NOVELTY - A polymer containing a pyrazino quinoxaline compound, and capable of performing electrochemical oxidation-reduction reaction, is new.    USE - For composite of electrode material used in battery electrode of secondary battery (all claimed). Polymer is used for proton shift-type battery.    ADVANTAGE - The polymer provides composite electrode material having high conductivity. The battery using the polymer has long shelf-life, good safety, weight energy density and reliability. The electrode using the polymer has a high-speed electric current property.    DETAILED DESCRIPTION - A polymer containing a pyrazino quinoxaline compound having formula (1), and capable of performing electrochemical oxidation-reduction reaction, is new.    R1-R6 = group which bonds to main chain of polymer and/or groups which form main chain of polymer and rest are chosen from H, halogen, OH, NO2, carboxylic acid group, carboxylic acid ester group, sulfonic acid group, sulfonic acid ester group, optionally substituted 1-20C alkyl, optionally substituted 2-20C alkenyl, optionally substituted 2-20C alkynyl or optionally substituted aryl.    INDEPENDENT CLAIMS are included for the following:    (1) composite, which has polymer containing pyrazino quinoxaline, provided on the surface of an electroconductive carbon material;    (2) manufacturing method of composite. A tetraamino benzene derivative of formula (7) and a tetracarbonyl compound are subjected to dehydration condensation polymerization in presence of an electroconductive carbon material to obtain a composite;    (3) battery electrode, for a secondary battery whose anode, cathode and/or electrolyte perform charging and discharging reaction by proton insertion-discharge;    (4) manufacturing method of battery electrodes which involves molding the composite by heating-press method; and    (5) secondary battery using the battery electrode.    R37 and R38 = same as R1-R6.    DESCRIPTION OF DRAWING(S) - The figure shows the outline sectional drawing of the secondary battery.