Partially graphitic hierarchical porous carbon nanofiber for high performance supercapacitors and lithium ion batteries

JOURNAL OF POWER SOURCES

卷:462

Article

Hu, Jing¹  Xu, Zhenglong³  Li, Xiaoyan¹  Liang, Shijing¹  Chen, Yuming¹  Lyu, Linlong¹  Yao, Haimin¹  Lu, Zhouguang²  Zhou, Limin¹ 

[1] Hong Kong Polytech Univ, Dept Mech Engn, Hong Kong, Peoples R China

[2] Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China

[3] Hong Kong Polytech Univ, Dept Ind & Syst Engn, Hong Kong, Peoples R China

关键词: Lithium ion batteries;    Supercapacitors;    Hierarchical porous structure;    Carbon nanofiber;    Electrospinning;   

DOI  :  10.1016/j.jpowsour.2020.228098

来源: Elsevier

【 摘 要 】

Partially graphitic hierarchical porous carbon nanofiber is prepared via electrospinning, pyrolysis, activation and acid treatment of the nascent fiber. The ameliorating structural features of the as-obtained carbon nanofiber, such as a relatively high graphitic degree, a high specific surface area and a large pore volume with hierarchical porous structure, acted synergistically, resulting in excellent electrochemical properties. When applied in supercapacitors, the obtained sample delivers a high specific capacitance of 287 F g(-1 )at 0.5 A g(-1), a high rate capacitance of 196 F g(-1) at 100 A g(-1) and a high capacity retention of 95.4% at 5 A g(-1) after 10,000 cycles. When used as an anode for lithium ion batteries, the prepared electrodes display an exceptionally high reversible capacity of 1495 mAh g(-1) at 0.1 A g(-1), superior cycle stability and an outstanding high-rate capacity of 391 mAh g(-1) at 10 A g(-1) for 1100 cycles. These values demonstrate the superiority of partially graphitic hierarchical porous carbon nanofiber as bi-functional electrodes in supercapacitors and Li-ion batteries with outstanding performance.

【 授权许可】

Free