NOVELTY - Secondary battery with improved capacity, utilizing an electrode reaction of an active material in the reversible oxidation/reduction cycle in the positive or negative electrode, where the active material comprises 17 nitroxide compounds (IA), which are chemically bonded directly or via a linking group to a triazine compound (II).    USE - (IA) are useful as an active material in the positive or negative electrodes of a secondary battery (claimed).    ADVANTAGE - The active material has a spin concentration of at least 1021 spin/g. (IA) provides secondary battery with improved capacity (all claimed). (IA) provides stable secondary battery. (IA) (linked to 1,3,5 triazines) can afford active electrode materials having a charge capacity higher than the one theoretically achievable from the reversible oxidation/reduction of all nitroxide groups present in the molecule. The molecular combinations of 1,3,5 triazines with (IA) can show synergistic effect. (IA) (when consists of lighter elements such as carbon, hydrogen and oxygen) provides a secondary battery with high energy density per weight.    DETAILED DESCRIPTION - Secondary battery with improved capacity, utilizing an electrode reaction of an active material in the reversible oxidation/reduction cycle in the positive or negative electrode, where the active material comprises 17 nitroxide compounds (IA) e.g. heterocyclic nitroxide compounds of formulae (IIa)-(IIe), which are chemically bonded directly or via a linking group to a triazine compound of formula (II).    a1 = valence indicating the bond to the triazine structural element;    aryl = phenyl or naphthyl;    G = (=N-O.) (preferred) or (=N+=O) A-; and    A- = anion derived from an organic or inorganic acid.    Provided that (IA) is not the nitroxide compound of formula (A). INDEPENDENT CLAIMS are included for:    (1) a method for providing the secondary battery, comprises incorporating the active material in the positive or negative electrodes;    (2) use of (IA) as an active material in the positive or negative electrodes of a secondary battery; and    (3) the triazine compounds (c1)-(c7).