Bioinspired Synthesis of Hierarchically Porous MoO2/Mo2C Nanocrystal Decorated N-Doped Carbon Foam for Lithium–Oxygen Batteries
| Autor: | Huixiang Ang, Eileen Fong, Qingyu Yan, Yan Lu |
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| Rok vydání: | 2016 |
| Předmět: |
Battery (electricity)
Materials science General Chemical Engineering Oxygen evolution chemistry.chemical_element Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Electrocatalyst 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Nanocrystal Electrode Materials Chemistry Lithium 0210 nano-technology Bifunctional Carbon |
| Zdroj: | Chemistry of Materials. 28:5743-5752 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/acs.chemmater.6b01966 |
| Popis: | The lithium oxygen (Li–O2) battery is one of the most promising technologies among various electrochemical energy storage systems. The challenge to develop a high-performance Li–O2 battery lies in exploring an air electrode with optimal porous structure and high efficient bifunctional electrocatalyst. The present work demonstrates a bioinspired synthesis route for the preparation of high performance Li–O2 air electrode materials that are made out of N-doped carbon foams decorated with heteronanostructured MoO2/Mo2C nanocrystals (MoO2/Mo2C@3D NCF). Here, recombinant proteins (ELK16-FLAG) facilitated the self-assembly of metal precursors and provided a carbon source for Mo2C formation. The as-prepared MoO2/Mo2C@3D NCF showed superior electrocatalytic activity in both oxygen evolution reaction and oxygen reduction reaction mechanisms with a high round-trip efficiency of 89.1% (2.77 V/3.11 V) at 100 mA g–1 as well as exceptional rate performances and good cyclability in Li–O2 battery. The desirable electroche... |
| Databáze: | OpenAIRE |
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