Effects of reversible chemical reaction on Li diffusion and stresses in spherical composition-gradient electrodes

摘要: Composition-gradient electrode materials have been proven to be one of the most promising in lithium-ion battery. To study mechanism mechanical degradation spherical composition-gradient electrodes, finite deformation theory and reversible chemical are adopted. In homogeneous electrochemical reaction may increase magnitudes stresses. However, has different influences on stresses resulting from three main inhomogeneous factors—forward rate, backward partial molar volume. The decreasing transition form forward increasing volume can reduce As a result, capacity fading reduced by taking advantage effects factors.