Improved synthesis of N-ethyl-3,7-bis(trifluoromethyl)phenothiazine
| Autor: | N. Harsha Attanayake, Selin Ergun, Aman Preet Kaur, Susan A. Odom, Matthew D. Casselman, Sean Parkin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Overcharge Trifluoromethyl Salt (chemistry) 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Redox Medicinal chemistry Catalysis 0104 chemical sciences chemistry.chemical_compound Radical ion chemistry Phenothiazine Materials Chemistry Carbonate Graphite 0210 nano-technology |
| Zdroj: | New Journal of Chemistry. 44:11349-11355 |
| ISSN: | 1369-9261 1144-0546 |
| DOI: | 10.1039/d0nj00184h |
| Popis: | N-Ethyl-3,7-bis(trifluoromethyl)phenothiazine is a highly soluble redox shuttle for overcharge protection in lithium-ion batteries with an oxidation potential of ca. 3.8 V vs. Li+/0 in carbonate solvents. This compound has enabled extensive overcharge protection of LiFePO4/graphite cells and does so at high charging rates at high concentrations. Our initial synthesis of this compound suffered from low yields and difficult purifications. Here we report a cleaner, higher-yielding synthesis and additional characterization of the product and its stable radical cation salt. |
| Databáze: | OpenAIRE |
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