TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The central metal is group-4-8 transition element or rare earth-metal element, preferably vanadium, chromium, titanium, zirconium, or hafnium. The active material of positive electrode contains a transition metal oxide of formula: LiaM1Ob (IV), Lic(M2)2Od (V), or LieM3((PO)4) f (VI). The active material is chosen from lithium cobaltate, lithium manganate, lithium nickelate, nickel-manganese-lithium cobaltate, manganese-lithium-nickelate, nickel-cobalt-lithium-aluminate, and lithium vanadium phosphate.M1-M3=cobalt, nickel, iron, manganese, copper, vanadium, titanium, or chromium;a=0.02-1.2;b=1-3;c=0.02-2;d=3-5;e=0-2;andf=1-5.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Property: The charge electric potential during normal charging of battery using the positive electrode on lithium or lithium ions reference is 4.25-5 V. Preferred Composition: The organometallic compound is a nitrogen-containing compound of formula (I), preferably of formula (II) or (III). The amount of organometallic compound contained in the electrolyte solution is 0.0001-0.5 mol/L with respect to total amount of the electrolyte solution. The electrolyte solution further contains aromatic compound, halogen-containing compound, phosphorus-containing compound, sulfur-containing compound, silicon-containing compound, nitrile compound, or polymeric compound.M=center metal;A1,A2=aryl or heteroaryl;R1=alkyl, aryl, heteroaryl, or alkenyl, in which 2 or more R1 forms ring by bonding or condensing;X=CR2 or nitrogen atom;R2,R7,R8=H, alkyl, alkenyl, hydroxy, alkoxy, aryloxy, thiol, alkylthio, or arylthio;R1+R2=ring;R3-R6=substituent, in which R4 and R6 forms ring with portion of B1 and B2 by bonding or condensing;Y=monodentate ligand;k=1-4;l,n,o,p=0-3;m=0-2;B1,B2=nitrogen-containing aromatic heteroaryl;L=alkylene, arylene, heteroarylene, or alkenylene;R9,R10=alkyl, aryl, or heteroaryl;andR31,R51=substituent or H. Preferred Definitions:    L=cycloalkylene or arylene.