Magnetite Nanoparticles In-Situ Grown and Clustered on Reduced Graphene Oxide for Supercapacitor Electrodes
Yue Jiang,
Jinxun Han,
Xiaoqin Wei,
Hanzhuo Zhang,
Zhihui Zhang,
Luquan Ren
Affiliations
Yue Jiang
Key Laboratory of Bionic Engineering of Ministry of Education, College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China
Jinxun Han
School of Materials and Physics, China University of Mining & Technology, Xuzhou 221116, China
Xiaoqin Wei
School of Materials and Physics, China University of Mining & Technology, Xuzhou 221116, China
Hanzhuo Zhang
School of Materials and Physics, China University of Mining & Technology, Xuzhou 221116, China
Zhihui Zhang
Key Laboratory of Bionic Engineering of Ministry of Education, College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China
Luquan Ren
Key Laboratory of Bionic Engineering of Ministry of Education, College of Biological and Agricultural Engineering, Jilin University, Changchun 130022, China
Fe3O4 nanoparticles with average sizes of 3–8 nm were in-situ grown and self-assembled as homogeneous clusters on reduced graphene oxide (RGO) via coprecipitation with some additives, where RGO sheets were expanded from restacking and an increased surface area was obtained. The crystallization, purity and growth evolution of as-prepared Fe3O4/RGO nanocomposites were examined and discussed. Supercapacitor performance was investigated in a series of electrochemical tests and compared with pure Fe3O4. In 1 M KOH electrolyte, a high specific capacitance of 317.4 F g−1 at current density of 0.5 A g−1 was achieved, with the cycling stability remaining at 86.9% after 5500 cycles. The improved electrochemical properties of Fe3O4/RGO nanocomposites can be attributed to high electron transport, increased interfaces and positive synergistic effects between Fe3O4 and RGO.