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Improved synthesis of N-ethyl-3,7-bis(trifluoromethyl)phenothiazine
- Source :
- New Journal of Chemistry. 44:11349-11355
- Publication Year :
- 2020
- Publisher :
- Royal Society of Chemistry (RSC), 2020.
-
Abstract
- 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.
- Subjects :
- 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
Subjects
Details
- ISSN :
- 13699261 and 11440546
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- New Journal of Chemistry
- Accession number :
- edsair.doi...........d1d6e976e6523d12251ad099a4714ee1