TECHNOLOGY FOCUS - POLYMERS - Preferred Material: The polyelectrolyte material is represented by formula (1). The average number of carbon atoms contained in side chain of polyelectrolyte raw material is 20 or less. The polyelectrolyte raw material has weight average molecular weight of 300-5000 and viscosity of 20-600 cP at 25 degreesC. The polyelectrolyte raw material consists of compound having one cross-linkable group, and compound having 2 or more cross-linkable groups.R 1=5C or less alkyl;R 2=polyether side chain;R 3=cross-linkable group or 5C or less alkyl;X,Y=cross-linkable group, hydrogen or 5C or less alkyl;anda-d=0 or more, where at least one of a-d is not 0.Preferred Composition: The inkjet composition contains active materials (15-60 mass%) and polyelectrolyte raw material (10-60 mass%). The composition further contains carbon powder, polymerization initiator, lithium salt and solvent in which the polyelectrolyte raw material is dissolved. Preferred Base Material: The base material used in manufacture of electrode, is a collector or polymeric electrolyte film. Preferred Electrode: The electrode has an electrode layer of 0.5-20 microns thickness formed by ejecting the inkjet composition using inkjet system. EXAMPLE - Polyethylene glycol diacrylate having viscosity of 30 cP at 25 degrees C and weight average molecular weight of 700, and polyethylene glycol methyl ether acrylate having viscosity of 25 cP at 25 degrees C and weight average molecular weight of 500, were mixed in mass ratio of 50:50, to obtain polyelectrolyte raw material. Lithium salt (LiN(SO 2C 2F 5) 2) (in mass%) (10) was dissolved in small amount of dry acetonitrile. Then, obtained polyelectrolyte raw material (40) and negative electrode active material (ground carbonized product of MCMB) (45) having average particle diameter of 0.7 microns, were added and mixed for 30 minutes. Then, dry acetonitrile containing benzyl dimethyl ketal (photoinitiator) (5), was added and further mixed for 5 minutes. Thus, negative-electrode inkjet composition having viscosity of 135 cP at 25 degreesC was obtained. A negative electrode was produced using the obtained inkjet composition by ultraviolet inkjet printer. The thickness of the negative electrode layer containing polyelectrolyte was 2-3 microns. The electrode layer was excellent in battery characteristic.