کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1488113 | 1510714 | 2015 | 7 صفحه PDF | دانلود رایگان |
• Ni2P nanoparticles and graphene-modified Ni2P nanocomposites were synthesized.
• Ni2P nanoparticle electrode presents a higher specific capacitance of 600.1 F/g.
• Graphene-modified Ni2P nanocomposites show improved electrochemical properties.
A facile one-step method has been developed to synthesize nickel phosphide (Ni2P) nanoparticles which were further modified by graphene to form graphene-modified Ni2P nanocomposites. All of the synthesized samples were characterized in detail and investigated the corresponding electrochemical properties. Results show that the supercapacitor electrodes based on graphene-modified Ni2P nanocomposites exhibit better electrochemical properties compared to free Ni2P nanoparticles. When the loaded amount of graphene is 5% (wt%), the nanocomposite electrodes show higher specific capacitance, obviously improved cycle stabilization, better rate capability and higher energy density. This enhanced electrochemical behavior results from the graphene-modified Ni2P nanocomposite network structure which not only promotes efficient charge transport and electrolyte diffusion, but also prevents the volume expansion/contraction and corrosion of Ni2P nanoparticles. These encouraging findings demonstrate the possibility of graphene-modified Ni2P nanocomposites for applications in high-performance supercapacitors.
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Journal: Materials Research Bulletin - Volume 61, January 2015, Pages 333–339