Synthetic Route of C6H11ClN2《Soluble Electrolyte-Coordinated Sulfide Species Revealed in Al-S Batteries by Nuclear Magnetic Resonance Spectroscopy》 was published in 2022. The authors were Jay, Rahul;Jadhav, Ankur L.;Gordon, Leo W.;Messinger, Robert J., and the article was included in《Chemistry of Materials》. The author mentioned the following in the article:
Rechargeable aluminum-sulfur (Al-S) batteries have recently garnered significant interest to the low cost, earth abundance, safety, and high theor. capacity of the electrode materials. However, Al-S batteries exhibit many challenges that plague other metal-sulfur battery systems, including significant capacity fade of the sulfur electrode due to the formation of electrolyte-soluble reaction intermediates. Here, Al-S cells using chloroaluminate-containing ionic liquid electrolytes were investigated up from the mol. level using multidimensional solid-state 27Al MAS NMR spectroscopy, XPS, X-ray diffraction (XRD), and electrochem. measurements. Solid-state 27Al single-pulse NMR measurements acquired on cycled sulfur electrodes containing electrolyte-soaked separator revealed multiple discharge products, which were distinguished into liquid- and solid-phase products based on 27Al chem. exchange and nutation NMR experiments During discharge, electrolyte-soluble sulfide species form that coordinate with the AlCl4– chloroaluminate anions, resulting in (SxAlCl4)y- electrolyte complexes. These electrolyte-coordinated sulfide species persist upon charge, resulting in the loss of active mass that explains the significant capacity fade observed upon galvanostatic cycling. XPS, XRD, and solid-state 27Al NMR measurements reveal that solid amorphous Al2S3 forms reversibly upon discharge. The results highlight the technol. importance of understanding how electrolyte-soluble sulfide species coordinate with the complex electroactive species used in multivalent metal-sulfur batteries, which can affect their reversibility and electrochem. properties. To complete the study, the researchers used 1-Ethyl-3-methyl-1H-imidazol-3-ium chloride (cas: 65039-09-0) .
1-Ethyl-3-methyl-1H-imidazol-3-ium chloride(cas: 65039-09-0) is an imidazolium chloride ionic liquid that can be used as:a solvent as well as catalyst for the depolymerization of oak wood lignin; a solvent in the hydrolysis of hemicellulose (xylan) to xylose using Brønsted acid catalysts.Synthetic Route of C6H11ClN2
Reference:
Imidazole – Wikipedia,
Imidazole | C3H4N2 – PubChem