for supercapacitors. In the composite, the ultra‐small‐sized Fe 2 O 3 nanoparticles, with an average size of approximately 5 nm, are uniformly distributed on the 3D HPG substrate. The as‐prepared Fe 2 O 3 /3D HPG composite electrode exhibits good electrochemical performance with a maximum specific capacitance of 967 F g −1 at 1.0 A g −1 in the three‐electrode system in 2.0 mol L −1 KOH aqueous solution, and an outstanding rate capability (74 % capacitance retention at 30 A g −1 ). In addition, the composite electrode also exhibits an excellent cycling performance with 92 % capacitance retention of the initial capacity after 5000 cycles at 1.0 A g −1 .