Several hydrophilic ionic liquids dissolved in water with different molalities are studied as “water-in-ionic liquid” supporting electrolytes. They exhibit wide electrochemical stability window from 3 to 4.4 V, high ionic conductivities and good flowability, making them promising supporting electrolytes for aqueous high-voltage rechargeable batteries. In such supporting electrolytes, enhanced redox activities of lithium insertion/extraction in anodic TiO₂ film at low negative potential and Fe³⁺/Fe²⁺ couple at moderate positive potential were observed. Cyclability of an aqueous TiO₂/Fe²⁺ hybrid battery is demonstrated with a voltage of 1.7 V.

研究了几种溶解在不同摩尔浓度的水中的亲水性离子液体，作为“电解质中的水”支持电解质。它们具有3至4.4 V的宽电化学稳定性范围，高离子电导率和良好的流动性，使其成为用于水性高压可充电电池的有希望的支持电解质。在这样的支持电解质中，在低负电势下和在中等正电势下的Fe ³⁺ / Fe ²⁺对中，观察到了锂在阳极TiO ₂膜中的插入/萃取的增强的氧化还原活性。在1.7 V的电压下证明了TiO ₂ / Fe ²⁺水性混合电池的可循环性。