کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1288360 | 1498029 | 2012 | 7 صفحه PDF | دانلود رایگان |
Reduced graphene oxide and NiO composite is prepared by homogeneous coprecipitation and subsequent annealing. Characterizations show that NiO particles have a nanosheet-based microsphere structure and anchor uniformly on the surface of reduced graphene oxide platelets. The RG-O/NiO-based supercapacitors exhibit high specific capacitance of 770 F g−1, and enhanced rate capability. It is found that the electrochemical performance can be enhanced by anchoring NiO particles on the surface of RG-O platelets in the RG-O/NiO composite. This method provides a facile and straightforward approach to distribute NiO nanoparticles onto the surface of RG-O sheets and can be extended to the preparation of other RG-O/metal oxides composite for electrochemical energy storage.
► RG-O/NiO is obtained by a simple method of homogeneous coprecipitation followed by annealing.
► NiO has the morphology of nanosheet-based microspheres which are uniformly distributed on the surface of RG-O platelets.
► As an electrode of supercapacitors, the RG-O/NiO has 770 F g−1 specific capacitance which is much higher than pure NiO or NiO/carbonaceous materials previously reported in the literatures.
► The synthesis method of RG-O/NiO can be extended to the preparation of the RG-O/metal oxide composite for electrochemical energy storage.
Journal: Journal of Power Sources - Volume 203, 1 April 2012, Pages 243–249