期刊
JOURNAL OF POWER SOURCES
卷 343, 期 -, 页码 60-66出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2017.01.034
关键词
Diffusion driven layer-by-layer assembly; Polyaniline; Supercapacitor; Graphene oxide
资金
- National Natural Science Foundation of China [51403094]
- China Scholarship Council [201408210052]
- Institute for Integrated Cell-Material Sciences (iCeMS
- Kyoto University)
- JSPS KAKENHI [24681019, 25000007]
- Grants-in-Aid for Scientific Research [25000007, 24681019] Funding Source: KAKEN
As a simple and versatile method, diffusion driven Layer-by-Layer assembly (dd-LbL) is developed to assemble graphene oxide (GO) into three-dimensional (3D) structure. The assembled GO macrostructure can be reduced through a hydrothermal treatment and used as a high volumetric capacitance electrode in supercapacitors. In this report we use rGO framework created from dd-LbL as a scaffold for in situ polymerization of aniline within the pores of the framework to form rGO/polyaniline (rGO/PANI) composite. The rGO/PANI composite affords a robust and porous structure, which facilitates electrolyte diffusion and exhibits excellent electrochemical performance as binder-free electrodes in a sandwich configuration supercapacitor. Combining electric double layer capacitance and pseudo-capacitance, rGO/PANI electrodes exhibit a specific capacitance of 438.8 F g(-1), at discharge rate of 5 mA (mass of electrodes were 10.0 mg, 0.5 A g(-1)) in 1 mol L-1 H2SO4 electrolyte; furthermore, the generated PANI nanoparticles in rGO template achieve a higher capacitance of 763 F g(-1). The rGO/PANI composite electrodes also show an improved recyclability, 76.5% of capacitance retains after recycled 2000 times. (C) 2017 Elsevier B.V. All rights reserved.
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