Although the hydrogel electrolytes for flexible energy-storage device have made great progress, it still remains a huge challenge to assemble a smart supercapacitor with high ionic conductivity and excellent self-healing when suffering physical damage. Herein, a novel self-healing hydrogel electrolyte (B-PVA/KCl/GO) is designed and prepared through graphite oxide (GO) doped into a diol-borate ester bonding cross-linked poly(vinyl alcohol) network. It is found that the moderate amount of GO-doped into hydrogel (2.3 wt% GO, 47.5 mS/cm) is obviously improved ionic conductivity compared with bare B-PVA/KCl hydrogel (32.6 mS/cm). Interestingly, the B-PVA/KCl/GO hydrogel electrolyte exhibits excellent self-healing capability that can repair its original configuration with 5 min when it is cut. Moreover, the activated carbon-based supercapacitor with B-PVA/KCl/GO hydrogel electrolyte delivers high specific capacitance of 156 F g⁻¹ at 0.3 A g⁻¹ and can also restore its capacitive performances via 7 times healing cycles without external stimulus. The presented work provides a new strategy to construct a flexible and self-healing hydrogel to apply for wearable electronics, smart apparels or flexible robots.

尽管用于柔性储能装置的水凝胶电解质已经取得了长足的进步，但是组装具有高离子电导率和优异的自愈性的智能超级电容器在遭受物理损坏时仍然是一个巨大的挑战。本文中，通过将氧化石墨（GO）掺入二醇-硼酸酯键交联的聚乙烯醇网络中，设计并制备了一种新型的自修复水凝胶电解质（B-PVA / KCl / GO）。结果发现，与裸露的B-PVA / KCl水凝胶（32.6 mS / cm）相比，适量的GO掺杂水凝胶（2.3 wt％GO，47.5 mS / cm）明显改善了离子电导率。有趣的是，B-PVA / KCl / GO水凝胶电解质表现出出色的自修复能力，可以在切割后5分钟内恢复其原始结构。而且，^-1在0.3 A g ^-1时，还可以通过7倍的恢复周期恢复其电容性能，而无需外部刺激。提出的工作为构建可自我穿戴的电子产品，智能服装或柔性机器人的柔性自修复水凝胶提供了一种新的策略。