Maleimide-functionalized metal–organic framework for polysulfide tethering in lithium–sulfur batteries
| Autor: | Jessica Buckner, Angelica Benavidez, David A. Burns, V. Sara Thoi |
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| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Materials science chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Sulfur Redox 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Chemistry (miscellaneous) Covalent bond General Materials Science Metal-organic framework Lithium 0210 nano-technology Maleimide Polysulfide |
| Zdroj: | Materials Advances. 2:2966-2970 |
| ISSN: | 2633-5409 |
| Popis: | Lithium–sulfur (Li–S) batteries have great potential as next generation energy storage devices. However, the redox chemistry mechanism involves the generation of solubilized lithium polysulfides, which can lead to leaching of the active material and, consequently, passivated electrodes and diminished capacities. Chemical tethering of lithium polysulfides to materials in the sulfur cathode is a promising approach for resolving this issue in Li–S batteries. Borrowing from the field of synthetic chemistry, we utilize maleimide functional groups in a Zr-based metal–organic framework to chemically interact with polysulfides through the Michael Addition reaction. A combination of molecular and solid-state spectroscopies confirms covalent attachment of Li2Sx to the maleimide functionality. When integrated into Li–S cathodes, the maleimide-functionalized framework exhibits notable performance enhancements over that of the unfunctionalized material, revealing the promise of polysulfide anchors for Li–S battery cycling. |
| Databáze: | OpenAIRE |
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