Numerical Simulation Of Stress And Strain At The Interface Between Ion Conductive Polymer And Aluminum Anode

Anodic bonding(also called electrostatic bonding or field assisted bonding),is a method to realize the bonding between dissimilar materials through the interaction process of heat and electricity. At present, the method has been widely used for the bonding between glass and metal.The impact toughness and ionic conductivity of ion-conducting polymer PEO-LiX are stronger than solid electrolyte glasses, and PEO-LiX also has corrosion resistance, etc. as glass-like materials, therefore the bonding technique for ion conducting polymer PEO-LiX to metal has a great prospect.In this paper, the ion-conducting polymer PEO-Li ClO4, PEO-LiPF6 and PEO-LiBF4 were prepared by ball milling, and the optimum process parameters of the ball milling experiment was determined.The X-ray scattering and infrared spectroscopy indicated that the conductive mechanism of PEO-LiClO4 and the LiClO4 content had an impact on the electrical conductivity of PEO-LiClO4, the macro performance of the PEO-LiX/Al interface was examined by the artificial stripping experiment.The micro-structure of the bonding interface was analyzed by scanning electron microscopy, and the results showed that there was a transitional layer in the bonding interface; The EDS results indicated that ion diffusion existed in the bonding interface.The residual stress and strain distribution in the PEO-LiClO4/Al(PEO:Li ClO4=10:1?15:1?20:1) anodic bonding during cooling was analyzed by means of the MSC.Marc, the results were analyzed by the Origin software, the results showed that the more content of lithium salt of the ion conducting polymer PEO-LiX, the smaller stresses and strains values produced during the cooling of anodic bonding relatively. The three-layer PEO-LiClO4/Al/PEO-LiClO4 prepared using the optimal parameter was simulated by the MSC.Marc,The results of the simulation analysis of the bonding structure PEO-LiClO4/Al/PEO-LiClO4 and PEO-LiClO4/Al showed that the three-layer sample had less residual stress and deformation than the two-layer sample because of its symmetric structure.