Activated carbon from nitrogen rich watermelon rind for high-performance supercapacitors

作者：Mo, Ru-Juan; Zhao, Yang^*; Wu, Min^*; Xiao, Hong-Mei; Kuga, Shigenori; Huang, Yong; Li, Jin-Pei; Fu, Shao-Yun

来源：RSC Advances, 2016, 6(64): 59333-59342.

DOI：10.1039/c6ra10719b

• CHEMICAL-VAPOR-DEPOSITION
• COAL-TAR PITCH
• POROUS CARBON
• GRAPHENE NANOSHEETS
• MESOPOROUS CARBONS
• BIOMASS WASTE
• ELECTRODES
• CAPACITANCE
• TEMPLATE
• AEROGELS

Watermelon rind (WR) is proposed as a nitrogen rich precursor of nitrogen-doped activated carbon (WRAC) for possible energy storage applications in supercapacitors. The WRAC gives rise to a large surface area of up to 2277 m(2) g(-1) and provides an efficient pathway for ions to diffuse into the interior surfaces of bulk electrodes. The nitrogen-doped WRAC electrode gives a high gravimetric specific capacitance (333.42 F g(-1)) in 6 M KOH at a current density of 1 A g(-1) with an adequate nitrogen content of 2.48%, in which the specific capacitance is higher than most previously reported synthetic nitrogen-doped carbon materials. It also exhibits excellent high rate performance, low impedance and good cycle stability (96.82% capacitance reserved after 10 000 cycles). These excellent electrochemical performances are attributed to the high surface area, unique pore size distribution and appropriate nitrogen content.

• 出版日期2016
• 单位重庆大学; 中国科学院理化技术研究所; 中国科学院大学