Hydrogels are attracting increasing interest and have great potential as electrolytes for flexible supercapacitors (FSCs) in wearable and portable electronic devices. However, for practical applications, hydrogel electrolytes are hampered by factors such as their unsatisfactory temperature tolerance, poor mechanical properties and no self-healing properties. Herein, a novel self-healing and wide temperature-resistant graphene oxide synergistic multi-network polymer-supramolecular (PAM/CMCS/PEG/GO) hydrogel electrolyte is prepared using a one-step radical polymerization method. The design of the cross-linked network structure introduces reversible dynamic interactions that allow the hydrogel electrolyte to have excellent mechanical properties and high self-healing capability. The strong hydrogen bonding in the hydrogel network significantly lowers the freezing point of water and slows down the evaporation of water at high temperatures, thus leading to reliable temperature resistance (−10–90 °C). Meanwhile, the assembled PAM/CMCS/PEG/GO hydrogel electrolyte-based FSC has a high capacitance retention rate; the capacity retention is 83.3% after 6000 charge/discharge cycles, and the capacitance of the FSC retains 92.3% of its original state after 5 cycles of cutting/self-healing.

中文翻译：

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使用氧化石墨烯协同多网络聚合物-超分子水凝胶电解质构建自修复柔性超级电容器


水凝胶引起了越来越多的兴趣，并作为可穿戴和便携式电子设备中柔性超级电容器 （FSC） 的电解质具有巨大潜力。然而，对于实际应用，水凝胶电解质受到诸如耐温性不理想、机械性能差和无自愈性能等因素的阻碍。在此，采用一步自由基聚合法制备了一种新型自修复且耐宽温的氧化石墨烯协同多网络聚合物-超分子 （PAM/CMCS/PEG/GO） 水凝胶电解质。交联网络结构的设计引入了可逆的动态相互作用，使水凝胶电解质具有优异的机械性能和高自愈能力。水凝胶网络中强氢键显着降低了水的冰点并减慢了高温下水分的蒸发，从而实现了可靠的耐温性 （-10–90 °C）。同时，组装的 PAM/CMCS/PEG/GO 水凝胶电解质基 FSC 具有较高的电容保持率;6000 次充放电循环后容量保持率为 83.3%，FSC 的电容在 5 次切割/自愈循环后仍保持其原始状态的 92.3%。