Hollow Carbon Nanofibers with Inside-outside Decoration of Bi-metallic MOF Derived Ni-Fe Phosphides as Electrode Materials for Asymmetric Supercapacitors

被引:130
作者
Chhetri, Kisan [1 ]
Kim, Taewoo [1 ]
Acharya, Debendra [1 ]
Muthurasu, Alagan [1 ]
Dahal, Bipeen [1 ]
Bhattarai, Roshan Mangal [2 ]
Lohani, Prakash Chandra [1 ]
Pathak, Ishwor [1 ]
Ji, Seongmin [1 ]
Ko, Tae Hoon [1 ]
Kim, Hak Yong [1 ,3 ]
机构
[1] Jeonbuk Natl Univ, Dept Nano Convergence Engn, Jeonju 561756, South Korea
[2] Jeju Natl Univ, Dept Chem & Biol Engn, Jeju 63243, South Korea
[3] Jeonbuk Natl Univ, Dept Organ Mat & Fiber Engn, Jeonju 561756, South Korea
基金
新加坡国家研究基金会;
关键词
Asymmetric supercapacitors; Hollow carbon nanofibers; Bi-metallic metal-organic framework (MOF); Metal phosphides; Energy storage; METAL-ORGANIC FRAMEWORKS; HIGHLY EFFICIENT; LOW-TEMPERATURE; NANOSHEETS; HYBRID; NICOP; OXIDE; CO;
D O I
10.1016/j.cej.2022.138363
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Bi-metallic metal-organic framework (MOF) generated phosphides within and outside the hollow carbon nanofibers (HCNFs) show remarkable potential for energy storage owing to their improved conductivity and high specific capacitance. A novel approach is used to synthesize (Ni-Fe)-P-C on the outer and inner surfaces of HCNFs. The synthesized material's substantial electrochemical performance is owing to the co-existence of numerous Ni and Fe-based redox-active species with porous carbon and open channels from MOF-derived Carbon at HCNFs for fast electrolyte ions/electron diffusion. Consequently, the (Ni-Fe)-P-C@HCNFs electrode has a high specific capacitance of 1392 F g(-1) at 1 A g(-1) and good cycling stability, with capacitance retention of approximately 89 % at 25 A/g. Moreover, after 10,000 cycles, the asymmetric supercapacitor (ASC): (Ni-Fe)-P-C@HCNFs//Fe-P-C@HCNFs has an optimal energy density of 62.7 Wh kg(-1) and a power density of 8238.2 W kg(-1), with cycling stability of 92.4 percent at a high current density of 25 A g(-1).
引用
收藏
页数:11
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