High capacity and durable Li-ion batteries are important for the advancement of electric vehicle and renewable energy technologies. However, durability of high capacity materials such as Si is poor due to volume expansion (e.g. Si expands ≈ 300%) induced stresses and the associated fracture. The binder/active material interface failure is one of the key mechanism that govern capacity fade and electrode cyclic performance. In spite of the importance, no systematic study exists on the interface failure. The existing few studies are mainly qualitative and do not provide predictive capability. In the talk we will present an experimental method to quantify the interface fracture and a theoretical fracture mechanics framework to predict interface failure behavior in battery electrode materials.