Active material layer for all solid state lithium secondary battery containing fibrous carbon and all solid state lithium secondary battery

摘要

Problem to be solved: to provide an active material layer of an all solid state lithium secondary battery which is unlikely to cause ionic conductivity or electron conductivity to decrease even if charging and discharging is repeated.Active materialConductive auxiliaryAn active material layer for all solid state lithium secondary batteries containing at least a solid electrolyte;The active material layer has a voidThe ratio of the conductivity aid in the active material layer is less than 0.1 mass% and less than 5.0% by mass;The conductive auxiliary agent contains fibrous carbon having an average fiber diameter of 10 to 900 nmThe proportion of the fibrous carbon in the conductive auxiliary is 20 mass% or more.No selection