کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1287716 | 1497995 | 2013 | 6 صفحه PDF | دانلود رایگان |

• Porous NiO with preferentially oriented structure is synthesized through cathodic deposition.
• Agarose gel is used as a meditative template and conductive carbon sources.
• The composite films exhibit an enhanced reversible capacity and cycling stability as anode materials.
• The improvement is ascribed to the synergetic effects of unique structure between porous NiO and carbonaceous matrix.
A simple strategy is described for the synthesis of nickel oxide embedded in a carbonaceous matrix (NiO/C) using a templated agarose gel thin film, in an attempt to produce an electrode with a large reversible capacity and long cycle stability. The as-prepared films are directly deposited onto stainless steel substrates from a solution of the Ni2+ precursors. Scanning electron microscopy images indicate that the as-synthesized NiO/C has a porous and interconnected structure. The results of X-ray diffraction and Fourier transform-infrared spectroscopy analyses confirm the preferential (111) growth of NiO and the presence of carbonaceous materials. As an anode material for lithium ion batteries, this novel structure plays a positive role in producing a material with a large reversible capacity, high conductivity, and long cyclic stability. The high reversible capacity is maintained at an elevated current density. Even after 100 cycles, the NiO/C anodes deliver more than 600 mAh g−1 at a current density of 718 mA g−1, which is significantly higher than the capacity of commercial graphite anodes. The results indicate the existence of a synergetic effect between the porous NiO layers and the conductive matrix in the composite.
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Journal: Journal of Power Sources - Volume 237, 1 September 2013, Pages 172–177