| abstract |
(57) [Summary] (Modified) [Problem] Changes in battery dimensions, increase in internal resistance due to expansion and contraction of active material due to charging and discharging of lithium secondary batteries, Another object of the present invention is to effectively suppress problems such as deterioration of charge / discharge performance at a large current and improve cycle life. A lithium secondary battery in which at least one of a positive electrode active material and a negative electrode active material is coated with a coating layer containing a conductive agent and an inorganic solid electrolyte. A step of attaching or bonding the coating material particles to the surface of the active material particles, heating the active material particles, softening, melting, or fusing each particle of the inorganic solid electrolyte on the active material particles, and cooling the same. Then, a method of manufacturing a lithium secondary battery having a step of bonding or fusing and integrating each particle of the inorganic solid electrolyte. |