A self-healing hydrogel derived flexible all-solid-state supercapacitors based on dynamic borate bonds

다국어 초록 (Multilingual Abstract)

Flexible energy storage devices are susceptible to damage, which might result in safety issues. In thispaper, a self-healing flexible P(AAPBA-co-P4-AC) gel electrolyte based on dynamic borate bond crosslinkingstrategy is reported. On the one hand, it is simple to process into complicated shapes or patterns,and on the other hand, it could rapidly return to its original state after stress damage. Even after ten timesself-healing, the gel has the same mechanical properties as the non-damaged gel. Furthermore, this gelcan also be applied in all-solid-state supercapacitors without the need of extra electrolytes. Becausethe gel has a large number of hydroxyl groups, it has a high affinity for the activated carbon electrode,and the supercapacitors can maintain 100% initial performance under various angles or strains. Afterten thousand times cycles charge–discharge, the supercapacitors using the gel after twenty times selfhealingprocess can retain 90% of its initial capacity, which is only 4% lower than the non-damagingsupercapacitors, demonstrating high self-healing ability.