Modeling mechanical stress and exfoliation damage in carbon fiber electrodes subjected to cyclic intercalation/deintercalation of lithium ions

Thermal and diffusion induced stresses in a structural battery under galvanostatic cycling

“…In previous work on diffusion-induced stresses in structural batteries, stresses caused by volume change of electrode materials have been studied without considering the thermal effects associated with electrochemical cycling. Pupurs et al [14] studied the diffusioninduced stresses in carbon fibres due to lithium concentration gradients associated with electrochemical cycling. Xu et al [15,16] have developed a numerical framework using a Multiphysics FE-model to study how the internal stresses in 3D structural batteries are affected by volume change of constituents.…”

“…This assumption is made to simplify the analysis and to allow for superposition of load steps. This assumption has been used in other studies [14,15].…”

Enhancement of the electrochemical performance of lithium-ion batteries by SiO2@poly(2-acrylamido-2-methylpropanesulfonic acid) nanosphere addition into a polypropylene membrane

“…Meanwhile, the sulfonic group on the surface of the nanospheres forms hydrogen bonds with a large volume of anions and solvent molecules in the electrolyte, which enables the anions to adsorb on the surface of the nanospheres with a large specic surface area. [43][44][45][46][47][48] As a result, the number of lithium ions increases and the rate of passing through the pores is accelerated, so that the impedance of the membrane immersed in the electrolyte decreases and the ionic conductivity increases (Fig. 4g).…”

Effects of state of charge on elastic properties of 3D structural battery composites

“…Existing work, which deals with computational modelling of structural batteries, focus on modelling the coupling between mechanical and electrochemical response to predict displacements and stresses induced by electrochemical cycling. Pupurs et al [17] studied how the internal stresses in carbon fibres are affected by lithium concentration gradients associated with electrochemical cycling. Johanna Xu et al [18,19] developed a framework in COMSOL for multiphysics modelling of the 3D structural battery to predict internal stresses due to swelling/shrinkage of the constituents related to the electrochemical reactions.…”