TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The anode comprises positive electrode active material which is a mixture comprising lithium-nickel-cobalt-manganese-containing complex oxide of formula: Li(LixNiaCobMnc)O2 (I), lithium-manganese-containing complex oxide of formula: LiMn2-yMyO4 (II), and lithium-cobalt-containing complex oxide of formula: Li1+pCozM'1-zAX4 (III). The cathode contains negative electrode active material.x=more than 0 to 0.3;c=0.3-0.7;a+b=more than 0 and less than 0.5;a+b+c+d=1;M=nickel, cobalt, iron, phosphorus, sulfur, zirconium, titanium or aluminum;y=more than 0 to 2;M'=aluminum, magnesium, nickel, cobalt, manganese, titanium, gallium, copper, vanadium, niobium, zirconium, cerium, indium, zinc or yttrium;X=O, F or N;A=P or S;p=0-0.2;andz=0.5-1.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The monomer having 2-6 acrylate groups, is di-trimethylolpropane tetraacrylate, dipentaerythritol pentaacrylate and/or dipentaerythritol hexaacrylate. The content of monomer is 0.1-10 wt.% with respect to total content of the composition. The lithium salt is hexafluorolithium phosphate, tetrafluorolithium borate, hexafluorolithium antimonate, hexafluoro lithium arsenate, lithium perchlorate, lithium bis(pentafluoroethanesulfonyl)imide (LiN(C2F5SO2)2), lithium bis(trifluoromethanesulfonyl)imide, lithium trifluoromethane sulfonate, trifluoromethanesulfonylmethide or lithium bisoxalatoborate. The electrolyte solvent is linear carbonate and/or cyclic carbonate. The linear carbonate is dipropyl carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, methyl propyl carbonate and/or ethyl propyl carbonate. The cyclic carbonate is ethylene carbonate, propylene carbonate, 1,2-butylene carbonate, 2,3-butylene carbonate, 1,2-pentylene carbonate, 2,3-pentylene carbonate, and/or their halides and carbonates.    TECHNOLOGY FOCUS - POLYMERS - Preferred Composition: The gel polymer electrolyte comprises a composition containing electrolyte solvent, ionizable lithium salt and a monomer having 2-6 acrylate groups.