Metallography of Lithium-Ion Battery Coated Foils

Most lithium-ion cells use a graphite anode paired with either a Lithium Iron Phosphate (LFP) or Lithium Nickel Manganese Cobalt (NMC) cathode. During manufacturing, the anode and cathode slurries are coated onto thin metal foils, which makes metallographic inspection a critical quality control step. Metallography enables precise evaluation of key battery performance factors, including adhesion, coating and foil thickness, and porosity. These characteristics directly influence charge-discharge efficiency, energy density, and overall safety, helping manufacturers prevent defects that could otherwise lead to performance loss or hazardous failures.