Autonomous Self-Healing of Highly Stretchable Supercapacitors at All Climates

作者：Dai, Jing; Qin, Haili; Dong, Wen-Xuan; Cong, Huai-Ping^*; Yu, Shu-Hong^*

来源：Nano Letters, 2022, 22(15): 6444-6453.

DOI：10.1021/acs.nanolett.2c01635

• stretchable supercapacitors
• autonomous self-healability
• hierarchical conducting structure
• multiple dynamic interactions
• all-climate tolerance

Realizing autonomous self-healing and high stretch-ability of flexible supercapacitors over a wide temperature range remains a big challenge because of simultaneous incorporation of self-healing, stretchable and temperature-tolerant elements into a device as well as unfavorable electrochemical kinetics in harsh conditions. Here, we demonstrate for the first time an autonomous self-healing and intrinsically stretchable supercapacitor that can work at all-climate environments assembled by universally self-healing and highly stretchable organohydrogel electrodes with record-high temperature-invariant conductivity of similar to 965 S/cm. Benefiting from multiple hydrogen bonding and dynamic metal coordination combined with electrochemistry-favorable compo-nents and integrated device configuration, the supercapacitor exhibits outstanding long-term stability, high stretchability, instantaneous and complete capacitive self-healability, and real-time mechanical healing at harsh temperatures from similar to 35 to 80 degrees C. The superiorities in stretchability, self-healability, and all-climate tolerance enable the supercapacitor presented here as the best performer among the flexible supercapacitors reported to date.

• 单位
  中国科学院