Mechanical analysis of flexible integrated energy storage devices under bending by the finite element method

Although a great deal of studies focus on the design of flexible energy storage devices (ESDs), their mechanical behaviors under bending states are still not sufficiently investigated, and the understanding of the corresponding structural conversion therefore still lags behind. Here, we systematically and thoroughly investigated the mechanical behaviors of flexible all-in-one ESDs under bending deformation by the finite element method. The influences of thicknesses, Young’s moduli and Poisson’s ratios of electrodes and electrolyte were taken into account. Visualized and quantified results including displacement, strain energy, von Mises stress, and tensile, compressive, and interfacial shear stress are demonstrated and analyzed. Based on these results, significant conclusions are drawn for the design of flexible integrated ESDs with robust mechanical properties. This work will provide guidance for the design of ESDs with high flexibility.