Metal-organic-framework-derived hierarchical Co/CoP-decorated nanoporous carbon polyhedra for robust high-energy storage hybrid supercapacitors
- Authors
- Elayappan, Vijayakumar; Shinde, Pragati A.; Veerasubramani, Ganesh Kumar; Jun, Seong Chan; Noh, Hyun Sung; Kim, Kihyun; Kim, Minkyung; Lee, Haigun
- Issue Date
- 28-1월-2020
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- DALTON TRANSACTIONS, v.49, no.4, pp.1157 - 1166
- Indexed
- SCIE
SCOPUS
- Journal Title
- DALTON TRANSACTIONS
- Volume
- 49
- Number
- 4
- Start Page
- 1157
- End Page
- 1166
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/57940
- DOI
- 10.1039/c9dt04522h
- ISSN
- 1477-9226
- Abstract
- Electrode materials exhibiting nanostructural design, high surface area, tunable pore size, and efficient ion diffusion/transportation are essential for achieving improved electrochemical performance. In this study, we successfully prepared cobalt phosphide and cobalt nanoparticles embedded into nitrogen-doped nanoporous carbon (CoP-CoNC/CC) using a simple precipitation method followed by pyrolysis-phosphatization. Subsequently, we employed CoP-CoNC/CC as the electrode for supercapacitor applications. Notably, the resultant CoP-CoNC/CC displayed a high surface area with tunable porosity. Based on the benefits of the CoP in CoNC/CC, improved electrochemical performance was achieved with a specific capacitance of 975 F g(-1) at 1 mA cm(-2) in a 2 M KOH electrolyte. The assembled hybrid supercapacitor using CoP-CoNC/CC (positive electrode) and activated carbon (AC) (negative electrode) exhibited a specific capacitance of 144 F g(-1), a specific energy of 39.2 W h kg(-1) at 1960 W kg(-1) specific power, with better cyclic stability. The higher performance can be attributed to the synergetic effect between CoP, Co metal, and the nitrogen-doped nanoporous carbon in three-dimensional carbon cloth (CC). These excellent properties make CoP-CoNC/CC a promising electrode for developing future energy-storage devices.
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