Fused-ring quinone-substituted polynorbornene, electrode active material and secondary battery

A fused-ring quinone-substituted polynorbornene having recurring units of formula (1) and/or (2) below

• wherein each A1 is independently a substituent of formula (3) or (4) below, n is an integer from 1 to 6, and A2 is a substituent of formula (5) or (6) below
• wherein each X is independently a single bond or a divalent group, and Ar1 and Ar2 are each independently an aromatic hydrocarbon ring or an oxygen atom- or sulfur atom-containing aromatic heterocycle that forms together with two carbon atoms on a benzoquinone skeleton,
• provided that when A1 is a substituent of formula (3) and Ar1 and/or Ar2 are benz moieties, the recurring units of formula (1) are recurring units of formula (1-1) below
• wherein X is as defined above, R1 to R7 are each independently a hydrogen atom, a halogen atom, a hydroxyl group, a mercapto group, an amino group, a substituted or unsubstituted alkyl group of 1 to 12 carbon atoms, a substituted or unsubstituted alkenyl group of 2 to 12 carbon atoms, a substituted or unsubstituted alkynyl group of 2 to 12 carbon atoms, a substituted or unsubstituted aryl group of 6 to 12 carbon atoms, a substituted or unsubstituted heteroaryl group of 3 to 12 carbon atoms, a substituted or unsubstituted alkoxy group of 1 to 12 carbon atoms, a substituted or unsubstituted alkylthio group of 1 to 12 carbon atoms, a substituted or unsubstituted monoalkylamino group of 1 to 12 carbon atoms, a dialkylamino group in which each alkyl group is independently a substituted or unsubstituted alkyl group of 1 to 12 carbon atoms, or an alkylcarbonyl group of 2 to 12 carbon atoms, and n1 is 2.