期刊
JOURNAL OF POWER SOURCES
卷 414, 期 -, 页码 401-411出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2019.01.026
关键词
Metal-organic framework; Zn-TFBDC; Porous-like amorphous carbon; Specific surface area; Supercapacitors
资金
- National Natural Science Foundation of China [21676022, 21706004]
- Fundamental Research Funds for the Central Universities [BHYC1701A]
In this study, a new porous-like amorphous carbon is obtained via zinc-based fluorinated metal-organic framework as carbon rich source by a template free thermal treatment at 750 degrees C under the nitrogen atmosphere. This porous-like amorphous carbon is further used as cathode material for high-performance supercapacitors. The porous carbon possesses a huge specific surface area of 1234 m(2) g(-1) with ordered mesoporous arrangement. The electrochemical activities of the fabricating materials are assessed by cyclic voltammetry and charge-discharge analysis in 6 M KOH electrolyte. Results reveal that porous-like amorphous carbon displays a superior specific capacitance of 360 and 322 F g(-1) at a scan rate of 1 mV s(-1) and current density of 1 A g(-1), respectively with specific energy density of 70 Wh kg(-1) at a current density of 1 A g(-1), which are much better than the reported porous carbons in the literatures. In addition, this carbon material shows an excellent capacitance retention of 98.6% and 95.8% at the ultra-high current densities of 50 and 100 A g(-1), respectively after 100,000 cycles. Therefore, the outstanding capacitive characteristics with high electrochemical stability of the novel porous-like amorphous carbon demonstrate that it will be a promising electrode material for ultra-fast supercapacitors.
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