Nitrogen-Doped Porous Carbons As Electrode Materials for High-Performance Supercapacitor and Dye-Sensitized Solar Cell

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• 作者：Lan Wang ; Zhiyong Gao ; Jiuli Chang ; Xiao Liu ; Dapeng Wu ; Fang Xu ; Yuming Guo ; Kai Jiang
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2015
• 出版时间：September 16, 2015
• 年：2015
• 卷：7
• 期：36
• 页码：20234-20244
• 全文大小：630K
• ISSN：1944-8252

文摘

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 掳C, the afforded sample, labeled as a-NC₇₀₀, possesses a specific surface area of 1302 m² g^鈥?, 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^鈥? at a current density of 1 A g^鈥?, 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鈥?.5 Wh kg^鈥? under power densities of 83鈥?609 W kg^鈥?. Moreover, a-NC₇₀₀ also demonstrates high electrocatalytic activity for I₃^{鈥?/sup> 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.}