A Full-Device Autonomous Self-Healing Stretchable Soft Battery from Self-Bonded Eutectogels.

Next-generation energy storage devices should be soft, stretchable and self-healable. Previously reported self-healable batteries mostly possess limited stretchability and rely on healable electrodes or electrolytes rather than achieving full-device self-healability. Herein, we report an all-component self-bonding strategy to obtain an all-eutectogel soft battery (AESB) that simultaneously achieves full-cell autonomous self-healability and omnidirectional intrinsic stretchability (>1000% areal strain) over a broad temperature range (-20 to 60°C). Without requiring any external stimulus, the five-layered soft battery can efficiently recover both its mechanical and electrochemical performance at full-cell level. The developed AESB can be easily configured into various three-dimensional architectures with highly interfacial compatible eutectogel electrodes, electrolyte and substrate, presenting an excellent opportunity for the development of embodied energy technologies. The present work provides a general and user-friendly soft electronic material platform for fabricating a variety of intrinsic self-healing stretchable multi-layered electronics, which are promising beyond the field of energy storage, such as displays, sensors, circuits and soft robots. This article is protected by copyright. All rights reserved.