H3PO4 solution hydrothermal carbonization combined with KOH activation to prepare argy wormwood-based porous carbon for high-performance supercapacitors

作者：Dai, Changchao; Wan, Jiafeng^*; Yang, Juan; Qu, Shanshan; Jin, Tieyu; Ma, Fangwei^*; Shao, Jinqiu

来源：Applied Surface Science, 2018, 444: 105-117.

DOI：10.1016/j.apsusc.2018.02.261

• Porous carbon
• Argy wormwood
• Hydrothermal carbonization
• Activation
• Supercapacitor

In this work, argy wormwood-based porous carbon electrode materials for high-performance supercapacitors are prepared through H3PO4 solution hydrothermal carbonization and subsequent KOH activation. The obtained carbon has a specific surface area (SSA) of 927 m(2) g(-1), a total pore volume of 0.56 cm(3) g(-1), and a high oxygen (9.38%) content. In three-electrode system, it exhibits specific capacitance of 344 F g(-1) at 1 A g(-1). Moreover, the symmetric supercapacitor shows an excellent rate capability of 87% retention from 1 A g(-1) to 10 A g(-1), and a good cycling performance with 91.6% retention over 5000 cycles in 6 M KOH. Therefore, the sample activated by H3PO4 & KOH exhibits an excellent future in energy storage.

• 出版日期2018-6-30
• 单位黑龙江大学