Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 7, Issue 36, Pages 20234-20244Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b05790
Keywords
N-doped porous carbons; graphene; melamine formaldehyde resin; supercapacitor; dye-sensitized solar cell
Funding
- National Science Foundation of China [61204078, 61176004, U1304505]
- Program for Innovative Research Team and Talent (in Science and Technology) in University of Henan Province [13IRTSTHN026, 15HASTIT006]
- Innovation Scientists and Technicians Troop Construction Projects of Henan Province [154200510009]
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Activated N-doped porous carbons (a-NCs) were synthesized by pyrolysis and alkali activation of graphene incorporated melamine formaldehyde resin (MF). The moderate N doping levels, mesopores rich porous texture, and incorporation of graphene enable the applications of a-NCs in surface and conductivity dependent electrode materials for supercapacitor and dye-sensitized solar cell (DSSC). Under optimal activation temperature of 700 degrees C, the afforded sample, labeled as a-NC700, possesses a specific surface area of 1302 m(2) g(-1), a N fraction of 4.5%, and a modest graphitization. When used as a supercapacitor electrode, a-NC700 offers a high specific capacitance of 296 F g(-1) at a current density of 1 A g(-1), an acceptable rate capability, and a high cycling stability in 1 M H2SO4 electrolyte. As a result, a-NC700 supercapacitor delivers energy densities of 5.0-3.5 Wh kg(-1) under power densities of 83-1609 W kg(-1). Moreover, a-NC700 also demonstrates high electrocatalytic activity for I-3(-) reduction. When employed as a counter electrode (CE) of DSSC, a power conversion efficiency (PCE) of 6.9% is achieved, which is comparable to that of the Pt CE based counterpart (7.1%). The excellent capacitive and photovoltaic performances highlight the potential of a-NCs in sustainable energy devices.
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