Eutectic electrolytes show promise for zinc-ion batteries due to their cost-effectiveness and eco-friendliness. However, the design of eutectic electrolytes is challenging due to their high viscosity, low solute solubility, and interface compatibility issues. A novel ternary eutectic electrolyte composed of choline chloride, ethylene glycol, urea and ZnCl₂ is proposed in the study, and the complex interactions and compatibility between these components, and the interface growth principles were revealed systematically through experiments and theoretic simulations. Our research demonstrates the well-designed eutectic electrolyte can integrate optimific solvent-shell structure, favorable electrolyte interface as well as low viscosity perfectly, and can thus improve zinc plating kinetics and suppress dendrite growth, resulting in a durable, dendrite-free zinc electrode lasting over 3000 h. Moreover, Zn||CEU1Zn||PANI full cells also surprisingly achieved over 90 % retention rate after 8000 cycles at a relatively high current density of 2A·g⁻¹. This multi-component eutectic electrolyte presents a promising solution for long-lasting metal-ion battery electrolytes.

共晶电解质因其成本效益和环境友好性而在锌离子电池中显示出前景。然而，由于共晶电解质的高粘度、低溶质溶解度和界面兼容性问题，其设计具有挑战性。该研究提出了一种由氯化胆碱、乙二醇、尿素和ZnCl _{2组成的新型三元共晶电解质，并通过实验和理论模拟系统地揭示了这些组分之间复杂的相互作用和相容性以及界面生长原理。}我们的研究表明，精心设计的共晶电解液可以将优化的溶剂-壳结构、良好的电解液界面以及低粘度完美地结合在一起，从而改善镀锌动力学并抑制枝晶生长，从而获得耐用、无枝晶的锌电极。超过3000小时。^{此外，Zn||CEU1Zn||PANI全电池在2A·g -1}的相对高电流密度下循环8000次后也令人惊讶地实现了超过90%的保留率。这种多组分共晶电解质为持久金属离子电池电解质提供了一种有前途的解决方案。