| abstract |
In particular, even when an Mn-Ti-based electrolyte is used, a red electrode for a redox flow battery having excellent oxidation resistance is provided while stabilizing Mn ions to suppress an increase in cell resistance during initial charge and discharge. The electrode material of the present invention includes a carbonaceous fiber (A) and a carbonaceous material (B) binding the carbonaceous fiber (A), and satisfies the following requirements. (1) In the carbonaceous material (B), when the size of a crystal in the c-axis direction obtained by X-ray diffraction is Lc (B), Lc (B) is 10 nm or more, and (2) carbonaceous fiber ( When the size of the crystallites in the c-axis direction obtained by X-ray diffraction in A) is Lc (A), Lc (B) / Lc (A) is 1.0 or more, and (3) bound oxygen on the surface of the carbon electrode material. The number of atoms is 1.0% or more of the total number of carbon atoms on the surface of the carbon electrode material. |