As the demand for flexible wearable electronic devices increases, the development of light, thin and flexible high-performance energy-storage devices to power them is a research priority. This review highlights the latest research advances in flexible wearable supercapacitors, covering functional classifications such as stretchability, permeability, self-healing and shapememory capabilities, as well as practical studies on energy harvesting capabilities.

The new focus of energy storage: flexible wearable supercapacitors
    Abstract
    1 Introduction
    2 Working principles of flexible wearable supercapacitors
    3 Flexible wearable supercapacitors
        3.1 Electrode materials of flexible supercapacitor
            3.1.1 Carbon materials
            3.1.2 Composite materials
        3.2 Stretchable supercapacitors
            3.2.1 Electrode materials
            3.2.2 Structural design
        3.3 Air-permeable supercapacitors
        3.4 Self-healing supercapacitors
            3.4.1 Substrate-based self-healing supercapacitors
            3.4.2 Electrolyte-based self-healing supercapacitors
            3.4.3 Electrolyte and electrode materials -based self-healing supercapacitors
        3.5 Shape memory supercapacitors
            3.5.1 Shape memory supercapacitors based on SMA
            3.5.2 Shape memory supercapacitors based on SMP
        3.6 Energy harvesting supercapacitors
            3.6.1 Photo-rechargeable supercapacitor (PRSC)
            3.6.2 Mechanical energy harvesting supercapacitors
            3.6.3 Thermoelectric and pyroelectric energy-harvesting supercapacitors
    4 Conclusion and outlook
    Acknowledgements 
    References

• Yani Yan(College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
• Yi Zhou(College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
• Yongfeng Li(College of Biomedical Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
• Yanzhen Liu(Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China)