The kinetics of the urethane forming reactions of hexamethylene diisocyanate (HDI), 4,4′-dicyclohexyl-methane-diisocyanate (HMDI) and isophorone diisocyanate (IPDI) with butan-1-ol were studied by electrospray ionization mass spectrometry (ESI-MS).
Correction for ‘The kinetics of uncatalyzed and catalyzed urethane forming reactions of aliphatic diisocyanates with butan-1-ol’ by Anett Juhász et al. , New J. Chem. , 2023, 47 , 16096–16107, https://doi.org/10.1039/D3NJ02747C.
In this paper, we report the construction and investigation of 3D printed Li-air batteries consisting of charcoal cathode and cotton texture soaked with different organic solvents containing lithium triflate (LiOTf) electrolyte. Charcoal was found to be appropriate cathode for Li-Air batteries, furthermore, cycling tests showed stable operation over 800 cycles in the cases of dimethyl sulfoxide (DMSO) and diethylene glycol dimethyl ether (DEGME) solvents, while for propylene carbonate (PC) low electrochemical stability was observed. Charging, discharging and long-term discharging steps were mathematically modeled. The electrochemical impedance spectroscopy (EIS) showed Gerischer impedance suggesting intensive oxygen transport at the surface of charcoal cathode. Diffusion, charge transfer and solid electrolyte interphase (SEI) processes were identified by means of distribution of relaxation time (DRT) analysis. In the polypropylene (PP) membrane soaked with LiOTf in DEGME, three different states of Li-ions were identified by 7Li-triple-quantum time proportional phase increment (TQTPPI) NMR measurements. Based on the latter results a mechanism was suggested for the Li-ion transport inside the PP membrane. The activity of charcoal cathode was confirmed by Raman and cyclic voltammetry (CV) measurements.
