Electrode for lithium ion secondary battery and lithium ion secondary battery

An electrode for a lithium ion secondary battery comprising a collector, an active-material layer formed on the collector and a protecting layer formed on the active-material layer, wherein

• the protecting layer contains an organic particle and an inorganic particle,
• the organic particle has a melting temperature of 100 to 200° C.,
• the organic particle and the inorganic particle each have an average particle size (D50) of 0.10 to 4.0 μm, and
• a ratio of a content of the organic particle relative to a content of the inorganic particle in the protecting layer is 1:1 to 1:4, in terms of mass.

A lithium ion secondary battery comprising a positive electrode and a negative electrode, wherein

• at least one of the positive electrode and the negative electrode is an electrode having a collector, an active-material layer formed on the collector and a protecting layer formed on the active-material layer,
• the protecting layer contains an organic particle and an inorganic particle,
• the organic particle has a melting temperature of 100 to 200° C.,
• the organic particle and the inorganic particle each have an average particle size (D50) of 0.10 to 4.0 μm, and
• a ratio of a content of the organic particle relative to content of the inorganic particle in the protecting layer is 1:1 to 1:4, in terms of mass.

A lithium ion secondary battery comprising

• a pair of electrodes facing each other, and
• a separator interposed between the electrodes,
• wherein at least one of the electrodes has a protecting layer, an active-material containing layer and a collector sequentially from the separator,
• the protecting layer contains a silicone resin particle having at least one of structural units represented by RSiO1.5 and R2SiO (in the formula, R represents an alkyl group having 1 to 6 carbon atoms or a phenyl group).