副教授
硕士生导师
教师拼音名称:yujianhua
学历:博士研究生
学位:工学博士
职称:副教授
毕业院校:中科院上海硅酸盐研究所
邮箱:
2020-06-08 青岛科技大学毕业生最喜爱的老师
2019-12-31 青岛科技大学先进工作者
2016-12-31 青岛科技大学先进工作者
最后更新时间:..
关键字:ACTIVATED CARBON; SURFACE-AREA; BIOMASS; NANOSHEETS; NITROGEN; CAPACITANCE; OXYGEN; CHALLENGES; NANOTUBES; OIL
摘要:The fabrication of carbon materials with low cost and high performance is the main challenge in wide appli-cations of supercapacitors. In this work, facile carbonization and chemical activation processes are developed to convert flixweed seeds to hierarchical porous carbon with large specific surface area and self-doped ample heteroatoms (e.g., nitrogen, sulfur and oxygen). The obtained carbon material demonstrates several advantages in supercapacitors, such as ultrahigh specific capacitance of 662.4 F g-1 at 0.5 A g-1 and long cycling life > 12,000 cycles at 20 A g-1. A symmetric supercapacitor based on the resulting carbon delivers a high energy density of 34 W h kg-1 at 1000 W kg-1 in 1 M Na2SO4. Therefore, flixweed seeds can be economically utilized for large-scale production of porous carbon with excellent supercapacitance performance.
卷号:128
期号:无
是否译文:否