Batch fabrication of mesoporous boron-doped nickel oxide nanoflowers for electrochemical capacitors

Journal Article · Sat Nov 15 00:00:00 EST 2014 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.07.055· OSTI ID:22420648

Yang, Jing-He ^[1]; Yu, Qingtao; Li, Yamin; Mao, Liqun ^[1]; Ma, Ding ^[2]

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1. College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004 (China)
2. Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871 (China)

Highlights: • A new facile liquid-phase method has been employed for synthesis boron-doped NiO nanoflowers. • The specific surface area of NiO is as high as 200 m{sup 2} g{sup −1}. • NiO nanoflowers exhibit a high specific capacitance of ∼1309 F g{sup −1} at a charge and discharge current density of 3 A g{sup −1}. • NiO nanoflowers have excellent cycling ability and even after 2500 cycles there is no significant reduction in specific capacitance. - Abstract: Boron-doped nickel oxide (B-NiO) nanoflowers are prepared by simple thermal decomposition of nickel hydroxide. B-NiO is porous sphere with a diameter of about 400 nm. B-NiO nanoflowers are composed of approximately 30 nm nanoplates and the thickness of the nanosheets is approximately 3 nm. The specific surface area of the material is as high as 200 m{sup 2} g{sup −1} and the pore size distribution curves of B-NiO has three typical peaks in the range of mesoporous (5 nm, 13 nm and 18 nm). As an electrode for supercapacitors, the crystalline B-NiO nanoflowers have favorable characteristics, for instance, a specific capacitance of 1309 F g{sup −1} at a current density of 3 A g{sup −1} and no significant reduction in Coulombic efficiency after 2500 cycles at 37.5 A g{sup −1}. This remarkable electrochemical performance will make B-NiO nanoflowers a promising electrode material for high performance supercapacitors.

• OSTI ID: 22420648
• Journal Information: Materials Research Bulletin, Vol. 59; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
BORON
CAPACITANCE
CAPACITIVE ENERGY STORAGE EQUIPMENT
CAPACITORS
CURRENT DENSITY
DOPED MATERIALS
ELECTROCHEMISTRY
ELECTRODES
FABRICATION
NANOCOMPOSITES
NANOPARTICLES
NANOSTRUCTURES
NICKEL HYDROXIDES
NICKEL OXIDES
PERFORMANCE
POROUS MATERIALS
PYROLYSIS
SHEETS
SPECIFIC SURFACE AREA
THIN FILMS