Active material and a secondary battery using the active material

An active material for a secondary battery, wherein the secondary battery has a positive electrode, a negative electrode and an electrolyte as the active material for at least one of the positive electrode and the negative electrode,

• the active material comprising:
• an electrically conductive polymer compound represented by the following general formula (A):
• wherein R1 to R3 in the general formula (A) are each independently selected from hydrogen and an alkyl group having 1 to 4 carbon atoms, and at least one of R1 to R3 has any of the structures represented by the following general formulas (1) to (4):
• wherein symbol * represents the position at which the structures of the general formulas (1) to (4) respectively bind to a carbon atom or nitrogen atom of the pyrrole ring in the general formula (A);
• in the general formulas (1) to (4), R is H, OH, CH3 or NH2, Y is —(CH2)m— (wherein m is an integer from 0 to 10);
• and when m is not less than 1, at least one methylene group which constitutes Y can be substituted by —O—, —CH═N—, —S—, —CO—, or any one of the following: