Developing hydrogel electrolytes combining enhanced ionic conductivity, great electrolyte/electrode interfacial contact and high electrochemical stability represents the basic demand of flexible electronic devices for cryogenic applications, but is still a formidable challenge at present. Herein, inspired by the antifreeze mechanism of antifreeze proteins (AFP), we developed a facile spatially confined strategy to stabilize water in molecular level so as to prevent freezing meanwhile maintain other critical features of hydrogels at subzero temperature. Meriting from unique AFP-mimetic structure, the polyacrylic acid-DMSO hydrogel prepared by rapid one-pot photo-polymerization embodies merits of excellent flexibility, large ionic conductivity, and strong interfacial adhesiveness with almost all types of surfaces at temperature down to −40 °C. As-assembled supercapacitor delivers remarkable specific capacitance of 73 F g⁻¹ at −40 °C (∼70% of the capacitance at 20 °C), 84.5% of capacitance retention after 5000 charge-discharge cycles at −40 °C, and 85.8% of capacitance retention after 1000 cycles at an extreme bending angle of 180° and −40 °C, evidently manifesting high efficiency/stability toward cyclic charge-discharge operation and structure deformation in cold climates. It is believed that this work will play an exemplary role in designing anti-freezing hydrogel electrolytes for reliable, flexible electronic devices working at extremely cold environments.

开发结合增强的离子电导率、良好的电解质/电极界面接触和高电化学稳定性的水凝胶电解质代表了柔性电子器件在低温应用中的基本需求，但目前仍是一项艰巨的挑战。在此，受抗冻蛋白 (AFP) 的抗冻机制的启发，我们开发了一种简单的空间限制策略来稳定分子水平的水，从而防止冻结，同时在零下温度下保持水凝胶的其他关键特性。凭借独特的AFP模拟结构，通过快速一锅光聚合制备的聚丙烯酸-DMSO水凝胶在低至-40°的温度下具有优异的柔韧性、大的离子电导率和几乎所有类型的表面的强界面粘附性。 C。 -40 °C 时为^-1 （约为 20 °C 时电容的 70%），-40 °C 下 5000 次充放电循环后电容保持率为 84.5%，极端弯曲下 1000 次循环后电容保持率为 85.8% 180°和-40°C的角度，明显表现出在寒冷气候下循环充放电操作和结构变形的高效率/稳定性。相信这项工作将在为在极冷环境下工作的可靠、灵活的电子设备设计防冻水凝胶电解质方面发挥示范作用。