L.Z. Zhang, D. Liu,* Z-S. Wu,* and W.W. Lei*
Energy Storage Materials, 2020, Accepted.
Recently, the rapid progress of flexible electronics has attracted tremendous attention for the potential to revolutionize human lives. Originally, flexible on-chip energy-storage devices, such as micro-supercapacitors, have become the matchable microscale power source for wearable and portable electronics. Herein, latest advances of flexible planar micro-supercapacitors (MSCs) and their integrated system are briefly reviewed. Firstly, the fundamentals of flexible MSCs, including planar and sandwich configuration of MSCs, 1D nanomaterials, 2D nanomaterials, and 2D nanocomposites electrode materials, different kinds of gel polymer electrolytes, microfabrication technologies and performance evaluation metrics are introduced in details. Secondly, the MSCs powered integrated systems for flexible electronics with multifunction of photodetection, gas sensing, motion monitoring, body fluid monitoring and lighting micro-LED are provided successively. Finally, the challenges and opportunities for industry manufacturing technology and practical application of micro-supercapacitors based integrated systems are briefly discussed.