Pomegranate-like C60@cobalt/nitrogen-codoped porous carbon for high-performance oxygen reduction reaction and lithium-sulfur battery
| Autor: | Muqing Chen, Pingwu Du, Runnan Guan, Jianhua Wu, Ruiguo Cao, Shangfeng Yang, Shiyang Wang, Yalin Lu, Zhanwu Lei |
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| Rok vydání: | 2020 |
| Předmět: |
Battery (electricity)
Fullerene Materials science chemistry.chemical_element Lithium–sulfur battery 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry Electrocatalyst 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Catalysis chemistry Chemical engineering General Materials Science Electrical and Electronic Engineering 0210 nano-technology Cobalt Zeolitic imidazolate framework |
| Zdroj: | Nano Research. 14:2596-2605 |
| ISSN: | 1998-0000 1998-0124 |
| Popis: | Porous carbon materials play essential roles in electrocatalysis and electrochemical energy storage. It is of significant importance to rationally design and tune their porous structure and active sites for achieving high electrochemical activity and stability. Herein, we develop a novel approach to tune the morphology of porous carbon materials (PCM) by embedding fullerene C60, achieving improved performance of oxygen reduction reaction (ORR) and lithium-sulfur (Li-S) battery. Owing to the strong interaction between C60 and imidazole moieties, pomegranate-like hybrid of C60-embedded zeolitic imidazolate framework (ZIF-67) precursor is synthesized, which is further pyrolyzed to form C60-embedded cobalt/nitrogen-codoped porous carbon materials (abbreviated as C60@Co-N-PCM). Remarkably, the unique structure of C60@Co-N-PCM offers excellent ORR electrocatalytic activity and stability in alkaline solutions, outperforming the commercial Pt/C (20 wt.%) catalyst. Besides, C60@Co-N-PCM as a novel cathode delivers a high specific capacity of ∼ 900 mAh·g−1 at 0.2 C rate in Li-S batteries, which is superior to the pristine ZIF-67-derived PCM without embedding C60. |
| Databáze: | OpenAIRE |
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