Development of N-doped carbons from zeolite-templating route as potential electrode materials for symmetric supercapacitors
来源期刊：International Journal of Minerals Metallurgy and Materials2018年第12期
论文作者：Meng Ren Cheng-yun Zhang Yue-lin Wang Jin-jun Cai
文章页码：1482 - 1492
摘 要：N-doped carbons were fabricated from zeolite-templated carbon via modification with melamine and mild KOH activation. The N-doping treatment and KOH activation slightly lowered the surface areas of pristine zeolite-templated carbon; nonetheless, N-doped carbons with a lower surface area exhibited much higher capacitance and cycling stability as fabricated into symmetric supercapacitor. Significantly, N-doped carbon obtained at 700°C showed a capacitance of 45.7 F/g at 0.1 A/g and 42.0 F/g at 10 A/g for the fabricated supercapacitor with 6 M KOH electrolyte, with 92% retention of initial capacitance as current density increased up to 100-fold. This performance was attributed to the dual contribution of electric double-layer capacitance and pseudo-capacitance. The assembled supercapacitor also exhibited excellent cycling stability, with 91% capacitance retention at 10 A/g after 10000 cycles.
Meng Ren1,2，Cheng-yun Zhang1，Yue-lin Wang1，Jin-jun Cai1,3
1. Hunan Key Laboratory of Environment Friendly Chemical Process Technology, School of Chemical Engineering, Xiangtan University2. State Key Laboratory of Powder Metallurgy, Central South University3. School of Engineering Materials & Science, Queen Mary University of London
摘 要：N-doped carbons were fabricated from zeolite-templated carbon via modification with melamine and mild KOH activation. The N-doping treatment and KOH activation slightly lowered the surface areas of pristine zeolite-templated carbon; nonetheless, N-doped carbons with a lower surface area exhibited much higher capacitance and cycling stability as fabricated into symmetric supercapacitor. Significantly, N-doped carbon obtained at 700°C showed a capacitance of 45.7 F/g at 0.1 A/g and 42.0 F/g at 10 A/g for the fabricated supercapacitor with 6 M KOH electrolyte, with 92% retention of initial capacitance as current density increased up to 100-fold. This performance was attributed to the dual contribution of electric double-layer capacitance and pseudo-capacitance. The assembled supercapacitor also exhibited excellent cycling stability, with 91% capacitance retention at 10 A/g after 10000 cycles.
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