Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 16, Issue 8, Pages 2667-2674Publisher
SPRINGER
DOI: 10.1007/s10008-012-1689-4
Keywords
Nickel oxide/expanded graphite (NiO/EG) nanocomposites; Supercapacitors; Chemical deposition
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Funding
- National Science Foundation of China [21003015, 21103014]
- Science Foundation of Jiangsu Province [BE201113, 2011Z0062]
- Science Foundation of Changzhou [CJ20115020]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
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Nickel oxide/expanded graphite (NiO/EG) nanocomposites with different loading of EG were prepared through chemically depositing Ni(OH)(2) in EG followed by thermal annealing and characterized by scanning electron microscopy (SEM), powder X-ray diffraction (XRD), Brunauer-Emmet-Teller (BET) isotherm and electrochemical measurements. The prepared NiO/EG composites were found to be crystalline and highly porous with high specific surface area and pore volume. SEM analysis reveals uniform porous morphology for NiO in the NiO/EG-60 nanocomposites which shows good specific capacitance (510 F g(-1)) at a current density of 100 mA g(-1) in 6 mol L-1 KOH measured by chronopotentiometry employing a three-electrode system. The specific capacitance retention of the NiO/EG-60 nanocomposites was found to be ca. 95% after 500 continuous galvanostatic charge-discharge cycles, indicating that the NiO/EG nanocomposites can become promising electro-active materials for supercapacitor application.
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