Research On Self-powered Flexible Composite Electronic Skin System Suitable For Artificial Intelligence Technology

With the rapid development of science and technology,electronic devices are gradually showing the trend of being intelligent,miniaturized and portable.Electronic skin（e-skin）is a kind of artificial skin,which has great potential application value in many fields such as sensors,signal monitoring and human-computer interaction.However,e-skin’s special applications place high demands on its power modules.As a brand-new research field,nano-energy uses new technologies and micro-nano materials to efficiently collect and store energy in the environment.Nano-generator is a new type of energy harvesting and self-driven sensing technology,which is combined with e-skin to solve Power problems can play a crucial role.This thesis presents a new type of self-driven flexible compound e-skin system.The system can not only be used as a self-driven sensor to detect physical signals in real time,but also as a stable power supply for other electronic devices.It is suitable for many artificial intelligence fields such as human-computer interaction,intelligent sensing and signal monitoring.In this thesis,the electrode materials,triboelectric materials and piezoelectric materials of the composite e-skin system are first studied.On this basis,single-electrode mode triboelectric nanogenerators（SE-TENG）and piezoelectric nanogenerators are constructed.（PENG）model.Secondly,the structure model and working mechanism of the e-skin system are discussed in depth.The key to structural design is to achieve ultra-thin structure with all-round stretchability and high electrical output characteristics to meet the system requirements.In this thesis,the electrode and piezoelectric material PVDF are designed into a serpentine network structure,which greatly improves the stretching as the triboelectric material,Ecoflex with excellent transparency and stretchability is selected,which not only meets the needs of self-driving,but also has the positioning function.Based on the working mechanism of SE-TENG and PENG,the overall working mechanism of e-skin system is analyzed in detail,and the rationality of e-skin as a wearable device is proved.After that,the theoretical analysis of the e-skin system is conducted to prove that its output characteristics are affected by materials and external factors.Finally,the electrical output characteristics of the e-skin system were tested and analyzed on the experimental platform.Tests show that the open circuit voltage V_OC of e-skin can reach 100 V,the short circuit current I_SC can reach 10μA,and the power density is as high as 1 m W/cm².Through the analysis of e-skin electrical output characteristics and positioning function,it proves its applicability in the field of artificial intelligence such as human-computer interaction,intelligent sensing and signal monitoring,with great potential value and broad application prospects.