Flexible asymmetrical supercapacitor without charge polarity

Supercapacitors have become the research frontiers of electrochemical energy storage systems because of their high power density and ultra long cycle life, especially the rise of high performance flexible asymmetric supercapacitors (FASCs), which has promoted the development of flexible, portable and wearable electronic devices. But the analysis found that all the reported ASCs are like the two batteries. They need to distinguish the positive and negative poles when charging, and only charge them in one direction. In practical use, misuse of charging direction may seriously damage the structure of capacitors, which can only be avoided by additional engineering protection. On the other hand, the intrinsic conductivity of many electrode materials (pseudopotential or battery material) used in the construction of ASCs is poor, and the ion diffusion is limited in the electrode structure. The capacitance and high rate performance of ASCs are limited. Usually, the complex electrode can be prepared to a certain extent by the more complex physical / chemical synthesis process. Solve the above problems. Therefore, it is very meaningful to design a ASCs electrode with simple structure, high performance (stable, fast charge transfer dynamics), and to build an uncharged polar asymmetric supercapacitor device, both from basic research and practical application.