TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The cathode active material of cathode comprises oxide of formulae: Li(LixNiaCobMnc)O2 (I), LiMn2-yMyO4 (II) and Li1+eCozM'1-zAX4 (III).x=0-0.3 (excluding 0);c=0.3-0.7;a+b=0-0.5 (excluding 0-0.5);x+a+b+c=1;M=Ni, Co, Fe, P, S, Zr, Ti or Al;y1=0-2 (excluding 0);M'=Al, Mg, X, Ni, Co, Mn, Ti, Ga, Cu, V, Nb, Zr, Ce, In, Zn or Y;X=O, N or S;e=0-0.2;andz=0.5-1.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The monomer having functional group is acrylonitrile monomer or acrylate-based monomer. The monomer having functional group is preferably 2-cyanoethyl acrylate, 2-cyano-ethoxy-ethyl acrylate, acrylonitrile, ethyl-(E)-3-(pyridin-2-yl)acrylate, ethyl (E)-3-(4-pyridinyl)-2-prophenone salt, 3,3'-(2,2-by pyridine)4'-diyl-bis-dimethyl 2-propenoate, 2-(2,2-bipyridine)-6-yl ethyl 2-propenoate, 2-(2,2 bipyridine)-5-yl ethyl 2-propenoate, 2-(2,2-bipyridine)-4-yl ethyl 2-propenoate, 1,1'-((2,2-bipyridine)4'-diyl-bis(methylene))-2-propenoate, 1,10-phenanthroline-2,9-diyl-bis(methylene)-2-propenoate, 3-(1,10-phenanthrolin-2-yl)-phenyl methyl 2-propenoate and 2-(((1-oxo-2-propenyl)oxy)methyl)-2-((1,10-phenanthroline-5-ylmethoxy)methyl)-1,3-propan-diyl-2-propenoate. The composition further comprises branched monomer having 2-6 acrylate groups. The branched monomer is di-trimethylolpropane tetraacrylate, dipentaerythritol hexaacrylate and/or dipentaerythritol pentaacrylate. The amount of monomer having functional group and branched monomer in composition is 0.1-10 wt.%, respectively. The weight ratio of monomer having functional group and branched monomer in composition is 0.1-10. The lithium salt is lithium hexafluorophosphate, lithium tetrafluoroborate, lithium hexafluoroantimonate, lithium hexafluoroarsenate, lithium perchlorate, lithium pentafluoroethane sulfonamide and/or lithium trifluoromethanesulfonimide. The electrolyte solvent is linear carbonate and/or cyclic carbonate. The linear carbonate is dimethyl carbonate, diethyl carbonate, dipropyl 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-pentene carbonate, 2,3-pentene carbonate and/or vinylene carbonate, or their halide. The functional group is cyanide, (2,2')bipyridinyl, pyridine, (1,10)phenanthroline, 1,4,7,10-tetraaza-cyclododecane and nitrogen-containing compound of formula (I) (all optionally substituted with 1-5C alkyl or halo).R=not defined.N.B. R is not defined.