Additives for electrochemical devices, binder compositions for electrochemical devices, slurry compositions for electrochemical devices, electrodes for electrochemical devices, and electrochemical devices

摘要

An additive for an electrochemical device capable of securing a high degree of safety of an electrochemical device is provided. As an additive for an electrochemical device used in an electrochemical device, the temperature at which the volume expansion ratio is more than twice is more than 150°C and less than 400°C, and (A) the content of each element belonging to group 2 of the periodic table is 100 mass is less than ppm, (B) the content of each element belonging to group 17 of the periodic table is less than 100 ppm by mass, and (C) the content of each element of Cr, Mn, Fe, Co, Ni, Cu, and Zn is 5 Additives for electrochemical devices, less than ppm by mass.