Recent advances on self-healing materials and batteries

Self-healing is a concept to imitate the healing of biological damage and is considered to be an important property of nextgeneration smart materials. With a huge breakthrough of selfhealing materials in recent years, many devices with integrated self-healing ability are promising due to their intelligence and durability. Among them, self-healing batteries have attracted ever-growing interest due to their remarkable electrochemical performance and broad application prospects. In this article, the state-of-the-art progress in self-healing materials and batteries are summarized. First, this review introduces the main selfhealing mechanisms and corresponding materials. Second, various self-healing batteries including micro and macro selfhealing, are discussed, about their self-healing principles, fabrication techniques, and self-healing performances. Finally, existing challenges and future opportunities are discussed in this thriving field.