Golmohammadi Behrang, Shekaari Hemayat, Zafarani-Moattar Mohammed Taghi
Department of Physical Chemistry, University of Tabriz, Tabriz 5166616471, Iran.
ACS Omega. 2021 Oct 18;6(42):27874-27887. doi: 10.1021/acsomega.1c03517. eCollection 2021 Oct 26.
The development of the Li-ion battery Industry in a green way is crucial for human beings' future. Ionic liquids (ILs) are green cosolvents that could be applied in Li-ion battery electrolytes. A thermodynamic study has been carried out for a Li-ion electrolyte (propylene carbonate (PC) + LiCl and LiBr) in the presence of IL 1-alkyl-3-methylimidazolium thiocyanate [RMIM][SCN] (R = butyl, hexyl, and octyl). The studied thermodynamic properties were density, speed of sound, apparent molar volume, and compressibility. The effect of ILs in propylene carbonate (PC) has been investigated under atmospheric pressure at = (288.15-318.15) K. Also, a microscopic approach using scaled particle theory has been implemented. The solvation effect of lithium halides, LiX (X = Cl, Br), on the volumetric and compressibility properties of the ILs has been studied at 298.15 K. The results show that [OMIM][SCN] has the strongest interactions with PC in the studied ILs and these interactions are more weakened with the addition of LiBr than LiCl. According to the partial molar compressibility results, the systems containing [OMIM][SCN] could be used under pressure more beneficially than other systems from the thermodynamic aspect of view.
锂离子电池产业的绿色发展对人类未来至关重要。离子液体（ILs）是可应用于锂离子电池电解质的绿色共溶剂。已对在离子液体1-烷基-3-甲基咪唑硫氰酸盐[RMIM][SCN]（R = 丁基、己基和辛基）存在下的锂离子电解质（碳酸丙烯酯（PC）+ LiCl和LiBr）进行了热力学研究。所研究的热力学性质包括密度、声速、表观摩尔体积和压缩性。在大气压下，于T = (288.15 - 318.15) K研究了离子液体在碳酸丙烯酯（PC）中的作用。此外，还采用了基于定标粒子理论的微观方法。在298.15 K下研究了卤化锂LiX（X = Cl、Br）对离子液体体积和压缩性性质的溶剂化作用。结果表明，在所研究的离子液体中，[OMIM][SCN]与PC的相互作用最强，并且与添加LiCl相比，添加LiBr时这些相互作用减弱得更多。根据偏摩尔压缩性结果，从热力学角度来看，含有[OMIM][SCN]的体系比其他体系在压力下使用更有益。
