CARBON COATING TREATMENT DEVICE, NEGATIVE-ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERY, MANUFACTURING METHOD THEREFOR, LITHIUM-ION SECONDARY BATTERY, AND ELECTROCHEMICAL CAPACITOR

摘要

The present invention is a carbon coating treatment device that introduces organic gas into a core tube via a gas introduction pipe while stirring starting material particles introduced into the core tube by a stirring blade to thereby coat the starting material particles with a carbon coating, and that is characterized in that the ratio between a time-average volume V1 of a portion located inside the core tube of the stirring blade and a time-average volume V2 of a portion of the stirring blade, the portion being located in a region obtained by, when the inner diameter of the core tube is denoted by R, removing a columnar region the distance of which from the central axis of the core tube is R/10 or less from the inside of the core tube, satisfies the relationship of V2/V1≥0.1. Consequently, the carbon coating treatment device capable of sufficiently coating starting material particles with a uniform carbon coating and capable of manufacturing particles with a carbon coating with good productivity is provided.