Electrode material, paste for electrodes, and lithium ion battery

摘要

An electrode material in which an electrode active material (1) having a carbonaceous film (2) formed on the surface is used and which is capable of suppressing a voltage drop when high-speed charge and discharge is carried out in a low-temperature environment is provided. The electrode material, wherein the electrode material (1) has a particulate shape, a carbonaceous film (2) is formed on surfaces of electrode active material particles, and the carbonaceous film is constituted of randomly stacked graphene layers. Preferably, the ratio obtained by dividing the average migration distance of lithium ions (3) that bypass the structure in the carbonaceous film and migrate by the thickness of the carbonaceous film is in a range of 1.1 to 100.