The effects of CO₂ on physical and electrochemical properties of deep eutectic solvent (DES) containing Fe(II)/Fe(III) redox couple were studied. At 25°C, the viscosity of the DES decreased from 690.4 cP to 620 cP (10.1% decrease), and the ohmic resistance reduced from 1867 ohm to 1409 ohm (24.5% decrease) with saturated CO₂. The magnitude of the changes reduces with the increase of temperature. Moreover, the cyclic voltammetry curve shows that the addition of CO₂ has no remarkable influence on the reaction kinetics of redox couple in DES. The results reported here imply that CO₂ has positive effects on the physicochemical characteristics of DES, while further studies are needed for being used in a DES electrolyte flow battery.

研究了CO ₂对含Fe（II）/ Fe（III）氧化还原对的深共熔溶剂（DES）的物理和电化学性能的影响。在25°C下，使用饱和CO ₂时，DES的粘度从690.4 cP降低至620 cP（降低10.1％），欧姆电阻从1867 ohm降低至1409 ohm（降低24.5％）。变化的幅度随着温度的升高而减小。此外，循环伏安曲线表明，CO ₂的添加对DES中氧化还原对的反应动力学没有显着影响。此处报道的结果表明，CO ₂对DES的理化特性具有积极影响，而在DES电解液液流电池中需要进一步的研究。