Just 20 minutes imaging of components distribution on the surface of positive electrode Above image shows an image of positive electrode in Lithium-ion battery analyzed by Raman microscopy. LiCoO2, which is active material, and acetylene black, which is conductive additive, are shown by red and blue image respectively. Within just 20 minutes, components distribution in wide area is obtained by Raman imaging with high-spatial resolution of the order of 350nm. ■Detail of the sample for the measurementA mixture of LiCoO2, acetylene black and polyvinylidene fluoride with N-methylpyrrolidone are coated on both surfaces of alminum film and dried. Observation of components distribution on positive electrode surfaces Following graph shows averaged Raman spectrum in selected area,…