Thanks to their high efficiency and long cycle life, supercapacitors are increasingly being used in consumer electronics, automotive applications, and beyond. However, these capacitors can suffer damage when subjected to elevated temperatures and mechanical stress. A recent review article [1] outlines various strategies to mitigate such internal damage through self-healing mechanisms-both intrinsic and extrinsic-based on chemical and electrochemical processes. These approaches aim to extend the operational life of supercapacitors and the devices that rely on them. Materials employed as self-healing additives include self-healing polymers and gels, conductive polymers, and nanomaterials such as carbon nanotubes, graphene sheets, and transition metal carbides and nitrides. While notable progress has been made toward developing commercially viable self-healing capacitors, challenges persist, particularly in balancing high electrochemical performance with effective self-healing functionality.

[1]. J. M. Yelwa et al, Academia Green Energy, https://doi.org/10.20935/AcadEnergy7555